2026 ICD-10-CM Diagnosis Code O34.29Maternal care due to uterine scar from other previous surgery

ICD-10-CM Codes›O00-O9A›O30-O48›O34

ICD-10-CM O34.29
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O34.29 is a billable ICD-10-CM diagnosis code for maternal care due to uterine scar from other previous surgery. 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 previous uterine surgical scar. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Maternal care for abnormality of pelvic organs.

Code Identity

ICD-10-CM Code
O34.29
Billable Status
Yes — Valid for Submission
Code Describes
Maternal care due to uterine scar from other previous surgery
Short Description
Maternal care due to uterine scar from oth previous surgery
Parent Code
O34.2
Maternal care due to uterine scar from previous surgery

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 CodeO34.29Maternal care due to uterine scar from other previous surgery

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O34.29.

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.

  • Previous uterine surgical scar
  • Scar of gravid uterus non-tender
  • Scarring of uterus
  • Uterine scar from previous surgery affecting pregnancy

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Maternal care due to uterine scar from other transmural uterine incision

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Delivery(childbirth) (labor)
      • cesarean (for)
        • previous
          • surgery (to)
            • uterus
    • Delivery(childbirth) (labor)
      • cesarean (for)
        • scar (s)
          • transmural uterine
    • Delivery(childbirth) (labor)
      • cesarean (for)
        • scar (s)
          • uterus
    • Delivery(childbirth) (labor)
      • cesarean (for)
        • transmural uterine scar
    • Scar, scarring
      • transmural uterine, in pregnancy
    • Scar, scarring
      • uterus
        • in pregnancy

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 O34.29 to ICD-9-CMHistory

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

ICD-9-CM
654.91 Abn pelv org NEC-deliver
Approximate The match is approximate rather than exact.
ICD-9-CM
654.93 Abn pelv org NEC-antepar
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 O34.29Overview

Is O34.29 (Maternal care due to uterine scar from previous surgery) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report maternal care due to uterine scar from other previous surgery on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does O34.29 group to?

When maternal care due to uterine scar from other previous surgery 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 O34.29 be reported for?

The Medicare Code Editor checks maternal care due to uterine scar from other previous surgery 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 O34.29?

Under the General Equivalence Mappings, maternal care due to uterine scar from other previous surgery converts to ICD-9-CM 654.91 (abn pelv org NEC-deliver) and 654.93 (abn pelv org NEC-antepar). 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.