Medicare Claims Processing Manual (Pub. 100-04), Ch. 14 § 40.2
Wage Adjustment of Base Payment Rates
40.2 - Wage Adjustment of Base Payment Rates
(Rev. 11793; Issued:01-19-23; Effective: 02-21-23; Implementation: 02-21-23)
Prior to January 1, 2008, the payment rates established for ASC procedures (see §30) are
standard base rates that have been adjusted to remove the effects of regional wage
variations. When contractors process claims for ASC services, they adjust the base rates
for services subject to geographic adjustment to reflect the wage index value applicable
to the area in which the ASC is located. The Medicare payment for ASC services is
equal to 80 percent of the wage-adjusted standard payment rate. Beneficiaries are
responsible for a 20 percent coinsurance payment for ASC services once their deductible
is satisfied. An exception to this is screening flexible sigmoidoscopies and screening
colonoscopies, regardless of the code that is billed for the establishment of a diagnosis as
a result of the test, or for the removal of tissue or other matter or other procedure, that is
furnished in connection with, as a result of, and in the same clinical encounter as the
colorectal cancer screening test. There is no deductible and the coinsurance will be
gradually reduced until it is completely waived for dates of service on or after January 1,
2030.
The wage index includes the wage and salary levels of certain health care professionals in
both urban and nonurban locations, compared to a national norm of 1.0. Areas with
above average wage levels have index numbers greater than 1.0, while areas with below
average wage levels have index numbers below l.0.
Each Core-Based Statistical Area (CBSA) within a State has a separate index. If a
specific city or county does not have a CBSA value, the default is to the overall state
wage index.
For dates of service on or after January 1, 2008, the ASC payment rates are
geographically wage adjusted based on the wage index for the CBSA. Beginning January
1, 2008, CMS calculates and makes available to the contractors CBSA-specific ASC
payment rates for services subject to geographic adjustment. The wage index values for
urban and rural areas that CMS applies to all non-acute providers are used in the
calculation of the ASC wage adjusted payment rates. With the implementation of the
ASC revised payment system, the labor related portion of the payment rate is 50 percent
and the remaining non-labor related portion is 50 percent.
There is no adjustment for geographic wage differences for the following:
• Corneal tissue acquisition;
• Drugs and devices that have pass-through status under the OPPS;
• Brachytherapy sources;
• Payment adjustment for NTIOLs; or
• Separately payable drugs and biologicals.