I.C.16

Chapter 16: Certain Conditions Originating in the Perinatal Period

(P00-P96) For coding and reporting purposes the perinatal period is defined as before birth through the 28th day following birth. The following guidelines are provided for reporting purposes.

In this section

I.C.16.aGeneral Perinatal Rules
I.C.16.bObservation and Evaluation of Newborns for Suspected
I.C.16.cCoding Additional Perinatal Diagnoses
I.C.16.dPrematurity and Fetal Growth Retardation
I.C.16.eLow birth weight and immaturity status
I.C.16.fBacterial Sepsis of Newborn
I.C.16.gStillbirth
I.C.16.hCOVID-19 Infection in Newborn

ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026 (effective October 1, 2025). Published by CMS and NCHS. Reproduced for reference — always verify against the official CMS release.