O63Header code — not billable

Long labor

Chapter
15. Pregnancy, childbirth and the puerperium
Category
O63
Effective date
October 1, 2026

Related codes in category O63

O63.0Prolonged first stage (of labor)YesO63.1Prolonged second stage (of labor)YesO63.2Delayed delivery of second twin, triplet, etc.YesO63.9Long labor, unspecifiedYes

Frequently asked questions

What is ICD-10 code O63?

O63 is an ICD-10-CM diagnosis code for Long labor.

Is O63 a billable code?

No. O63 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is O63 in?

O63 falls under Chapter 15: Pregnancy, childbirth and the puerperium.

When did O63 become effective?

O63 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to O63?

O63 belongs to category O63, which includes 4 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.