M81M-series (Medicare line-level)Missing Information
M81: Diagnosis not coded to highest specificity
The payer requires ICD-10 codes at their most specific level — an unspecified or parent-level code was billed where a more specific code exists.
Commonly appears with these denial codes
The denial code gives the category; M81 pinpoints the specific problem. Read them together before touching the claim.
What to do about it
Recode using the full character set (laterality, encounter type, severity). Query the provider if documentation doesn't support specificity.
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