Cardiology Group Reduces AR Days from 58 to 12 and Recovers $280,000

The Practice

HeartPoint Cardiology Associates is a comprehensive cardiology practice located in downtown Denver, Colorado. The group consists of five board-certified cardiologists: Dr. Robert Kaminski (interventional cardiology), Dr. Lisa Nakamura (electrophysiology), Dr. David Okonkwo (heart failure and transplant), Dr. Michelle Stern (non-invasive cardiology and imaging), and Dr. Ahmed Al-Rashidi (preventive cardiology). The practice operates out of a 16,000-square-foot facility that includes a two-room cardiac catheterization laboratory, a nuclear cardiology suite, an echocardiography lab, a cardiac rehabilitation program, and a device clinic that monitors approximately 840 patients with implanted cardiac devices (pacemakers, ICDs, CRT devices, and implantable loop recorders).

HeartPoint handles approximately 260 office visits per week, performs an average of 22 catheterization procedures per week (diagnostic catheterizations, coronary interventions, structural heart procedures, and EP studies/ablations), and processes over 3,200 remote device monitoring transmissions per month. The practice's payer mix is weighted toward Medicare given their patient demographics: 44% Medicare, 28% commercial insurance, 12% Medicare Advantage, 9% Medicaid, 4% Tricare/VA, and 3% self-pay. Annual gross charges totaled approximately $11.4 million, with net collections at $7.2 million - a collection rate that, while seemingly reasonable, concealed significant revenue leakage in several critical areas.

The practice had been using a regional billing company for the past four years. While the billing company handled basic claims submission and follow-up, they lacked the specialty-specific expertise required for cardiology's complex procedural coding, device monitoring billing, and cath lab charge capture. HeartPoint also used Epic's ambulatory module as their EMR, with a separate hemodynamic recording system in the cath lab and a third-party device monitoring platform (Medtronic CareLink, Abbott Merlin.net, and Boston Scientific LATITUDE) for remote device interrogations. The fragmentation across these systems meant that critical billing data was trapped in silos, and the billing company had no visibility into the cath lab or device monitoring workflows.

The Challenge

When Dr. Robert Kaminski, HeartPoint's managing partner, first reviewed the practice's detailed financial analytics, the numbers told a troubling story. Despite performing high-complexity, high-reimbursement procedures and maintaining a busy office schedule, the practice's cash flow was chronically unpredictable. Accounts receivable stood at 58 days - nearly five times the 12-day benchmark that top-performing cardiology practices achieve. More alarming, 27% of the practice's total AR balance was sitting in the 90+ day aging bucket, representing approximately $520,000 in claims that had been languishing for three months or longer. Of those aged claims, historical data showed that only about 40% would ultimately be collected, meaning the practice was staring at a potential write-off of over $310,000 from aged receivables alone.

The root causes were multifaceted. The most financially significant problem was in the catheterization laboratory. Cath lab procedures are among the highest-reimbursement services in cardiology, with individual case charges ranging from $4,500 for a diagnostic catheterization to $45,000 for a complex coronary intervention with drug-eluting stent placement. The coding for these procedures requires precise documentation of the vessels accessed, the number of vessels treated, the specific interventional techniques used (balloon angioplasty, stent placement, atherectomy, thrombectomy, etc.), the use of intravascular imaging (IVUS/OCT), and the supervision of conscious sedation. HeartPoint's billing company was coding cath lab cases based on brief summary reports rather than the full hemodynamic and procedural documentation, resulting in systematic undercoding of multi-vessel interventions and failure to capture separately billable components like intravascular imaging, fractional flow reserve (FFR) measurement, and conscious sedation supervision. An internal audit later revealed that an average of $1,200 per cath case was being left unbilled due to incomplete charge capture - across 1,100+ annual cath procedures, that represented approximately $1.3 million in gross charges never submitted.

Remote cardiac device monitoring represented the second major revenue gap. HeartPoint monitored 840 patients with implanted cardiac devices, generating over 3,200 remote monitoring transmissions per month. Under CPT codes 93294-93299, each remote monitoring transmission is billable when reviewed and interpreted by a physician - representing a significant recurring revenue stream. However, the billing company had no integration with the device monitoring platforms and relied entirely on the practice's staff to manually generate superbills for each transmission. The device clinic nurse was responsible for reviewing transmissions, routing urgent findings to the cardiologists, and creating billing tickets - but with over 150 transmissions per day across three different manufacturer platforms, the billing ticket process was woefully incomplete. The practice estimated that only 55% of billable remote monitoring events were being captured, with the remaining 45% simply never entering the billing workflow. At an average reimbursement of $42 per monitoring event, the missed revenue was approximately $68,000 per month - or $816,000 annually. This was, by far, the single largest revenue leak in the practice.

