PlainProcedure Guide
Why Healthcare Costs Vary by State
The same medical procedure pays differently from state to state. Here is how geographic adjustments work, and what drives the gap.
The short answer
Medicare pays 204% more per procedure in California than in Puerto Rico, the widest gap in the national data. The Geographic Practice Cost Index (GPCI) is the primary mechanism -- it adjusts base payments for local wages, rents, and malpractice insurance costs.
- California (+25%)
- highest-paying state, vs. national avg
- Puerto Rico (-59%)
- lowest-paying state, vs. national avg
- 204%
- gap, highest vs. lowest state
Source: CMS Medicare Physician & Other Practitioners, 2023. Cost index = state's volume-weighted average Medicare payment ÷ the national volume-weighted average, ×100.
The 10 states with the highest volume-weighted average Medicare payment, indexed to the national average (100).
Medicare cost index by state (top 10)
Source: CMS Medicare Physician & Other Practitioners dataset, 2023 Volume-weighted by total Part B services per state
The Geographic Practice Cost Index (GPCI)
When CMS calculates Medicare payments, it doesn't pay the same rate everywhere. It applies a Geographic Practice Cost Index (GPCI) to each of the three components of the Relative Value Unit calculation:
- Physician Work GPCI - Adjusts for local physician wages and cost of living. Congress mandates a floor of 1.0 for all rural areas.
- Practice Expense GPCI - Adjusts for local office rents, non-physician staff wages, and equipment costs. This component has the widest variation between areas.
- Malpractice GPCI - Adjusts for local malpractice insurance premium differences, which vary enormously by state and specialty.
CMS updates GPCI values every 3–5 years based on Bureau of Labor Statistics wage data, rental surveys, and medical malpractice insurance databases. A GPCI of 1.0 represents the national average, values above 1.0 increase payments and values below 1.0 decrease them.
States with the Highest and Lowest Medicare Payments
The table below shows each state's actual volume-weighted average Medicare payment, indexed relative to the national average (100 = national average). States above 100 pay more than average; states below 100 pay less.
| State | Cost Index | vs. National Avg | Providers Tracked |
|---|---|---|---|
| California | 125 | +25% | 15,736 |
| Florida | 115 | +15% | 13,744 |
| New York | 113 | +13% | 10,699 |
| Maryland | 112 | +12% | 4,071 |
| Texas | 109 | +9% | 11,933 |
| Arizona | 103 | +3% | 3,922 |
| National Average | 100 | – | – |
| Maine | 54 | -46% | 512 |
| North Dakota | 54 | -46% | 442 |
| Vermont | 47 | -53% | 211 |
| Puerto Rico | 41 | -59% | 685 |
Source: CMS Medicare Physician & Other Practitioners dataset, 2023 Cost index is volume-weighted by total Part B services per state; GPCI itself is not published per-state by CMS, this index is derived directly from actual payment data
Provider Density and Market Competition
Beyond GPCI adjustments, the number of providers in a market significantly affects costs. Research by the Dartmouth Institute for Health Policy shows that regions with more specialists and hospital beds tend to deliver more services per patient, not necessarily because patients are sicker, but because supply drives its own demand in healthcare markets.
Conversely, markets with concentrated hospital systems (few competing hospitals) often have higher prices because insurers and Medicare lack negotiating leverage. Rural areas may have lower Medicare rates due to GPCI adjustments, but limited provider choice means patients may travel hundreds of miles for specialized care.
State-Level Regulations That Affect Costs
State regulations create additional cost variation beyond what CMS controls through the GPCI:
- Certificate-of-need (CON) laws - 35 states require state approval before hospitals can add beds, services, or equipment. CON laws reduce supply and can maintain high prices by limiting competition.
- Scope-of-practice laws - States that allow nurse practitioners and physician assistants to practice independently have higher provider supply and often lower costs for routine services.
- Malpractice tort reform - States with damage caps (Texas, California) have lower malpractice insurance premiums and, consequently, lower GPCI practice cost values. High-liability states like New York have the opposite effect.
