P91.61 – Mild hypoxic ischemic encephalopathy [HIE]

ICD-10-CM 2027 diagnosis code · Other disorders originating in the perinatal period

Billable code

ICD-10-CM code P91.61

Code: P91.61 (claims format: P9161)
Description: Mild hypoxic ischemic encephalopathy [HIE]
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 16. Certain conditions originating in the perinatal period (P00-P96)
Block: P90-P96 Other disorders originating in the perinatal period
Parent codes: P91 › P91.6

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

P91.6 – Hypoxic ischemic encephalopathy [HIE]

Excludes1 (not coded here):

Neonatal cerebral depression (P91.4)
Neonatal cerebral irritability (P91.3)
Neonatal coma (P91.5)

Index terms for P91.61

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in P91.6

Frequently asked questions

What is ICD-10 code P91.61?

P91.61 is the ICD-10-CM code for mild hypoxic ischemic encephalopathy [HIE], in the block P90-P96 (Other disorders originating in the perinatal period).

Is P91.61 a billable code?

Yes. P91.61 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does P91.61 belong to?

It belongs to category P91 – Other disturbances of cerebral status of newborn.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.