The third challenge was a pattern of aging claims that the billing company was failing to work aggressively. When claims were denied or underpaid, the billing company's follow-up process was slow and reactive. Denied claims sat in a work queue for an average of 18 days before a first follow-up attempt was made. If the first follow-up was unsuccessful, the average time to second follow-up was another 22 days. By the time a claim received meaningful attention, it had often aged 60-75 days, and the urgency of resolution increased exponentially with each passing week as timely filing deadlines approached. For Medicare claims (44% of the payer mix), the timely filing deadline is 12 months - generous, but the likelihood of collecting a Medicare claim drops below 50% after 90 days in AR. For many commercial payers, timely filing deadlines of 90-180 days meant that the billing company's slow follow-up was directly causing permanent revenue loss.

Patient billing and collections presented another area of concern. Cardiology patients often face significant out-of-pocket costs for procedures, particularly those with high-deductible health plans. HeartPoint had no systematic process for pre-procedure financial counseling, no automated payment reminder system, and no convenient self-service payment options. Patient collection rates were running at 47%, with an average time-to-collect of 84 days for patient-responsibility balances. Many patients simply never paid their bills, not out of unwillingness but because they never received a clear, timely, actionable bill. The practice's patient billing process consisted of paper statements mailed monthly - a method that increasingly landed in the "junk mail" pile and generated minimal response.

The CareVixis Solution

CareVixis's revenue audit was the most extensive the practice had ever undergone. Over a five-day period, CareVixis analysts reviewed six months of cath lab procedure logs, twelve months of device monitoring transmission records, the complete aged AR inventory, payer contract fee schedules, and denial pattern data. The audit identified $280,000 in immediately recoverable revenue from aged claims that were still within timely filing windows, plus an estimated $1.1 million in annualized revenue improvement through proper charge capture, coding optimization, and accelerated AR management. HeartPoint enrolled in CareVixis's full-service back-office solution, which includes custom reporting dashboards and SIPLYPhone.com integration for patient payment reminders at no additional cost.

The technical integration was the most complex CareVixis had undertaken for a cardiology practice, connecting four separate data systems into a unified billing workflow. CareVixis's engineering team built API integrations with Epic's ambulatory module (for office visit encounters, demographics, and scheduling), the cath lab's hemodynamic recording system (for detailed procedural documentation, device usage, and supply tracking), and the three device monitoring platforms (CareLink, Merlin.net, and LATITUDE) for real-time transmission data. A total of 118 of CareVixis's 151+ API endpoints were utilized in this integration, with all data flowing through CareVixis's AWS-hosted infrastructure with KMS encryption. The integration was completed in 16 business days, including rigorous testing of data accuracy across all four source systems.

For cath lab coding, CareVixis deployed its proprietary clinical coding engine with cardiology-specific configuration that represented the most specialized deployment in the platform's capabilities. The hybrid RAG (Retrieval-Augmented Generation) knowledge base was loaded with the complete interventional cardiology CPT code set (93451-93572 for catheterization, 92920-92944 for coronary interventions, 93600-93662 for EP studies, and the associated imaging supervision and interpretation codes), CCI bundling edits specific to cardiac catheterization, the ACC/SCAI procedural coding guidelines, and the practice's payer-specific contract rules including carve-out reimbursement rates for high-cost devices and supplies.

The five-workflow proprietary pipeline was configured for maximum charge capture in the cath lab setting. The Clinical Extraction workflow parsed full hemodynamic reports (not just summary notes), identifying every vessel accessed, every intervention performed, the use of adjunctive technologies (IVUS, OCT, FFR, iFR), conscious sedation time, and fluoroscopy time. The CPT Support workflow mapped each procedural element to its correct CPT code, applying proper sequencing for multi-vessel interventions, correct modifier usage for bilateral procedures, and separate billing for imaging supervision and interpretation when performed by the attending cardiologist. The Gap Detection workflow was specifically tuned for cath lab revenue leakage patterns common in cardiology: missed FFR/iFR billing when the measurement was documented but not coded, failure to bill conscious sedation supervision separately from the primary procedure, underreporting of intravascular imaging when used as a diagnostic adjunct, and missed drug administration codes for intra-procedural medications. The Contradiction Detection workflow cross-referenced the procedure report against supply usage records to ensure that every stent deployed, every balloon used, and every guide wire consumed was reflected in the billing - a critical check that had been entirely absent in the previous billing company's workflow.

