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ICD-9-CM diagnosis code (retired)

675.21 — Nonpurulent mastitis associated with childbirth, 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 675.21

675.21 is an ICD-9-CM diagnosis code for Nonpurulent mastitis associated with childbirth, 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 3 ICD-10-CM codes, such as O91.211 (Nonpurulent mastitis associated with pregnancy, first trimester), O91.212 (Nonpurulent mastitis associated with pregnancy, second trimester) and O91.213 (Nonpurulent mastitis associated with pregnancy, third trimester). All of these are approximate matches, so review the record to pick the right one.

ICD-10-CM equivalents

Common questions about 675.21

What is the ICD-10 code for ICD-9 675.21?

The GEMs map 675.21 to ICD-10-CM O91.211, O91.212 and O91.213.

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.