Ambulatory Specialty Model (ASM) for Cardiologists: What Heart Failure Specialists Need to Know
A practical summary of the Ambulatory Specialty Model (ASM) for cardiologists—covering participation, scoring, quality measures, and the data available now to prepare.
Beginning January 2027, cardiologists in selected geographic regions will face mandatory participation in the Ambulatory Specialty Model—a five-year test of financial accountability for specialist-managed heart failure care. This summary covers the model's core structure and the data available today to begin preparation.
For comprehensive analysis: This is a practical summary for cardiologists. For the full deep dive into ASM design, scoring mechanics, and strategic implications, see The Ambulatory Specialty Model Explained. For the Low Back Pain cohort, see ASM for Low Back Pain Specialists.
February 2026: CMS has published the preliminary participant list—2,610 cardiologists identified in the Heart Failure cohort. Search the list by name, NPI, or organization →
WHAT THIS COVERS
01 | Why CMS Created ASM—Built on MIPS MVP Foundation
Specialists manage most of Medicare's chronic disease spending, yet have largely operated outside accountability structures. Heart failure, in particular, drives significant costs—hospitalizations, emergency care, imaging, and care coordination across multiple providers. Together, heart failure and low back pain account for roughly 6% of Medicare Parts A and B spending.
ASM addresses this directly by introducing mandatory participation, peer-relative scoring, and financial risk tied to both quality and total episode costs. The model is built on infrastructure CMS has been testing through MIPS Value Pathways (MVPs) for years—which means the data and measurement methodology are not new.
The practical implication: You don't need to wait for ASM to launch to understand your baseline position. The episode-based cost data CMS uses for ASM scoring is available today through MIPS reporting. Practices can analyze their heart failure episode costs, quality performance, and patient population now using data that already exists.
02 | Geographic and Specialty Participation
CMS randomly selected approximately 235 geographic areas (roughly 25% of Core-Based Statistical Areas nationwide) for mandatory ASM participation. The selection was stratified by spending levels and episode volume to ensure representation across diverse cost environments.
For heart failure: Cardiologists in mandatory areas whose patient populations meet volume thresholds must participate. Check if your area is included →
To face payment adjustments, you must treat at least 20 attributed heart failure episodes during the performance year. Attribution requires billing at least 30% of the Part B services within that episode. CMS determines your eligible specialty based on the code used most frequently on your Medicare Part B claims.
03 | How Scoring and Payment Adjustments Work
Each ASM participant receives a composite score from 0–100 that determines payment adjustments two years later. The score combines:
- Quality (50%): Performance on heart failure measures scored by decile
- Cost (50%): Episode-based costs benchmarked against other cardiologists in your region
- Improvement Activities (−20 points maximum penalty): Requirements for primary care coordination
- Promoting Interoperability (−10 points maximum penalty): Health information exchange requirements
A critical difference from MIPS: Benchmarks are calculated from actual ASM participant performance each year, not historical data. You compete against peers in real time, with payment outcomes depending entirely on relative performance. There is no fixed threshold—no "passing grade"—only your position relative to other cardiologists in your region.
Practices with 15 or fewer clinicians receive a +10% adjustment to their score; solo practitioners receive +15%, helping offset downside risk for smaller practices.
Payment Adjustments Scale Over Time
| Performance Year | Payment Adjustment | Payment Year |
|---|---|---|
| 2027 | ±9% | 2029 |
| 2028–2029 | ±9% | 2030–2031 |
| 2030 | ±10% | 2032 |
| 2031 | ±12% | 2033 |
Adjustments apply to all Medicare Part B services you provide in the payment year. Unlike MIPS, ASM is not budget-neutral—CMS retains 15% of the incentive pool before redistribution, structurally ensuring the model generates savings.
