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ICD-10/O34.00

O34.00 ICD-10-CM Code: Maternal care for unspecified congenital malformation of uterus, unspecified trimester

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0 (FY2026), Appendix B.

  • MS-DRG 817 — OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITH MCC (MDC 14)
  • MS-DRG 818 — OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITH CC (MDC 14)
  • MS-DRG 819 — OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITHOUT CC/MCC (MDC 14)
  • MS-DRG 831 — OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITH MCC (MDC 14)
  • MS-DRG 832 — OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITH CC (MDC 14)
  • MS-DRG 833 — OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITHOUT CC/MCC (MDC 14)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.

Official Registry Overview & Definition

Maternal care for unspecified congenital malformation of uterus, unspecified trimester is a billable ICD-10-CM diagnosis code (O34.00).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for O34.00 in the official ICD-10-CM tabular list.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • 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

Underlying conditions that must be sequenced before this code.

  • any associated obstructed labor (O65.5)

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code for specific condition

Nearest Codes in This Family

Official ICD-10-CM classifications closest to O34.00 in its code family, with their registry titles.

  • O34 — Maternal care for abnormality of pelvic organs
  • O34.0 — Maternal care for congenital malformation of uterus
  • O34.01 — Maternal care for unspecified congenital malformation of uterus, first trimester
  • O34.02 — Maternal care for unspecified congenital malformation of uterus, second trimester
  • O34.03 — Maternal care for unspecified congenital malformation of uterus, third trimester
  • O34.1 — Maternal care for benign tumor of corpus uteri
  • O34.10 — Maternal care for benign tumor of corpus uteri, unspecified trimester
  • O34.11 — Maternal care for benign tumor of corpus uteri, first trimester
  • O34.12 — Maternal care for benign tumor of corpus uteri, second trimester
  • O34.13 — Maternal care for benign tumor of corpus uteri, third trimester

View all codes in the O34 family

Indexed Clinical Terms (2)

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.

  • Bicornate or bicornis uterus, in pregnancy or childbirth
  • Unicornate uterus, in pregnancy or childbirth