Principal diagnosis missing or invalid
The first-listed diagnosis is missing, not valid for the date of service, or not specific enough.
Usual causes
- Diagnosis field blank or pointer missing on the service line.
- Truncated or retired ICD-10 code.
- Header code (a category that needs more characters) used as the principal diagnosis.
The fix
Code the documented condition to the highest specificity valid for the date of service and send a corrected claim.
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.
MA63 in short
What does MA63 mean?
The first-listed diagnosis is missing, not valid for the date of service, or not specific enough. The official X12 text reads: "Missing/incomplete/invalid principal diagnosis."
What usually causes a MA63 denial?
Diagnosis field blank or pointer missing on the service line. Truncated or retired ICD-10 code. Header code (a category that needs more characters) used as the principal diagnosis.
How do I fix MA63?
Code the documented condition to the highest specificity valid for the date of service and send a corrected claim.
Should I appeal MA63 or send a corrected claim?
Corrected claim. Corrected claim.
What deadline applies to MA63?
Timely filing limit.