Guidelines › NEC and NOS

NEC and NOS

Official text from the FY2027 ICD-10-CM Official Guidelines for Coding and Reporting. The wording is quoted exactly.

Guidelines I.A.6

“When a specific code is not available for a condition, the Alphabetic Index directs the coder to the "other specified" code in the Tabular List.”

“This abbreviation is the equivalent of unspecified.”

Where this applies

This is a general rule. It applies to code assignment everywhere, not to one code or group of codes.

Source: FY 2027 ICD-10-CM Official Guidelines for Coding and Reporting, effective October 1, 2026. Full Guidelines (PDF, CMS)

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