All procedural documentation was processed through CareVixis's PII stripping layer before reaching the proprietary pipeline. HIPAA Safe Harbor de-identification removed all 19+ PHI pattern types from hemodynamic reports, cath lab notes, and device monitoring transmissions. This was particularly important for the device monitoring workflow, where transmissions contain device serial numbers, patient-specific programming parameters, and clinical alert data. Patient data was never exposed to any external system, and all de-identified analysis was reviewed by CareVixis's certified cardiology coders (CCCs) before claim submission.

For device monitoring billing, CareVixis built an automated capture workflow that was fundamentally different from the manual superbill process the practice had been using. The API integration with the three device monitoring platforms pulled transmission data in real time, automatically identified billable events (distinguishing between remote monitoring transmissions, in-person interrogations, and non-billable technical-only transmissions), matched each transmission to the reviewing/interpreting physician, verified that a physician interpretation was documented, and generated the appropriate CPT codes (93294 for pacemaker remote monitoring, 93295 for ICD remote monitoring, 93296 for the practice's technical component, 93297/93298 for implantable loop recorder monitoring, and 93299 for remote monitoring of subcutaneous cardiac rhythm monitors). The system also tracked the 91-day monitoring period rule, ensuring that monitoring was billed at the correct frequency and that no billable period was missed. This automated workflow replaced the manual ticket-generation process entirely, ensuring that 100% of billable remote monitoring events were captured and submitted.

CareVixis's automated collections pipeline was deployed with aging bucket triggers specifically calibrated for HeartPoint's payer mix and claim types. Claims in the 0-30 day bucket received automated electronic status checks every 72 hours. At 31-60 days, escalated follow-up protocols initiated automated appeal generation for denied claims and direct electronic inquiry for pending claims. At 61-90 days, claims were assigned to CareVixis's senior AR specialists for direct payer phone follow-up. And any claim reaching 90+ days triggered an immediate escalation to the AR recovery team, which was tasked with extracting maximum recovery from aged claims before timely filing deadlines. For HeartPoint's existing aged AR inventory - $520,000 in claims over 90 days - CareVixis deployed a dedicated recovery team that worked exclusively on aging claims for the first 60 days of the engagement.

SIPLYPhone.com integration was deployed specifically for patient payment communication. The system delivered automated balance notifications via SMS within 48 hours of claim adjudication, with secure payment links that allowed patients to pay via credit card, debit card, or bank transfer directly from their phone. For balances over $500 (common for cath lab procedures with patient responsibility), the system offered automated payment plan setup with configurable installment options. Follow-up payment reminders were sent at 7-day, 14-day, and 30-day intervals for unpaid balances, with escalating urgency in messaging. The Intelligent Call Bot handled inbound payment inquiries, balance questions, and payment arrangement calls, while the Intelligent IVR routed clinical calls to the appropriate provider's nurse. All patient payment communications were HIPAA-compliant with encrypted messaging and compliant call recording.

The included Custom Reporting Dashboards provided HeartPoint's leadership with real-time financial dashboards that they had never previously had access to. These included: daily charge and collection summaries by provider and by service type, real-time AR aging analysis with drill-down to individual claims, device monitoring billing compliance reports showing capture rate by device type and manufacturer platform, cath lab charge capture analysis showing billed charges versus expected charges for each procedure, denial rate trending by category and payer, and provider-level productivity and coding pattern analysis. Dr. Kaminski described these reports as "the first time we've ever really been able to see our practice's financial health in real time."

The Implementation

HeartPoint's implementation was executed in a structured five-phase rollout over 35 days - the most comprehensive implementation timeline of any CareVixis engagement, reflecting the practice's complexity. Phase one (days 1-10) focused on the four-system technical integration, including extensive data validation to ensure accuracy across Epic, the hemodynamic system, and the three device monitoring platforms. Phase two (days 11-17) deployed the proprietary coding engine in shadow mode against two weeks of cath lab cases. The shadow analysis revealed that the previous billing company had been undercoding an average of $1,340 per cath case - slightly above the initial audit estimate - primarily through missed intravascular imaging codes, incomplete multi-vessel intervention coding, and failure to bill conscious sedation supervision separately.

Phase three (days 18-24) focused on the device monitoring billing workflow. CareVixis's automated system processed the prior three months of remote monitoring transmission data and identified 4,210 billable events that had never been submitted. After physician verification of interpretations (which were already documented in the device monitoring platforms but had never generated billing tickets), CareVixis submitted retroactive claims for all eligible transmissions within timely filing windows, recovering $176,820 in the first 60 days of the engagement. Going forward, the automated system captured 100% of billable transmissions in real time.

