P81.0 Environmental hyperthermia of newborn

Billable ICD-10-CM code, FY2026.

MS-DRG index

Defines the logic of DRG(s) 794 in MDC 15.

Approximate ICD-9-CM (GEMs)

• 778.4 Other disturbances of temperature regulation of newborn (approximate)

Diagnosis Index entries for P81.0

• Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › newborn › environmental
• Hyperthermia (of unknown origin) › newborn › environmental
• Newborn (infant) (liveborn) (singleton) › fever › environmentally-induced
• Pyrexia (of unknown origin) › newborn › environmentally-induced

Nearby codes

• P81 Other disturbances of temperature regulation of newborn
• P81.0 Environmental hyperthermia of newborn (this code)
• P81.8 Other specified disturbances of temperature regulation of newborn
• P81.9 Disturbance of temperature regulation of newborn, unspecified