P08.21Billable

Post-term newborn

Chapter
16. Certain conditions originating in the perinatal period
Category
P08
Effective date
October 1, 2026

Related codes in category P08

P08Disord of newborn related to long gest and high birth weightP08.0Exceptionally large newborn babyYesP08.1Other heavy for gestational age newbornYesP08.2Late newborn, not heavy for gestational ageP08.22Prolonged gestation of newbornYes

Frequently asked questions

What is ICD-10 code P08.21?

P08.21 is an ICD-10-CM diagnosis code for Post-term newborn.

Is P08.21 a billable code?

Yes. P08.21 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is P08.21 in?

P08.21 falls under Chapter 16: Certain conditions originating in the perinatal period.

When did P08.21 become effective?

P08.21 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to P08.21?

P08.21 belongs to category P08, which includes 5 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.