ICD-10-CM 2027 diagnosis code

O63Long labor

Not billable — use a more specific code

O63 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About O63

O63 is the ICD-10-CM diagnosis code for long labor. It belongs to block O60-O77 (complications of labor and delivery) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: O63.0 (labor)), O63.1 (labor)), O63.2 (etc.) and O63.9 (unspecified).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under O63

Notes that apply from higher levels

Instructions written at a parent level also apply to O63.

Broader instructions also apply from Chapter 15: Pregnancy, childbirth and the puerperium.

Code history

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2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about O63

Is O63 billable?: No. O63 is a header code. Report one of its more specific subcodes instead.