Phase four (days 25-30) transitioned all AR management and follow-up from the previous billing company to CareVixis. The dedicated aged AR recovery team began working the $520,000 in 90+ day claims, prioritizing claims by dollar value and proximity to timely filing deadlines. Phase five (days 31-35) activated SIPLYPhone patient payment communication and the custom reporting dashboards. The previous billing company's contract was terminated on day 35, and CareVixis assumed complete revenue cycle management responsibility. Two of HeartPoint's three internal billing staff were retained as CareVixis liaisons and quality assurance reviewers; the third was reassigned to the device clinic to support the increased documentation requirements for the now-complete device monitoring billing workflow.

The Results

The twelve-month results fundamentally transformed HeartPoint's financial position, taking the practice from chronic cash flow uncertainty to industry-leading revenue cycle performance. The combined impact of AR acceleration, aged claim recovery, device monitoring capture, cath lab coding optimization, and improved patient collections totaled $280,000 in recovered revenue from aging claims alone, with annualized revenue improvements far exceeding that figure.

Days in AR: Average days in accounts receivable dropped from 58 to 12 - a 79% reduction that placed HeartPoint in the top 5% of cardiology practices nationally for AR performance. The transformation was driven by three factors: CareVixis's 97.8% clean claim rate (ensuring that the vast majority of claims were accepted on first submission), the automated aging bucket triggers (ensuring immediate follow-up on any claim that wasn't paid within expected timeframes), and the real-time electronic payer status monitoring (catching claim issues within 48-72 hours of submission rather than waiting weeks for EOBs). The percentage of total AR in the 90+ day bucket dropped from 27% to 1.4%, representing a reduction from $520,000 to approximately $68,000 - and even that $68,000 was actively being worked, not languishing.

Aged Claim Recovery: CareVixis's dedicated AR recovery team recovered $280,000 from the $520,000 in aged claims that were in the 90+ day bucket at the start of the engagement. This 54% recovery rate on claims that the previous billing company had essentially abandoned represented the immediate, tangible ROI that justified the entire transition. The recovery was achieved through a combination of systematic appeal filing, peer-to-peer reviews for clinically denied claims, corrected-claim resubmission for coding-related denials, and direct payer negotiation for underpaid claims. Of the $240,000 that was not recoverable, approximately $180,000 had already passed timely filing deadlines due to the previous billing company's inaction - permanent revenue loss that would have been prevented had CareVixis's automated follow-up system been in place earlier.

Device Monitoring Billing: This was the single largest revenue improvement category. Device monitoring billing capture improved from approximately 55% to 100% of eligible transmissions. With 840 monitored patients generating an average of 3.8 billable monitoring events per patient per year (reflecting the 91-day monitoring period rule), the practice now billed approximately 3,192 monitoring events annually at an average reimbursement of $42 per event. Annual device monitoring revenue increased from approximately $74,000 (55% capture at historical rates) to $134,000 (100% capture) - an increase of $60,000 per year in pure recurring revenue with no additional clinical effort. Additionally, the retroactive claim recovery for the prior three months of missed transmissions generated $176,820 in one-time recovery, of which approximately $168,000 was ultimately collected.

Cath Lab Charge Capture: Proper coding of catheterization procedures through the proprietary coding engine increased average net reimbursement per cath case by $1,480. The improvement came from four primary areas: intravascular imaging billing (IVUS/OCT codes were now captured on 100% of cases where imaging was documented, versus approximately 60% previously), FFR/iFR measurement billing (captured on 100% of documented cases versus 45% previously), conscious sedation supervision billing (now billed separately on all eligible cases), and multi-vessel intervention coding optimization (proper sequencing and modifier usage for complex multi-vessel PCI cases). Across approximately 1,140 annual cath lab procedures, the incremental charge capture represented approximately $1.69 million in additional gross charges submitted, yielding approximately $890,000 in incremental net collections after payer adjustments. This was the largest annualized revenue improvement, though it was not included in the "$280,000 recovered" headline figure because it represented new charge capture rather than recovery of previously submitted claims.

Clean Claim Rate: The clean claim rate improved from 82% (under the previous billing company) to 97.8%. This improvement was the engine behind the AR days reduction: with 97.8% of claims accepted on first submission, the volume of denials requiring rework dropped by over 85%, and the CareVixis team could focus its follow-up resources on the small number of legitimate denials rather than drowning in avoidable rejections. The denial rate dropped from 14% to 3.2%, with the remaining denials being primarily legitimate medical necessity reviews on high-cost interventional procedures - which CareVixis's team resolved through peer-to-peer reviews with a 94% overturn rate.

