Michigan GPCI Values

Geographic Practice Cost Index (GPCI) values for Michigan (MI). GPCIs adjust Medicare physician payments to reflect local cost differences.

Based on CMS Physician Fee Schedule GPCI data

Work GPCI
1.000
At national floor (1.000)
Practice Expense GPCI
0.949
5.1% below national
Malpractice GPCI
1.127
12.7% above national

Michigan GPCI by Locality

LocalityWork GPCIPE GPCIMP GPCI
Detroit1.0000.9901.462
Rest of Michigan1.0000.9080.792

Example: How Michigan GPCIs Affect Payment

Here is an example calculation for CPT 99214 (Established Patient Office Visit, Level 4) in Michigan using statewide average GPCIs:

ComponentNational RVUMI GPCIAdjusted RVU
Work RVU1.921.0001.9200
Practice Expense RVU1.560.9491.4804
Malpractice RVU0.291.1270.3268
Total3.77--3.7273

Estimated Michigan Medicare Payment for 99214: 3.7273 x $32.74 (conversion factor) = $122.03(-1.1% vs. national average of $123.43)

What Are GPCIs?

The Geographic Practice Cost Index (GPCI) is a set of three adjustment factors used by CMS to modify Medicare physician payments based on geographic differences in the cost of practicing medicine. Every Medicare locality has its own set of GPCI values.

Work GPCI

Adjusts the work RVU based on local physician earnings. Most states have a floor of 1.000.

PE GPCI

Adjusts the practice expense RVU based on local rents, wages, equipment, and supply costs.

MP GPCI

Adjusts the malpractice RVU based on local professional liability insurance premiums.

About Michigan: Detroit has among the highest malpractice GPCIs in the nation.

Medicare Payment Formula

CMS calculates Medicare physician payment using this formula:

Payment = [(Work RVU x Work GPCI) + (PE RVU x PE GPCI) + (MP RVU x MP GPCI)] x Conversion Factor

The 2026 Medicare conversion factor is $32.74. This single dollar amount is multiplied by the GPCI-adjusted total RVU to determine the Medicare Allowed Amount for each service.

GPCI values shown are representative averages based on CMS data. Actual values vary by specific Medicare locality. Always verify with the official CMS Physician Fee Schedule for billing purposes. wRVU Tracker is for reference only.