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MA105 Remark Code (Deactivated): Provider No. for Location

MA105 meant the provider number reported was missing, incomplete, or invalid for the place of service on the claim. X12 deactivated it without naming a replacement; service facility remarks such as N293 cover similar problems now.

X12 deactivated RARCMA105 on June 2, 2005. Payers should no longer use it on new remittances, but it can still appear on older ERAs, corrected claims, and appeals.

Code: MA105 (RARC MA105)
Status: Deactivated StoppedJune 2, 2005 (in use since January 1, 1997).
Code set: Remittance Advice Remark Codes (RARC)
Group codes: CO (Contractual Obligation): Paired with CO adjustments; the provider had to report a number valid for that location.
Official description: Missing/incomplete/invalid provider number for this place of service.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified: September 24, 2026 against the official X12 list.

What MA105 meant

Remark MA105 said the provider number on the claim did not fit the place of service. Under the older numbering systems, a provider could have separate numbers for each location or setting, and the payer rejected claims when the number did not match where the service was performed.

What replaced it

X12 did not name a successor. Location-related identifier problems are now typically flagged with N293 for the service facility identifier or N294 for its address, and with N290 when the rendering provider’s identifier is the issue.

If you still see MA105

It is only in older data. For a current location mismatch, confirm the service facility information on the claim and check that the rendering provider is enrolled at that location with the payer. Add the location to enrollment if needed, then resubmit.

N293 (Missing/incomplete/invalid service facility primary identifier.): Missing, incomplete, or invalid service facility primary identifier.
N294 (Missing/incomplete/invalid service facility primary address.): Missing, incomplete, or invalid service facility primary address.
N290 (Missing/incomplete/invalid rendering provider primary identifier.): Missing, incomplete, or invalid rendering provider primary identifier.

MA105 FAQ

Why would a provider number depend on the place of service?

Before NPIs, providers could hold different payer-assigned numbers for different practice locations. The number had to match the location where care was given.

Can a similar problem happen with NPIs?

Yes. A provider's enrollment may be tied to specific practice locations, and billing for a location that is not enrolled can lead to rejections.

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