What does ICD-10 code O99.01 mean?

ICD-10 code O99.01 is the standardized code used for anemia complicating pregnancy in medical records and coding systems.

When is ICD-10 code O99.01 used?

Doctors, hospitals, and insurers may use ICD-10 code O99.01 when recording anemia complicating 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 O99.01 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 O99.01: Anemia complicating pregnancy

Name: ICD-10 Code O99.01: Anemia complicating pregnancy
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:28:46.742Z

O99.01 is an ICD-10 diagnosis entry used to group records related to Anemia complicating 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 anemia complicating 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

O94-O9AOther obstetric conditions, not elsewhere classified

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

ObstetricianGynecologistHematologist

Related tests

Complete blood count

Commonly reviewed when assessing anemia complicating pregnancy.

Ferritin

May help evaluate iron deficiency in pregnancy-related anemia workup.

Iron studies

May be reviewed when anemia in pregnancy raises concern for iron deficiency.

Related procedures

Obstetric ultrasound

May appear in pregnancy follow-up pathways when maternal diseases complicate pregnancy and fetal well-being is monitored.

Fetal nonstress testing

May be used in selected higher-risk pregnancy monitoring pathways.

Sibling codes

O99.02Anemia complicating childbirthbillable O99.03Anemia complicating the puerperiumbillable

Coding guidelines

Common synonyms

Anemia complicating 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.