U.S. ICD-10-CM · FY 2027

O33 ICD-10-CM Code: Maternal care for disproportion

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

O33

Maternal care for disproportion

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where O33 sits

  1. 1

    Chapter 15

    Pregnancy, childbirth and the puerperium (O00-O9A)

  2. 2

    Section

    Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)

  3. 3

    Category O33

    Maternal care for disproportion

  4. 4

    Code O33

    Maternal care for disproportion

More specific choices

Codes under O33

O33 is a non-billable category. Choose the child code that best matches the documented diagnosis.

O33.0

Maternal care for disproportion due to deformity of maternal pelvic bones

O33.1

Maternal care for disproportion due to generally contracted pelvis

O33.2

Maternal care for disproportion due to inlet contraction of pelvis

O33.3

Maternal care for disproportion due to outlet contraction of pelvis

O33.4

Maternal care for disproportion of mixed maternal and fetal origin

O33.5

Maternal care for disproportion due to unusually large fetus

O33.6

Maternal care for disproportion due to hydrocephalic fetus

O33.7

Maternal care for disproportion due to other fetal deformities

O33.8

Maternal care for disproportion of other origin

O33.9

Maternal care for disproportion, unspecified

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for O33.

Code first

No “code first” instruction is listed for O33.

Use additional code

No “use additional code” instruction is listed for O33.

Excludes1

Conditions that should not be reported together with this code.

  • disproportion with obstructed labor (O65-O66)

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for O33.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code O33 mean?

O33 is the FY 2027 U.S. ICD-10-CM code for “Maternal care for disproportion.”

Is O33 a billable or specific ICD-10-CM code?

No. O33 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is O33 located in ICD-10-CM?

O33 is listed in Chapter 15, Pregnancy, childbirth and the puerperium (O00-O9A), within Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48) (O30–O48), under category O33, Maternal care for disproportion.

What coding notes are listed for O33?

No inclusion terms are listed for O33 in this reference record. No code-first instruction is listed. Excludes1 notes: disproportion with obstructed labor (O65-O66). No Excludes2 note is listed.

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