Patient Collections: SIPLYPhone's automated payment communication transformed patient collections. The patient collection rate improved from 47% to 82%, and the average time-to-collect for patient-responsibility balances dropped from 84 days to 19 days. The mobile payment links were particularly effective for cardiology patients, many of whom faced significant out-of-pocket costs for procedures. The automated payment plan option was utilized by 34% of patients with balances over $500, with a 91% completion rate on established payment plans. Total incremental patient collection revenue was approximately $124,000 in the first year.

Total Financial Impact: The direct, measurable financial impact in year one comprised: $280,000 in aged claim recovery, $168,000 in retroactive device monitoring recovery, $890,000 in incremental cath lab charge capture, $60,000 in ongoing device monitoring revenue improvement, and $124,000 in improved patient collections. The total first-year financial impact exceeded $1.52 million. However, the practice chose to headline the "$280,000 recovered from aging claims" figure because it represented the most conservative, directly attributable result - money that was already earned, already billed, and simply needed to be collected. After CareVixis fees, the net financial improvement exceeded $1.2 million in year one, representing a 17% increase in net collections.

Why It Worked

100% US-Based Team: Cardiology billing is among the most specialized and complex subspecialties in medical billing. The interplay between diagnostic catheterization codes, interventional codes, imaging codes, device monitoring codes, and the myriad of modifiers, bundling rules, and payer-specific policies requires a level of expertise that simply cannot be developed without deep immersion in the American cardiology billing landscape. CareVixis's 100% US-based team included Certified Cardiology Coders (CCCs) and Certified Interventional Radiology Cardiovascular Coders (CIRCCs) who lived and breathed cardiology coding. When a complex structural heart case required coordination between the interventional cardiologist, the cardiac surgeon, and a visiting proctor, the CareVixis team managed the coding in real time with full understanding of the teaching physician rules, co-surgery billing requirements, and proctor supervision documentation standards.

Direct Access to Decision Makers: Dr. Kaminski emphasized the importance of direct communication during high-stakes situations. "When we had a $45,000 complex PCI claim denied for medical necessity, I didn't have to file a support ticket and wait three days. I called my CareVixis lead, we reviewed the case together, and within 24 hours they had prepared a detailed peer-to-peer appeal package with clinical evidence, ACC guidelines, and the specific medical necessity criteria for the payer. The denial was overturned in four days. With our previous billing company, that claim would have sat in a queue for weeks, and we probably would have lost it to timely filing."

Technology-First Approach: The volume and complexity of data flowing through a cardiology practice - cath lab hemodynamics, device monitoring transmissions across three platforms, nuclear cardiology reports, echocardiogram interpretations, office visit notes - makes cardiology an ideal environment for proprietary algorithm-driven billing automation. CareVixis's proprietary coding engine processed each cath lab case against thousands of procedure-specific rules, bundling edits, and payer policies in seconds, achieving accuracy that exceeded the previous billing company's manual coders by a significant margin. The automated device monitoring billing workflow alone eliminated the need for manual superbill generation on over 3,200 monthly transmissions, converting what had been the practice's largest revenue leak into a seamless, fully captured revenue stream. The hybrid RAG knowledge base was continuously updated with the latest ACC procedural coding guidelines, CMS national coverage determinations, and payer-specific policy changes, ensuring that the system's accuracy improved over time rather than degrading as it does with human-only processes that rely on periodic training updates.

SIPLYPhone Patient Communication: Cardiology patients face some of the highest out-of-pocket costs in medicine, particularly for interventional procedures. The combination of immediate post-adjudication balance notifications, secure mobile payment links, automated payment plan options, and persistent but respectful follow-up reminders created a patient payment experience that was both more effective and more patient-friendly than the previous paper-statement-based approach. The 35-percentage-point improvement in patient collection rate (from 47% to 82%) was directly attributable to SIPLYPhone's technology, and the patient satisfaction scores related to billing experience improved from 2.8 to 4.4 out of 5.0. Multiple patients specifically commented on how much they appreciated receiving a clear text message with a payment link rather than a confusing paper statement weeks after their procedure.

Risk-Reversal Guarantee: Switching billing companies for a practice generating $11.4 million in gross charges was a decision that carried enormous financial risk. "Our CFO calculated that a botched billing transition could cost us $400,000 to $600,000 in the transition period," Dr. Kaminski recalled. "CareVixis's 90-day guarantee was the difference between paralyzing indecision and pulling the trigger. They guaranteed that if our collections didn't improve, we could walk away - and they would eat the cost of the transition. In the end, our collections improved in the first month. By month three, we had already recovered $280,000 in aging claims that our previous company had given up on. The guarantee was never in question, but the fact that they offered it told us everything we needed to know about their confidence in their platform."