ICD-10-CM 2027
ICD-10 code for neonatal hypothermia
From the official ICD-10-CM alphabetic index entry “Hypothermia (accidental) › neonatal”. Page updated September 29, 2026.
About coding neonatal hypothermia
The ICD-10-CM code for neonatal hypothermia is P80.9 (Hypothermia of newborn, unspecified). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on P80.9.
Within P80, choose P80.9 (unspecified) only when documentation doesn't support a more specific option: cold injury syndrome (P80.0) and other hypothermia of newborn (P80.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 794 (Neonate with Other Significant Problems, relative weight 1.4935), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific neonatal hypothermia codes (official index)
Common questions about neonatal hypothermia ICD-10 codes
What is the ICD-10 code for neonatal hypothermia?
- P80.9 — Hypothermia of newborn, unspecified. More specific codes apply when the documentation supports them: P80.8, P80.8, P80.0, P80.8.
What is the ICD-10 code for environmental nec neonatal hypothermia?
- P80.8 — Other hypothermia of newborn.
What is the ICD-10 code for mild neonatal hypothermia?
- P80.8 — Other hypothermia of newborn.
What is the ICD-10 code for severe neonatal hypothermia?
- P80.0 — Cold injury syndrome.
Is P80.9 billable?
- Yes. P80.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can P80.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict P80.9 as a principal diagnosis.
Is P80.9 a CC or MCC?
- No. P80.9 is neither a CC nor an MCC under MS-DRG v44.0.