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ICD-10-CM 2027 diagnosis code

O34.211Maternal care for low transverse scar from previous cesarean delivery

✓ Billable / specificMaternity · age 9–64Female only

O34.211 is a valid, billable ICD-10-CM code for maternal care for low transverse scar from previous cesarean delivery. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Matern care for low transverse scar from prev cesarean del

Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About O34.211

O34.211 is the ICD-10-CM diagnosis code for maternal care for low transverse scar from previous cesarean delivery. It belongs to category O34 (maternal care for abnormality of pelvic organs), block O30-O48 (maternal care related to the fetus and amniotic cavity and possible delivery problems) and chapter 15 (pregnancy, childbirth and the puerperium). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within O34.21 (maternal care for scar from previous cesarean delivery), O34.211 is specifically for maternal care for low transverse scar from previous cesarean delivery. Related codes cover vertical scar from previous cesarean delivery (O34.212), other type scar from previous cesarean delivery (O34.218) and unspecified type scar from previous cesarean delivery (O34.219).

Code first: any associated obstructed labor (O65.5).

Use an additional code for specific condition.

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 817 (Other Antepartum Diagnoses with O.R. Procedures with MCC, relative weight 2.0534), DRG 818 (Other Antepartum Diagnoses with O.R. Procedures with CC, relative weight 1.2942), DRG 819 (Other Antepartum Diagnoses with O.R. Procedures without CC/MCC, relative weight 0.7739), DRG 831 (Other Antepartum Diagnoses without O.R. Procedures with MCC, relative weight 1.1558), DRG 832 (Other Antepartum Diagnoses without O.R. Procedures with CC, relative weight 0.7585) and DRG 833 (Other Antepartum Diagnoses without O.R. Procedures without CC/MCC, relative weight 0.5002), in MDC 14 (Pregnancy, Childbirth and the Puerperium), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

The Medicare Code Editor treats this as a maternity diagnosis, expected only for patients age 9 through 64.

It is on the CMS list of diagnoses consistent only with female patients (the sex-conflict edit itself was retired in FY2025).

It was added in FY2017, effective October 1, 2016.

Before ICD-10, this condition was coded in ICD-9-CM as 654.21 (previous cesarean delivery, delivered, with or without mention of antepartum condition) and 654.23 (previous cesarean delivery, antepartum condition or complication).

Notes that apply from higher levels

Instructions written at a parent level also apply to O34.211.

› From O34 Maternal care for abnormality of pelvic organs
Includes
  • the listed conditions as a reason for hospitalization or other obstetric care of the mother, or for cesarean delivery before onset of labor
Code first
  • any associated obstructed labor (O65.5)
Use additional code
  • code for specific condition

Broader instructions also apply from Chapter 15: Pregnancy, childbirth and the puerperium.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to O34.211.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 654.21Previous cesarean delivery, delivered, with or without mention of antepartum conditionapproximate
  • 654.23Previous cesarean delivery, antepartum condition or complicationapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2017 (effective 10/1/2016): Added
  • No changes since FY2017.

Common questions about O34.211

Is O34.211 billable?

Yes. O34.211 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can O34.211 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict O34.211 as a principal diagnosis.

Is O34.211 a CC or MCC?

No. O34.211 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does O34.211 group to?

O34.211 is used in the MS-DRG v44.0 logic for MS-DRG 817 (Other Antepartum Diagnoses with O.R. Procedures with MCC), MS-DRG 818 (Other Antepartum Diagnoses with O.R. Procedures with CC), MS-DRG 819 (Other Antepartum Diagnoses with O.R. Procedures without CC/MCC), MS-DRG 831 (Other Antepartum Diagnoses without O.R. Procedures with MCC), MS-DRG 832 (Other Antepartum Diagnoses without O.R. Procedures with CC) and MS-DRG 833 (Other Antepartum Diagnoses without O.R. Procedures without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for O34.211?

The CMS General Equivalence Mappings map O34.211 to ICD-9-CM 654.21 and 654.23.