ICD-10-CM 2027 diagnosis code

Q73Reduction defects of unspecified limb

Not billable — use a more specific code

Q73 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 Q73

Q73 is the ICD-10-CM diagnosis code for reduction defects of unspecified limb. It belongs to block Q65-Q79 (congenital malformations and deformations of the musculoskeletal system) 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: Q73.0 (limb(s)), Q73.1 (limb(s)) and Q73.8 (limb(s)).

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 Q73

Notes that apply from higher levels

Instructions written at a parent level also apply to Q73.

Broader instructions also apply from Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders.

Codes whose notes reference Q73

M21Excludes1
Q68Excludes1
Q74Excludes1
Z89Excludes1

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 Q73

Is Q73 billable?: No. Q73 is a header code. Report one of its more specific subcodes instead.