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MA112 Remark Code: Group Practice Information Invalid

MA112 means the group practice information on the claim was missing, incomplete, or invalid. For services billed by a group, the payer needs the group's identifier and details to match the claim to the right enrolled entity.

Quick facts

Code
MA112 (RARC MA112)
Status
Active In use since January 1, 1997; last modified February 28, 2003.
Code set
Remittance Advice Remark Codes (RARC)
Group codes
  • CO (Contractual Obligation): The claim was not processed because the group information was defective. The provider corrects it; the patient is not billed.
Official description
Missing/incomplete/invalid group practice information.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What MA112 means

When a group practice bills, the claim identifies the group as the billing provider and an individual as the rendering provider. MA112 says the group practice information was missing, incomplete, or invalid. The payer could not match the claim to an enrolled group, or could not confirm the rendering provider belongs to it.

It usually comes with CARC 16.

Common causes

  • The group NPI in item 33a is not enrolled with the payer or is enrolled under a different address.
  • The rendering provider in item 24J has not been linked (reassigned) to the group.
  • The group’s name or address on the claim does not match enrollment records.
  • A new location was added but never enrolled.

How to fix it

  1. Check enrollment for the group and the rendering provider, including their link to each other.
  2. Correct item 33/33a so the group’s name, address, and NPI match enrollment.
  3. Verify the rendering NPI in item 24J.
  4. Resubmit, using resubmission code 7 with the original claim number in item 22 if replacing a processed claim.

How to prevent it

  • Update payer enrollment whenever providers join or locations change.
  • Keep a master list of NPIs, addresses, and reassignments for each payer.
  • For more, see provider enrollment denials.

Codes that may appear with MA112

  • CO-16 (Claim/service lacks information or has submission/billing error(s).): The claim is missing information needed for adjudication, here group practice details.
  • CO-208 (National Provider Identifier - Not matched.): The NPI submitted did not match payer records.
  • N257 (Missing/incomplete/invalid billing provider/supplier primary identifier.): The billing provider's primary identifier was missing or invalid.
  • N290 (Missing/incomplete/invalid rendering provider primary identifier.): The rendering provider's identifier was missing or invalid.
  • N256 (Missing/incomplete/invalid billing provider/supplier name.): The billing provider or supplier name was missing or invalid.

MA112 FAQ

Where does group practice information go?

On the CMS-1500, the billing provider (often the group) is in item 33 with its NPI in 33a. The rendering provider's NPI goes in item 24J.

Why would group information be invalid?

Common reasons are a group NPI that is not enrolled with the payer, a mismatch between the group's name, address, and records, or a rendering provider not linked to the group.

Do solo providers get MA112?

It is less likely, but it can happen if a solo provider bills as a group or reports a group identifier that is not enrolled.