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ICD-10/O33.7XX9

O33.7XX9 ICD-10-CM Code: Maternal care for disproportion due to other fetal deformities, other fetus

O33.7XX9 is the authoritative medical code for Maternal care for disproportion due to other fetal deformities, other fetus. This classification is used in medical billing and clinical recording to specify the clinical criteria for maternal care for disproportion due to other fetal deformities, other fetus (ICD-10-CM O33.7XX9), ensuring healthcare documentation aligns with current federal coding standards.

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 disproportion due to other fetal deformities, other fetus is a billable ICD-10-CM diagnosis code (O33.79). Includes: the listed conditions as a reason for observation, hospitalization or other obstetric care of the mother, or for cesarean delivery before onset of labor. Inclusion terms: Maternal care for disproportion due to fetal ascites; Maternal care for disproportion due to fetal hydrops; Maternal care for disproportion due to fetal meningomyelocele; Maternal care for disproportion due to fetal sacral teratoma; Maternal care for disproportion due to fetal tumor. Excludes1 (not coded here): obstructed labor due to other fetal deformities (O66.3); disproportion with obstructed labor (O65-O66). 7th character: One of the following 7th characters is to be assigned to code O33.7. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning code O33.7 with a 7th character of 1 through 9..

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for O33.7XX9 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 observation, hospitalization or other obstetric care of the mother, or for cesarean delivery before onset of labor

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Maternal care for disproportion due to fetal ascites
  • Maternal care for disproportion due to fetal hydrops
  • Maternal care for disproportion due to fetal meningomyelocele
  • Maternal care for disproportion due to fetal sacral teratoma
  • Maternal care for disproportion due to fetal tumor

Excludes1 — Not Coded Here

Conditions that can never be reported with this code; the two are mutually exclusive.

  • obstructed labor due to other fetal deformities (O66.3)
  • disproportion with obstructed labor (O65-O66)

Frequently Asked Questions (FAQ) & Clinical Guidance

Does O33.7XX9 require a 7th character?

Yes. One of the following 7th characters is to be assigned to code O33.7. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning code O33.7 with a 7th character of 1 through 9..

What can't be coded together with O33.7XX9?

Per official ICD-10-CM Excludes1 instructions, O33.7XX9 must not be reported together with: obstructed labor due to other fetal deformities (O66.3); disproportion with obstructed labor (O65-O66).

What conditions are included under O33.7XX9?

Maternal care for disproportion due to other fetal deformities, other fetus includes: Maternal care for disproportion due to fetal ascites; Maternal care for disproportion due to fetal hydrops; Maternal care for disproportion due to fetal meningomyelocele; Maternal care for disproportion due to fetal sacral teratoma; Maternal care for disproportion due to fetal tumor.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to O33.7XX9 in its code family, with their registry titles.

  • O33.6XX5 — Maternal care for disproportion due to hydrocephalic fetus, fetus 5
  • O33.6XX9 — Maternal care for disproportion due to hydrocephalic fetus, other fetus
  • O33.7 — Maternal care for disproportion due to other fetal deformities
  • O33.7XX0 — Maternal care for disproportion due to other fetal deformities, not applicable or unspecified
  • O33.7XX1 — Maternal care for disproportion due to other fetal deformities, fetus 1
  • O33.7XX2 — Maternal care for disproportion due to other fetal deformities, fetus 2
  • O33.7XX3 — Maternal care for disproportion due to other fetal deformities, fetus 3
  • O33.7XX4 — Maternal care for disproportion due to other fetal deformities, fetus 4
  • O33.7XX5 — Maternal care for disproportion due to other fetal deformities, fetus 5
  • O33.8 — Maternal care for disproportion of other origin

View all codes in the O33 family