- Medicaid expansion - States that expanded Medicaid under the ACA shifted some low-income patients from charity care to reimbursed care, affecting hospitals' financial structures and indirectly influencing cost allocation.
What This Means for Patients
For Medicare beneficiaries, the 20% coinsurance scales directly with the Medicare payment, so a procedure that costs $1,620 in Louisiana might cost $2,340 in California for the same 20% coinsurance. Over a year of multiple procedures, these differences accumulate significantly.
For elective procedures with significant geographic variation, some patients choose "medical tourism" within the US, traveling to lower-cost regions for major surgeries. This practice is especially common for spinal fusion, joint replacement, and other high-cost elective procedures.
Explore cost variation for any procedure across all states by visiting our state comparison pages, or search for a specific procedure to see how prices differ.
Is High Cost the Same as High Quality?
Research consistently shows that geographic cost variation does not track with quality of care. The Dartmouth Atlas Project found that Medicare spending in Miami is roughly twice that of Minneapolis, but patient outcomes are not significantly better in Miami. High-spending areas often have more hospitalizations and specialist visits, but not proportionally better survival rates or patient satisfaction scores.
This suggests that much of the geographic variation in Medicare costs reflects local practice patterns, supply-side incentives, and pricing power, not patient needs or care quality. Being in a higher-cost state does not guarantee better care.
Frequently Asked Questions
Why does Medicare pay different amounts in different states?
Medicare adjusts payments using the Geographic Practice Cost Index (GPCI), which reflects local differences in wages, office rents, and malpractice insurance costs. Providers in high-cost areas like Manhattan or San Francisco receive significantly higher payments than providers in rural Mississippi or Wyoming, even for identical procedures.
Which states have the highest Medicare procedure costs?
States with the highest average Medicare payments per procedure include Alaska, California, New York, New Jersey, and Hawaii. These states have high labor costs and high costs of doing business, which push up the practice expense and work components of the GPCI adjustment. Alaska often ranks highest due to extreme geographic isolation.
Which states have the lowest Medicare procedure costs?
States with the lowest average Medicare payments include Mississippi, Alabama, Arkansas, Montana, and Wyoming. These states have lower labor costs and lower overhead expenses for medical practices, resulting in lower GPCI-adjusted payments across most procedure categories.
Does price variation affect care quality?
Geographic variation in Medicare payments does not necessarily reflect differences in care quality. Research from Dartmouth Atlas shows that high-spending regions do not consistently produce better health outcomes than low-spending regions. Cost variation is primarily driven by supply-side factors like provider density and local economic conditions, not patient outcomes.
If I live in a low-cost state, can I save money by staying local?
For elective procedures, receiving care in a lower-cost region can significantly reduce out-of-pocket costs, especially for patients paying the 20% Medicare coinsurance, which scales with the procedure payment. However, travel costs, access to specialists, and continuity of care are important countervailing factors to consider.
How does state regulation affect healthcare costs?
State regulations affect costs in several ways: certificate-of-need (CON) laws limit hospital expansion (reducing competition), scope-of-practice laws determine which providers can bill independently, and state malpractice tort laws influence liability insurance premiums. All of these flow through to GPCI calculations and overall procedure costs.
What this means for you
Geography moves the price of the exact same procedure -- worth knowing before you assume a bill is out of line.
- California pays the most nationally (index 125); if you're comparing a bill against a "typical" price, adjust for where you are first. See the full state ranking
- Puerto Rico pays the least (index 41) -- a 204% gap from California, entirely from where the provider is located, not what was done.
- For an elective procedure, checking a lower-cost state's price before committing can be worth the trip -- your 20% Medicare coinsurance scales with the payment amount. How to negotiate a medical bill
Cost index reflects the actual volume-weighted average Medicare payment per state, not CMS's published GPCI factors directly -- the two track closely but are not identical.
This guide is for informational and educational purposes only. Cost index figures are approximations derived from CMS GPCI data. Individual procedure costs vary by provider, location, and year. Consult your provider for specific cost estimates.