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ICD-9-CM diagnosis code (retired)

664.21 — Third-degree perineal laceration, delivered, with or without mention of antepartum condition

ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.

About ICD-9-CM 664.21

664.21 is an ICD-9-CM diagnosis code for third-degree perineal laceration, delivered, with or without mention of antepartum condition. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.

The CMS General Equivalence Mappings translate it to 4 ICD-10-CM codes, such as O70.20 (Third degree perineal laceration during delivery, unspecified), O70.21 (Third degree perineal laceration during delivery, IIIa) and O70.22 (Third degree perineal laceration during delivery, IIIb). All of these are approximate matches, so review the record to pick the right one.

ICD-10-CM equivalents

Common questions about 664.21

What is the ICD-10 code for ICD-9 664.21?

The GEMs map 664.21 to ICD-10-CM O70.20, O70.21, O70.22 and O70.23.

GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.