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U.S. ICD-10-CM · FY 2027

O9A.1 ICD-10-CM Code: Malignant neoplasm complicating pregnancy, childbirth and the puerperium

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

Code definition

Official description

O9A.1

Malignant neoplasm complicating pregnancy, childbirth and the puerperium

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

Classification

Where O9A.1 sits

  1. 1

    Chapter 15

    Pregnancy, childbirth and the puerperium (O00-O9A)

  2. 2

    Section

    Other obstetric conditions, not elsewhere classified (O94-O9A)

  3. 3

    Category O9A

    Maternal malignant neoplasms, traumatic injuries and abuse classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

  4. 4

    Code O9A.1

    Malignant neoplasm complicating pregnancy, childbirth and the puerperium

More specific choices

Codes under O9A.1

O9A.1 is a non-billable category. Choose the child code that best matches the documented diagnosis.

O9A.11

Malignant neoplasm complicating pregnancy

O9A.12

Malignant neoplasm complicating childbirth

O9A.13

Malignant neoplasm complicating the puerperium

Documentation details

Notes for this code

Inclusion terms

  • Conditions in C00-C96

Code first

No “code first” instruction is listed for O9A.1.

Use additional code

  • code to identify neoplasm

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for O9A.1.

Excludes2

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

  • maternal care for benign tumor of corpus uteri (O34.1-)
  • maternal care for benign tumor of cervix (O34.4-)

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 O9A.1 mean?

O9A.1 is the FY 2027 U.S. ICD-10-CM code for “Malignant neoplasm complicating pregnancy, childbirth and the puerperium.”

Is O9A.1 a billable or specific ICD-10-CM code?

No. O9A.1 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 O9A.1 located in ICD-10-CM?

O9A.1 is listed in Chapter 15, Pregnancy, childbirth and the puerperium (O00-O9A), within Other obstetric conditions, not elsewhere classified (O94-O9A) (O94–O9A), under category O9A, Maternal malignant neoplasms, traumatic injuries and abuse classifiable elsewhere but complicating pregnancy, childbirth and the puerperium.

What coding notes are listed for O9A.1?

Its listed inclusion terms are Conditions in C00-C96. No code-first instruction is listed. Additional-code instructions: code to identify neoplasm. No Excludes1 note is listed. Excludes2 notes: maternal care for benign tumor of corpus uteri (O34.1-); maternal care for benign tumor of cervix (O34.4-).

Keep exploring

Related O9A codes

O9A.2

Injury, poisoning and certain other consequences of external causes complicating pregnancy, childbirth and the puerperium

O9A.3

Physical abuse complicating pregnancy, childbirth and the puerperium

O9A.4

Sexual abuse complicating pregnancy, childbirth and the puerperium

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