What does ICD-10 code O00 mean?

ICD-10 code O00 is the standardized code used for ectopic pregnancy in medical records and coding systems.

When is ICD-10 code O00 used?

Doctors, hospitals, and insurers may use ICD-10 code O00 when recording ectopic pregnancy in a standardized format. This entry may also act as a broader category that points toward more specific child codes.

Does ICD-10 code O00 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10

ICD-10 Code O00: Ectopic pregnancy

Name: ICD-10 Code O00: Ectopic pregnancy
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:27:13.082Z

O00 is an ICD-10 diagnosis entry used to group records related to Ectopic pregnancy. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Pregnancy, childbirth and the puerperium (O00-O9A).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Pregnancy, childbirth and the puerperium (O00-O9A).

When is it used?

May be used when a clinician documents ectopic pregnancy in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

What it does not mean

A code alone does not explain severity, treatment plan, or outcome.
A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter

15Pregnancy, childbirth and the puerperium (O00-O9A)

block

O00-O08Pregnancy with abortive outcome

currentO00-O08

Official coding notes

Includes

ruptured ectopic pregnancy

Applicable to

code from category O08 to identify any associated complication

Use additional code

code from category O08 to identify any associated complication

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

ObstetricianGynecologist

Sibling codes

O01Hydatidiform mole O02Other abnormal products of conception O03Spontaneous abortion O04Complications following (induced) termination of pregnancy O07Failed attempted termination of pregnancy O08Complications following ectopic and molar pregnancy

Coding guidelines

Compatibility

Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.

Legacy codes

O00

Common synonyms

Ectopic pregnancy

Frequently asked questions

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.