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ICD-9-CM diagnosis code (retired)

659.51 — Elderly primigravida, 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 659.51

659.51 is an ICD-9-CM diagnosis code for elderly primigravida, 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 O09.511 (Supervision of elderly primigravida, first trimester), O09.512 (Supervision of elderly primigravida, second trimester) and O09.513 (Supervision of elderly primigravida, third trimester). All of these are approximate matches, so review the record to pick the right one.

ICD-10-CM equivalents

Common questions about 659.51

What is the ICD-10 code for ICD-9 659.51?

The GEMs map 659.51 to ICD-10-CM O09.511, O09.512 and O09.513.

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.