Bridging the Coverage Gap: State Medicaid Limitations for Cardiac Rehabilitation Programs and the Risk to Disadvantaged Communities

This study reveals significant state-by-state disparities in Medicaid coverage for cardiac rehabilitation, highlighting that the lack of standardized reimbursement—particularly in Southern states with high Medicaid enrollment—creates systemic barriers that disproportionately disadvantage vulnerable populations and undermine health equity.

The Gist

Imagine your heart is like the engine of a very important car. When that engine gets damaged (a condition called Heart Failure), it doesn't just stop working; it sputters, leaks, and eventually breaks down completely, costing a fortune to fix or replace.

Cardiac Rehabilitation (CR) is like a high-tech, personalized mechanic's workshop. It's a proven program where patients exercise under supervision to strengthen their heart. Studies show that if you go to this "workshop," your engine is 25–30% less likely to fail completely, and you are much less likely to need expensive emergency repairs (hospital stays).

The Problem: The "Insurance Map"

Now, imagine you have a special coupon (Medicaid) that pays for car repairs if you are low-income. You would think this coupon would cover the mechanic's workshop, right?

Not necessarily.

This paper is like a detective report that looked at the "coupon rules" in all 50 states. They discovered a chaotic patchwork of rules:

• In some states (mostly in the North and West), the coupon covers the full workshop, including the fancy heart-monitoring equipment.
• In other states (mostly in the South and parts of the Mountain West), the coupon says, "Sorry, we don't pay for the workshop at all."

The "No-Go" Zones

The authors found that in states like Arkansas, Louisiana, Mississippi, Georgia, Nevada, Utah, and Iowa, the Medicaid coupon is essentially blank when it comes to this specific heart repair program.

Think of it like this: If you live in a city where the roads are full of potholes (high rates of heart disease), you would expect the city to build the best bridges to get you across. But in these "No-Go" states, the government is saying, "We know your car is broken, and we know the mechanic can fix it, but we won't pay for the mechanic's visit."

Who Gets Hurt the Most?

This isn't just a policy mix-up; it's a fairness issue.

• The Vulnerable: The people who rely on Medicaid are often the poorest, live in rural areas, or are from minority communities. They are the ones who need the heart workshop the most because they often get heart disease earlier and more severely.
• The Double Whammy: In many of these states, the people who need help the most are the ones who are told, "You have to pay out of your own pocket," even though they have no money. It's like telling a person with a broken leg to walk to the hospital because the ambulance service doesn't cover that neighborhood.

Why This Matters (The Cost)

The paper argues that not paying for this workshop is actually wasting money.

• The Math: For every $1 spent on the heart workshop, the system saves about $4 later because the patient doesn't end up in the expensive emergency room.
• The Analogy: It's like refusing to buy a $50 tune-up for a car, only to have the engine blow up later, costing $5,000 to replace. By not covering the rehab, states are saving pennies today while spending dollars tomorrow.

The Solution

The authors suggest a few simple fixes to make the system fair:

1. One Rule for All: The federal government should tell all states, "You must cover this heart workshop for everyone." No more guessing games.
2. Virtual Mechanics: Since many people live far from clinics, we should pay for tele-rehab (doing the exercises at home with a doctor watching via video). This is like having a mechanic come to your driveway instead of making you drive a broken car to the shop.
3. Pay for Results: Instead of paying for every single visit, insurance should pay hospitals for keeping patients healthy long-term.

The Bottom Line

Heart failure is a silent killer that hits the poor and disadvantaged the hardest. Cardiac rehabilitation is a life-saving tool that works, but right now, you can only use it if you live in the right zip code. This paper is a call to fix the map so that a person's heart health doesn't depend on their address.

Technical Summary

1. Problem Statement

Heart Failure (HF) is a growing public health crisis in the United States, projected to affect over 11.4 million adults by 2050 with annual costs exceeding $160 billion. Cardiac Rehabilitation (CR) is a highly cost-effective, evidence-based intervention that reduces all-cause mortality by 25–30% and hospital readmissions by up to 31%.

Despite these benefits, CR utilization remains abysmally low among Medicaid enrollees. The core problem identified is the lack of standardized Medicaid coverage for outpatient CR services across the 50 U.S. states. While the Centers for Medicare & Medicaid Services (CMS) approved CR for stable HF patients in 2014, individual state Medicaid programs retain administrative discretion, creating a "patchwork" of coverage. This policy variability systematically excludes low-income, rural, and minority populations—groups that already bear the highest burden of cardiovascular disease—from accessing life-saving secondary prevention care.

