When is ICD-10 code P03.81 used?

Doctors, hospitals, and insurers may use ICD-10 code P03.81 when recording newborn affected by abnormality in fetal (intrauterine) heart rate or rhythm in a standardized format. This entry may also act as a broader category that points toward more specific child codes.

Does ICD-10 code P03.81 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 P03.81: Newborn affected by abnormality in fetal (intrauterine) heart rate or rhythm

Name: ICD-10 Code P03.81: Newborn affected by abnormality in fetal (intrauterine) heart rate or rhythm
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:28:56.049Z

P03.81 is an ICD-10 diagnosis entry used to group records related to Newborn affected by abnormality in fetal (intrauterine) heart rate or rhythm. 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 Certain conditions originating in the perinatal period (P00-P96).

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 Certain conditions originating in the perinatal period (P00-P96).

When is it used?

May be used when a clinician documents newborn affected by abnormality in fetal (intrauterine) heart rate or rhythm 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

16Certain conditions originating in the perinatal period (P00-P96)

block

P00-P04Newborn affected by maternal factors and by complications of pregnancy, labor, and delivery

Official coding notes

Excludes1 (do not code together)

neonatal cardiac dysrhythmia (P29.1-)

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

PediatricianNeonatologistENT SpecialistCardiologist

Sibling codes

P03.82Meconium passage during deliverybillable P03.89Newborn affected by other specified complications of labor and deliverybillable

Coding guidelines

Common synonyms

Newborn affected by abnormality in fetal (intrauterine) heart rate or rhythmNewborn affected by abnormality in fetalNewborn affected by abnormality in fetal intrauterine heart rate or rhythm

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.