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

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

Coding at a Glance

Tabular directives
1 inclusion term · 1 Excludes1

Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

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

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for O33.8 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Notes without a marker are published on O33.8 itself; “inherited from” names the category or block whose note applies here.

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

Source: inherited from O33

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Source: inherited from O33

Coder workflow for O33.8

MedCoder structured workflow — derived from this code’s own official record

Before you code O33.8

  1. Confirm the condition is documented as complicating the pregnancy, childbirth, or the puerperium, and check the trimester where the code carries one and the fetus character where the category requires it. Chapter 15 codes belong on the maternal record only and take sequencing priority over codes from other chapters. It is the provider’s responsibility to state that a condition is not affecting the pregnancy; the trimester is assigned from the documentation (Guidelines I.C.15.a, I.C.15.a.1, I.C.15.a.3).

    Guide: How to choose an ICD-10-CM code →

  2. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with O33.8. Excludes1 conditions are not reported together with this code unless the record shows they are unrelated (Guidelines I.A.12.a).

    See the official tabular notes

Choose the right path

  1. Does the documentation support a condition named in O33.8’s Excludes1 note?
    Yes → Do not simply proceed: review the excluded code. Both are reported only when the record shows the two conditions are unrelated.
    No → Continue.

Consider O33.8. Then confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
Trimester
Assigned from the documented trimester at the encounter, or the trimester in which the condition developed for inpatient stays (Guidelines I.C.15.a.3).
Fetus affected
For multiple gestations, the fetus the condition affects, as documented.

Official instructions as workflow

  • Excludes1 — check before selecting O33.8(1 note)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with O33.8: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    See the official tabular notes · Guidelines I.A.12.a

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: Both the condition O33.8 describes and a condition named in its Excludes1 note are documented for the same encounter.

Coding question: Can both codes be reported?

Path: Review the Excludes1 note and the excluded code, and look for a provider statement on whether the two conditions are related.

Reason: Excludes1 means the two are not coded together; the exception is when the record shows the conditions are unrelated to each other (Guidelines I.A.12.a).

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Code Overview

Maternal care for disproportion of other origin is a billable ICD-10-CM diagnosis code (O33.8).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Indexed Clinical Terms (2)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

Verify Before Coding

  • Age-restricted: the Medicare Code Editor lists this as a maternity (age 9-64) diagnosis; other ages are presumed incorrect.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

Other codes that name O33.8 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 1 Excludes1 note: M95.5 — Acquired deformity of pelvis (via O33.-).

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 10 Excludes2 notes: O20 — Hemorrhage in early pregnancy (via O33.-), O20-O29 — Other maternal disorders predominantly related to pregnancy (O20-O29) (via O33.-), O21 — Excessive vomiting in pregnancy (via O33.-), O22 — Venous complications and hemorrhoids in pregnancy (via O33.-), O23 — Infections of genitourinary tract in pregnancy (via O33.-), O24 — Diabetes mellitus in pregnancy, childbirth, and the puerperium (via O33.-), O25 — Malnutrition in pregnancy, childbirth and the puerperium (via O33.-), O26 — Maternal care for other conditions predominantly related to pregnancy (via O33.-), O28 — Abnormal findings on antenatal screening of mother (via O33.-), O29 — Complications of anesthesia during pregnancy (via O33.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 MS-DRG: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 6 MS-DRGs: DRG 817 (MDC 14), DRG 818 (MDC 14), DRG 819 (MDC 14), DRG 831 (MDC 14), DRG 832 (MDC 14), DRG 833 (MDC 14).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):PRG024 — Malposition, disproportion or other labor complications (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Malposition, disproportion or other labor complications).

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, O33.7XX9 — Maternal care for disproportion due to other fetal deformities, other fetus, O33.9 — Maternal care for disproportion, unspecified, O61.0 — Failed medical induction of labor, O61.1 — Failed instrumental induction of labor, O61.8 — Other failed induction of labor, O61.9 — Failed induction of labor, unspecified, O62.0 — Primary inadequate contractions, O62.1 — Secondary uterine inertia, O62.2 — Other uterine inertia, O62.3 — Precipitate labor, O62.4 — Hypertonic, incoordinate, and prolonged uterine contractions, +239 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main term “Distortion”; these codes share that main term but sit in a different category of the Tabular List.

H53.15 — Visual distortions of shape and size (visual, shape and size), M26.89 — Other dentofacial anomalies (jaw NEC), O65.0 — Obstructed labor due to deformed pelvis (lumbar spine, with disproportion, causing obstructed labor), Q00.0 — Anencephaly (skull bone NEC, with, anencephalus), Q02 — Microcephaly (skull bone NEC, with, microcephaly), Q03.9 — Congenital hydrocephalus, unspecified (skull bone NEC, with, hydrocephalus), Q04.8 — Other specified congenital malformations of brain (gyri), Q04.9 — Congenital malformation of brain, unspecified (brain), Q06.8 — Other specified congenital malformations of spinal cord (spinal cord), Q07.8 — Other specified congenital malformations of nervous system (nerve), Q12.8 — Other congenital lens malformations (lens), Q15.8 — Other specified congenital malformations of eye (eye), Q16.3 — Congenital malformation of ear ossicles (ossicles, ear), Q16.4 — Other congenital malformations of middle ear (ear, middle), Q16.5 — Congenital malformation of inner ear (ear, inner), Q17.3 — Other misshapen ear (ear), Q17.8 — Other specified congenital malformations of ear (eustachian tube), Q24.5 — Malformation of coronary vessels (coronary), Q24.8 — Other specified congenital malformations of heart (heart), Q30.8 — Other congenital malformations of nose (nose), +28 more

Contextual Map

Every relationship of O33.8 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run O33.8 with these 9 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes

Referenced by Excludes2 notes (10)

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

  • MDC 14 — Pregnancy, Childbirth and the Puerperium[MDC crossing]: “Pregnancy, Childbirth and the Puerperium — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 94 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Index entries

  • Distortion (s) (congenital), lumbar spine, with disproportion[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Pregnancy (single) (uterine), complicated by (care of) (management affected by), disproportion (due to), specified NEC[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026

Nearest codes (40)

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v43.1 (April 2026) Release, file and checksum · Publisher’s page
Inpatient payment groups Official source data
CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v43 Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder structured relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "O33.8 — Maternal care for disproportion of other origin." ICD-10-CM FY2026. https://medcoder.ai/icd10/code/o33.8-maternal-care-for-disproportion-of-other-origin

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Maternal care for disproportion of other origin

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027 (effective October 1, 2026), and none are recorded for this code. Note changes are tracked from FY2027 only.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to O33.8 in its code family, with their registry titles.

View all codes in the O33 family