2. Methodology

The authors conducted a cross-sectional policy analysis of all 50 U.S. states to evaluate Medicaid reimbursement for outpatient CR services.

• Target Services: The study focused on two specific Current Procedural Terminology (CPT) codes:
  • 93797: Supervised exercise therapy without continuous ECG monitoring.
  • 93798: Supervised exercise therapy with continuous ECG monitoring (critical for higher-risk HF patients).
• Data Collection:
  • Primary Source: Review of publicly available Medicaid fee schedules, provider manuals, and reimbursement documents on official state websites.
  • Verification: Direct communication (phone interviews) with state Medicaid agencies to clarify ambiguous, outdated, or missing documentation.
• Classification System: States were categorized into three groups:
  1. Full Coverage: Reimbursement for both CPT 93797 and 93798.
  2. No Coverage: No evidence of reimbursement for either code.
  3. Partial/Inconclusive: Coverage for only one code or status that could not be confirmed.
• Geographic Analysis: The study utilized heat maps to visualize coverage disparities and correlated these with state-level Medicaid enrollment data (as of December 2024) and Affordable Care Act (ACA) expansion status.

3. Key Contributions

• Comprehensive State-Level Mapping: This is one of the first studies to provide a granular, state-by-state breakdown of Medicaid CR coverage specifically for the two primary billing codes.
• Linking Policy to Equity: The paper explicitly connects Medicaid coverage gaps to social determinants of health (SDOH), highlighting how policy decisions disproportionately impact Black Americans, rural populations, and low-income individuals who rely on Medicaid as their primary insurance.
• Economic Argument: It reinforces the economic case for CR, citing a return of approximately $4 for every $1 invested through reduced hospitalizations, arguing that current coverage gaps are fiscally shortsighted.

4. Key Results

The analysis revealed significant geographic and policy disparities:

• Coverage Gaps:
  • CPT 93797 (No ECG): Only 41 states provided full coverage. 8 states offered no coverage (Arkansas, Georgia, Iowa, Louisiana, Mississippi, Nevada, New Jersey, Utah). Kansas was classified as inconclusive.
  • CPT 93798 (With ECG): Only 43 states provided coverage. 7 states offered no coverage (the same as above, excluding Iowa and New Jersey, but including Kansas as inconclusive).
• Geographic Clustering:
  • States with no coverage are predominantly located in the South (Arkansas, Georgia, Louisiana, Mississippi) and the Mountain West (Utah, Nevada).
  • States with full coverage are concentrated in the Northeast, Upper Midwest, and West Coast.
• The "Double Burden" Phenomenon:
  • States with the highest Medicaid enrollment rates (e.g., Louisiana, Arkansas, Mississippi) often provided no CR coverage.
  • Conversely, states with high enrollment like New York and California provided full coverage.
  • There is a strong correlation between non-ACA expansion states and the lack of CR coverage, despite these regions having higher rates of HF prevalence and mortality.
• Specific Disparities: Five of the eight states with no coverage for CPT 93797 (Arkansas, Georgia, Louisiana, Mississippi, Utah) also lacked coverage for the more intensive CPT 93798, leaving high-risk patients in these regions with zero access to monitored rehabilitation.

5. Significance and Implications

• Health Equity Crisis: The lack of standardized coverage acts as a systemic barrier, exacerbating racial and socioeconomic disparities in cardiovascular outcomes. Black Americans, who are nearly twice as likely to develop HF before age 65, are disproportionately denied access to CR in non-coverage states.
• Clinical Impact: In non-coverage states, clinicians are unable to offer guideline-recommended care, leading to higher rates of preventable hospital readmissions and mortality among the most vulnerable populations.
• Policy Recommendations: The authors propose five actionable steps:
  1. Federal Standardization: Mandate Medicaid coverage for CPT 93797 and 93798 across all states.
  2. Tele-Rehabilitation: Expand coverage for remote/home-based CR to overcome transportation and geographic barriers.
  3. Value-Based Care: Incorporate CR into Medicaid value-based incentives to reward long-term outcomes.
  4. Provider Education: Improve referral rates, particularly in minority-serving and rural institutions.
  5. CMS Guidance: Issue direct federal guidance to ensure uniform CR inclusion in all Medicaid programs.

Conclusion: The study concludes that the current variability in Medicaid CR coverage is a critical failure of health equity. Aligning state policies to ensure universal access—potentially through tele-rehabilitation and value-based models—is essential to reducing hospitalizations, improving survival rates, and addressing the economic burden of Heart Failure in the United States.