2026 ICD-10-CM Diagnosis Code O33Maternal care for disproportion

ICD-10-CM Codes›O00-O9A›O30-O48›O33

ICD-10-CM O33
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O33 is a non-billable ICD-10-CM category code for maternal care for disproportion, so it cannot be submitted on claims. Use a more specific code from this category instead, such as O33.0, O33.1, O33.2, and O33.3XX0.

Code Identity

ICD-10-CM Code
O33
Billable Status
No — Non-Billable Category
Code Describes
Maternal care for disproportion
Chapter
O30-O48
Maternal care related to the fetus and amniotic cavity and possible delivery problems

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO30-O48Maternal care related to the fetus and amniotic cavity and possible delivery problems
CategoryO33Maternal care for disproportion
This CodeO33Maternal care for disproportion

Specific Coding for Maternal care for disproportionOverview

Non-specific codes like O33 require more characters. Use one of these billable codes instead:

  • Use O33.0 for Maternal care for disproportion due to deformity of maternal pelvic bones

  • Use O33.1 for Maternal care for disproportion due to generally contracted pelvis

  • Use O33.2 for Maternal care for disproportion due to inlet contraction of pelvis

  • O33.3 for Maternal care for disproportion due to outlet contraction of pelvis

  • O33.4 for Maternal care for disproportion of mixed maternal and fetal origin

  • O33.5 for Maternal care for disproportion due to unusually large fetus

  • O33.6 for Maternal care for disproportion due to hydrocephalic fetus

  • O33.7 for Maternal care for disproportion due to other fetal deformities

  • Use O33.8 for Maternal care for disproportion of other origin

  • Use O33.9 for Maternal care for disproportion, unspecified

Tabular List NotesGuidance

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

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

Type 1 Excludes

  • disproportion with obstructed labor O65 O66

Patient EducationClinical

Childbirth Problems

Childbirth is the process of giving birth to a baby. It includes labor and delivery. Usually everything goes well, but problems can happen. They may cause a risk to the mother, baby, or both. Some of the more common childbirth problems include:

Read the full article at MedlinePlus

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

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 O33Overview

Is O33 (Maternal care for disproportion) a billable code?

No. This is a category header that groups the codes for maternal care for disproportion, and headers cannot be submitted on claims. Claims for maternal care for disproportion need a more specific code from this category, such as O33.0, O33.1, and O33.2.