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M74 Remark Code: Service Not Eligible for HPSA Bonus

M74 means the service does not qualify for a Health Professional Shortage Area (HPSA) or Physician Scarcity bonus. The base service may still be paid; only the incentive was withheld.

Quick facts

Code
M74 (RARC M74)
Status
Active In use since January 1, 1997; last modified December 2, 2004.
Code set
Remittance Advice Remark Codes (RARC)
Group codes
  • CO (Contractual Obligation): The bonus was not added. There is no patient liability for a bonus that was never allowed.
Official description
This service does not qualify for a HPSA/Physician Scarcity bonus payment.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What M74 means

Medicare’s shortage-area incentive adds a percentage bonus to physician professional services furnished in a designated Health Professional Shortage Area, and the retired Physician Scarcity program worked in a similar way. M74 tells you that the payer reviewed this service and decided the bonus does not apply. It is a narrow message: the underlying service is judged by its own CARC, and M74 explains only the missing incentive.

Where M73 says “rebill it as components and we can pay the bonus,” M74 says “this service is not eligible.”

Common causes

  • The ZIP code or address of the service location is not in a designated shortage area on the date of service.
  • The service is technical in nature, such as the technical component of a diagnostic test.
  • The shortage-area designation applies to a different discipline than the rendering provider’s (for example a mental health designation versus a primary care one).
  • The practice added a shortage-area modifier to a service the payer does not consider eligible.

What to do

  1. Check the service location against the current shortage-area designation for the relevant discipline.
  2. Confirm the service type is a professional service eligible for the incentive.
  3. If the location and service qualify, gather the designation details and ask the payer to reopen or reconsider the claim.
  4. If they do not qualify, no correction is needed; update any billing rule that added the modifier.

How to prevent it

  • Keep a list of which practice locations fall within designated shortage areas and for which disciplines.
  • Recheck designations periodically, because they are updated over time.
  • Avoid appending shortage-area modifiers automatically to every service at a location.

Provider and location setup issues are covered in the provider enrollment guide.

Codes that may appear with M74

  • CO-45 (Charge exceeds fee schedule/maximum allowable or contracted/legislated fee arrangement.): The service paid at its standard allowance without the incentive amount.
  • CO-B7 (This provider was not certified/eligible to be paid for this procedure/service on this date of service.): The provider was not eligible for the payment on the date of service, which can include incentive eligibility.
  • M73 (The HPSA/Physician Scarcity bonus can only be paid on the professional component of this service.): The bonus could apply but only to the professional component, so the service must be rebilled in parts.
  • MA114 (Missing/incomplete/invalid information on where the services were furnished.): Missing or invalid service location data, which can prevent the payer from recognising a shortage area.

M74 FAQ

Why would a service not qualify for the HPSA bonus?

Common reasons are that the service location is not in a designated shortage area for the date of service, the service is a technical component, or the provider type is not eligible for the incentive.

Does M74 reduce the regular payment?

No. It only explains that the bonus was not paid. Look at the CARC for any adjustment to the base amount.

Can I appeal M74?

If you believe the location or service qualified, you can request a reopening or appeal. Bring evidence of the shortage-area designation for the date of service.