2026 ICD-10-CM Diagnosis Code O34.211Maternal care for low transverse scar from previous cesarean delivery

ICD-10-CM Codes›O00-O9A›O30-O48›O34

ICD-10-CM O34.211
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O34.211 is a billable ICD-10-CM diagnosis code for maternal care for low transverse scar from previous cesarean delivery. 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). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Previous C-section.

Code Identity

ICD-10-CM Code
O34.211
Billable Status
Yes — Valid for Submission
Code Describes
Maternal care for low transverse scar from previous cesarean delivery
Short Description
Matern care for low transverse scar from prev cesarean del
Parent Code
O34.21
Maternal care for scar from previous cesarean delivery

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 CodeO34.211Maternal care for low transverse scar from previous cesarean delivery

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O34.211.

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).

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.

    • Cesarean delivery, previous, affecting management of pregnancy
      • low transverse scar
    • Delivery(childbirth) (labor)
      • cesarean (for)
        • previous
          • cesarean delivery
            • low transverse scar
    • Delivery(childbirth) (labor)
      • cesarean (for)
        • scar (s)
          • cesarean delivery
            • low transverse
    • Delivery(childbirth) (labor)
      • vaginal, following previous cesarean delivery
        • low transverse scar

Clinical ClassificationClinical

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

CCSR PRG016
Previous C-section
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Prenatal Care

Prenatal care is the health care you get while you are pregnant. It includes your checkups and prenatal testing. Typically, a health care provider specializing in the delivery of babies and the care of pregnant women, such as an obstetrician or a midwife, provides prenatal care.

The full article covers:

  • What is prenatal care?
  • Why do I need prenatal care?
  • How often do I need prenatal visits?
  • What happens during prenatal visits?

Read the full article at MedlinePlus

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

Convert O34.211 to ICD-9-CMHistory

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

ICD-9-CM
654.21 Prev c-delivery-delivrd
Approximate The match is approximate rather than exact.
ICD-9-CM
654.23 Prev c-delivery-antepart
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement O34.211 replaces the following previously assigned code(s):

  • O34.21 - Maternal care for scar from previous cesarean delivery
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About O34.211Overview

Is O34.211 (Maternal care for scar from previous cesarean delivery) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report maternal care for low transverse scar from previous cesarean delivery on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does O34.211 group to?

When maternal care for low transverse scar from previous cesarean delivery 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 O34.211 be reported for?

The Medicare Code Editor checks maternal care for low transverse scar from previous cesarean delivery 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 O34.211?

Under the General Equivalence Mappings, maternal care for low transverse scar from previous cesarean delivery converts to ICD-9-CM 654.21 (prev c-delivery-delivrd) and 654.23 (prev c-delivery-antepart). 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.