2026 ICD-10-CM Diagnosis Code O33.7XX9Maternal care for disproportion due to other fetal deformities, other fetus

ICD-10-CM Codes›O00-O9A›O30-O48›O33

ICD-10-CM O33.7XX9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O33.7XX9 is a billable ICD-10-CM diagnosis code for maternal care for disproportion due to other fetal deformities, other fetus. The 7th character 9 identifies a fetus other than fetus 1 through 5 in a multiple gestation pregnancy. 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). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Malposition, disproportion or other labor complications.

Code Identity

ICD-10-CM Code
O33.7XX9
Billable Status
Yes — Valid for Submission
Code Describes
Maternal care for disproportion due to other fetal deformities, other fetus
Short Description
Maternal care for disproprtn due to other fetal deform, oth
Parent Code
O33.7
Maternal care for disproportion due to other fetal deformities

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 CodeO33.7XX9Maternal care for disproportion due to other fetal deformities, other fetus

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O33.7XX9.

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).

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

Convert O33.7XX9 to ICD-9-CMHistory

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

ICD-9-CM
653.71 Oth abn fet dispro-deliv
Approximate The match is approximate rather than exact.
ICD-9-CM
653.73 Oth abn fet dispro-antep
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement O33.7XX9 replaces the following previously assigned code(s):

  • O33.7 - Maternal care for disproportion due to oth fetal deformities
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About O33.7XX9Overview

Is O33.7XX9 a billable code?

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

What does the 7th character 9 in O33.7XX9 mean?

The final character 9 identifies the fetus in a multiple gestation pregnancy: this code reports maternal care for disproportion due to other fetal deformities for a fetus other than fetus 1 through 5.

What MS-DRG does O33.7XX9 group to?

When maternal care for disproportion due to other fetal deformities, other fetus 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 O33.7XX9 be reported for?

The Medicare Code Editor checks maternal care for disproportion due to other fetal deformities, other fetus 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 O33.7XX9?

Under the General Equivalence Mappings, maternal care for disproportion due to other fetal deformities, other fetus converts to ICD-9-CM 653.71 (oth abn fet dispro-deliv) and 653.73 (oth abn fet dispro-antep). 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.