04 | Heart Failure Quality Measures and Episode-Based Cost Measurement
Required Heart Failure Quality Measures
ASM uses fixed measure sets for heart failure. You report on all measures, not a selection:
| Measure ID | Measure | What It Assesses |
|---|---|---|
| Q492 | Risk-Standardized Acute Unplanned CV Admission Rates | Are HF patients being hospitalized for preventable CV events? |
| Q008 | HF: Beta-blocker Therapy for LV Systolic Dysfunction | Are HFrEF patients receiving guideline-directed beta-blocker therapy? |
| Q005 | HF: ACE Inhibitor/ARB/ARNI Therapy for LV Systolic Dysfunction | Are patients receiving guideline-directed medical therapy? |
| Q236 | Controlling High Blood Pressure | Is blood pressure controlled in your HF population? |
| Q377 | Functional Status Assessments for Heart Failure | Are you collecting patient-reported functional status? |
These measures are identical to those available today through MIPS MVP reporting. Understanding your performance on Q008, Q005, and Q236 now—using MIPS data—tells you exactly how you'll be scored under ASM.
Episode-Based Cost Measurement
Your cost score reflects total Medicare spending for heart failure episodes you manage—not just your direct billing. This includes:
- Hospitalizations and emergency department visits
- Post-acute care and skilled nursing facilities
- Imaging and diagnostic testing
- Services from other specialists and providers
Costs are risk-adjusted for patient health status and compared to other cardiologists in your region. A clinician treating a sicker population receives a higher expected cost threshold.
The data is available now. CMS calculates episode-based costs for MIPS participants today. These are the exact episodes and cost calculations that will determine your ASM score. Review the cost methodology →
05 | Primary Changes to Practice Operations
ASM introduces two new operational requirements that many practices will need to develop:
Primary Care Coordination
For each ASM patient, confirm they have access to a primary care provider. If not, help them find one. After each visit, communicate relevant clinical information to their PCP. Help ensure patients receive annual health-related social needs screening (addressing food insecurity, housing, transportation, utilities, safety).
Collaborative Care Arrangements
Establish at least one formal arrangement with a primary care practice treating shared patients. The arrangement must include at least 3 of these 5 elements:
- Structured data sharing
- Co-management protocols
- Transitions-of-care processes
- Closed-loop referral communication
- Integrated care coordination
These requirements reflect CMS's intent to test whether specialists can function as part of a coordinated care team. They require operational changes—workflows for communication, protocols for shared management, systems for tracking patient needs—that most practices need to build intentionally.
See the ASM Preparation Guide for specific action steps →
06 | Data Available Now to Understand Your Position
The episode-based cost data, quality performance metrics, and risk adjustment methodology used in ASM are calculated today through MIPS. This means:
- Your heart failure episode costs are already measured and available
- Your performance on Q008, Q005, and Q236 is quantified
- Your risk-adjusted benchmarking position versus peers is calculable
- Your patient population's readmission rates and chronic disease management gaps are identifiable
Using this data requires infrastructure. To effectively analyze episode costs, segment your population by cost and acuity, understand which patients are driving utilization, and model the impact of care changes, practices typically need access to patient-level episode data, population health analytics, and cost scenario modeling.
A unified platform that integrates MIPS reporting, MVP data, episode-based cost analysis, patient population segmentation, and quality measurement reduces this burden and enables deeper insight. VBCA's platform consolidates these functions into one system, allowing practices to see their performance across all dimensions simultaneously.
Our Take
ASM represents a fundamental shift in how CMS expects specialists to operate. The model isn't asking whether specialists can treat disease better—it's testing whether financial accountability can align specialist incentives with system-wide cost management.
For cardiologists, this means episode cost performance depends on decisions that extend far beyond your direct care. The 30-day readmission rate affects both your quality score and your cost score. Whether a patient receives guideline-directed therapy affects quality. Whether a patient is hospitalized unnecessarily affects total episode cost. These are interconnected outcomes that require coordinated approaches to chronic disease management.
The data needed to understand your position already exists. The barrier isn't data availability—it's translating that data into actionable insight and operational change. Practices that begin this work now, during the preparation year, will understand their cost drivers, care gaps, and performance baseline before measurement begins. Those that wait until 2027 will be learning these lessons while already facing payment adjustments.
Next Steps
SOURCES