What does ICD-10 code P81.0 mean?

ICD-10 code P81.0 is the standardized code used for environmental hyperthermia of newborn in medical records and coding systems.

When is ICD-10 code P81.0 used?

Doctors, hospitals, and insurers may use ICD-10 code P81.0 when recording environmental hyperthermia of newborn in a standardized format.

Does ICD-10 code P81.0 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.

ICD10BillableValid for clinical use

ICD-10 Code P81.0: Environmental hyperthermia of newborn

Name: ICD-10 Code P81.0: Environmental hyperthermia of newborn
Creator: HealthAssure Clinical Team
Published: 2026-05-26T05:25:39.445Z

P81.0 is a billable ICD-10 diagnosis code used to classify Environmental hyperthermia of newborn in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Certain conditions originating in the perinatal period (P00-P96).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. 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 environmental hyperthermia of newborn in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

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.

Code hierarchy

chapter

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

block

P80-P83Conditions involving the integument and temperature regulation of newborn

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

PediatricianNeonatologistPsychiatristClinical Psychologist

Sibling codes

P81.8Other specified disturbances of temperature regulation of newbornbillable P81.9Disturbance of temperature regulation of newborn, unspecifiedbillable

Mapped diagnoses and classifications

SNOMED_CT 30571006high

Neonatal environmental hyperthermia

Source: SNOMED International ICD-10 map

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.

Legacy codes

P81.0

Common synonyms

Environmental hyperthermia of newborn

Frequently asked questions

Code details

CodeP81.0

SystemICD10

Display nameEnvironmental hyperthermia of newborn

ChapterCertain conditions originating in the perinatal period (P00-P96)

BlockConditions involving the integument and temperature regulation of newborn

Flags

BillableYes

Valid clinical useYes

Source

SourceICD-10

Version2026-annual

Releaseannual

Year2026

Index terms

Matched terms

Fever(inanition) (of unknown origin) (persistent) (with chills) (with rigor)Hyperthermia(of unknown origin)Newborn(infant) (liveborn) (singleton)Pyrexia(of unknown origin)

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.