2026 ICD-10-CM Diagnosis Code O34.70Maternal care for abnormality of vulva and perineum, unspecified trimester

ICD-10-CM Codes›O00-O9A›O30-O48›O34

ICD-10-CM O34.70
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O34.70 is a billable ICD-10-CM diagnosis code for maternal care for abnormality of vulva and perineum, unspecified trimester. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 817 through 819, 831 through 833. The code is restricted by the Medicare Code Editor to maternity cases (age 9 through 64). Coders also document this condition as congenital anomaly of mother complicating pregnancy. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Maternal care for abnormality of pelvic organs.

Code Identity

ICD-10-CM Code
O34.70
Billable Status
Yes — Valid for Submission
Code Describes
Maternal care for abnormality of vulva and perineum, unspecified trimester
Short Description
Maternal care for abnlt of vulva and perineum, unsp tri
Parent Code
O34.7
Maternal care for abnormality of vulva and perineum

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO30-O48Maternal care related to the fetus and amniotic cavity and possible delivery problems
CategoryO34Maternal care for abnormality of pelvic organs
This CodeO34.70Maternal care for abnormality of vulva and perineum, unspecified trimester

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O34.70.

Maternity diagnoses
The Medicare Code Editor detects inconsistencies in maternity cases by checking a patient's age and any diagnosis on the patient's record. The maternity code edits apply to patients age ange is 9–64 years inclusive (e.g., diabetes in pregnancy, antepartum pulmonary complication).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Congenital anomaly of mother complicating pregnancy
  • Congenital anomaly of vulva in mother complicating pregnancy
  • Disorder of vulva in pregnancy, childbirth, and/or puerperium
  • Fibrosis of perineum affecting pregnancy
  • Finding of tone of female perineum
  • Neoplasm of vulva affecting pregnancy
  • Previous surgery to perineum AND/OR vulva affecting pregnancy
  • Rigid perineum
  • Rigid perineum affecting pregnancy
  • Rigid perineum in pregnancy, childbirth, and/or puerperium

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR PRG017
Maternal care for abnormality of pelvic organs
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Health Problems in Pregnancy

A health problem in pregnancy is any disease or condition that could affect your health or the health of your fetus. Some health problems may make it more likely that you will have a high-risk pregnancy. A high-risk pregnancy is one in which you, your fetus, or both are at higher risk for health problems than in a typical pregnancy.

The full article covers:

  • What are health problems in pregnancy?
  • What raises my risk for health problems during pregnancy?
  • Can chronic health conditions cause problems in pregnancy?
  • Can health problems in pregnancy be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert O34.70 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
654.80 Abn vulva in preg-unspec
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About O34.70Overview

Is O34.70 (Maternal care for abnormality of vulva and perineum) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report maternal care for abnormality of vulva and perineum, unspecified trimester on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does O34.70 group to?

When maternal care for abnormality of vulva and perineum, unspecified trimester is the principal diagnosis on an inpatient stay, it groups to MS-DRG 817, 818, 819, 831, 832, 833, with relative weights from 0.5229 to 1.6880 depending on complications. Higher weights mean higher Medicare reimbursement.

Who can O34.70 be reported for?

The Medicare Code Editor checks maternal care for abnormality of vulva and perineum, unspecified trimester against patient demographics: this code is intended for maternity cases (age 9 through 64). Claims outside these limits are flagged as inconsistent.

What is the ICD-9 equivalent of O34.70?

Under the General Equivalence Mappings, maternal care for abnormality of vulva and perineum, unspecified trimester converts to ICD-9-CM 654.80 (abn vulva in preg-unspec). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.