2026 ICD-10-CM Diagnosis Code O33.8Maternal care for disproportion of other origin

ICD-10-CM Codes›O00-O9A›O30-O48›O33

ICD-10-CM O33.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O33.8 is a billable ICD-10-CM diagnosis code for maternal care for disproportion of other origin. 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). Coders also document this condition as disproportion between fetus and pelvis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Malposition, disproportion or other labor complications.

Code Identity

ICD-10-CM Code
O33.8
Billable Status
Yes — Valid for Submission
Code Describes
Maternal care for disproportion of other origin
Short Description
Maternal care for disproportion of other origin
Same as the full description in the CMS dataset.
Parent Code
O33
Maternal care for disproportion

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 CodeO33.8Maternal care for disproportion of other origin

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O33.8.

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).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disproportion between fetus and pelvis
  • Disproportion between fetus and pelvis due to conjoined twins

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.

    • Distortion(s) (congenital)
      • lumbar spine
        • with disproportion
    • Pregnancy(single) (uterine)
      • complicated by (care of) (management affected by)
        • disproportion (due to)
          • specified NEC

Clinical ClassificationClinical

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

CCSR PRG024
Malposition, disproportion or other labor complications
Default principal diagnosis: inpatient Yes · outpatient Yes

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.

Convert O33.8 to ICD-9-CMHistory

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

ICD-9-CM
653.81 Disproportion NEC-deliv
Approximate The match is approximate rather than exact.
ICD-9-CM
653.83 Dispropor NEC-antepartum
Approximate The match is approximate rather than exact.

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 O33.8Overview

Is O33.8 (Maternal care for disproportion) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report maternal care for disproportion of other origin on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does O33.8 group to?

When maternal care for disproportion of other origin 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 O33.8 be reported for?

The Medicare Code Editor checks maternal care for disproportion of other origin 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 O33.8?

Under the General Equivalence Mappings, maternal care for disproportion of other origin converts to ICD-9-CM 653.81 (disproportion NEC-deliv) and 653.83 (dispropor NEC-antepartum). 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.