Social Security number missing or invalid
A Social Security number the payer requires (usually for a Medicare Secondary Payer or Medicaid claim) is missing or does not match.
Usual causes
- Field left blank on a claim type that still requires it.
- Transposed digits.
The fix
Verify the number with the patient and resend the claim. Most claims no longer need an SSN; check whether the payer truly requires it before sending it.
Appeal or corrected claim?
Corrected claim.
Deadline to watch
Timely filing limit.
Exact limits are in your payer contract or provider manual. When in doubt, send the correction or appeal this week.
MA61 in short
What does MA61 mean?
A Social Security number the payer requires (usually for a Medicare Secondary Payer or Medicaid claim) is missing or does not match. The official X12 text reads: "Missing/incomplete/invalid social security number."
What usually causes a MA61 denial?
Field left blank on a claim type that still requires it. Transposed digits.
How do I fix MA61?
Verify the number with the patient and resend the claim. Most claims no longer need an SSN; check whether the payer truly requires it before sending it.
Should I appeal MA61 or send a corrected claim?
Corrected claim. Corrected claim.
What deadline applies to MA61?
Timely filing limit.