ICD-10-CM 2027 diagnosis code

Q36Cleft lip

Not billable — use a more specific code

Q36 is a header code, so it can't be reported by itself. Choose one of the 3 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 Q36

Q36 is the ICD-10-CM diagnosis code for cleft lip. It belongs to block Q35-Q37 (cleft lip and cleft palate) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: Q36.0 (bilateral), Q36.1 (median) and Q36.9 (unilateral).

Don't report Q36 together with the conditions in its Excludes1 note: cleft lip with cleft palate (Q37.-).

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 Q36

Coding notes

IncludesFurther defines the content of the category

cheiloschisis
congenital fissure of lip
harelip
labium leporinum

Excludes1Not coded here — never report together with this code

cleft lip with cleft palate (Q37.-)

Notes that apply from higher levels

Instructions written at a parent level also apply to Q36.

Broader instructions also apply from Q35-Q37 Cleft lip and cleft palate and Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders.

Codes whose notes reference Q36

Q38.0Excludes1

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

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

Common questions about Q36

Is Q36 billable?: No. Q36 is a header code. Report one of its more specific subcodes instead.