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ICD-9-CM diagnosis code (retired)

V91.01 — Twin gestation, monochorionic/monoamniotic (one placenta, one amniotic sac)

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 V91.01

V91.01 is an ICD-9-CM diagnosis code for twin gestation, monochorionic/monoamniotic (one placenta, one amniotic sac). 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 one ICD-10-CM code, O30.019 (Twin pregnancy, monochorionic/monoamniotic, unspecified trimester). The match is approximate, so confirm it against the record.

ICD-10-CM equivalents

Common questions about V91.01

What is the ICD-10 code for ICD-9 V91.01?

The GEMs map V91.01 to ICD-10-CM O30.019.

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.