ICD-10-CM 2027 diagnosis code

M20.5XOther deformities of toe(s) (acquired)

Not billable — use a more specific code

M20.5X 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 M20.5X

M20.5X is the ICD-10-CM diagnosis code for other deformities of toe(s) (acquired). It belongs to category M20 (acquired deformities of fingers and toes), block M20-M25 (other joint disorders) and chapter 13 (diseases of the musculoskeletal system and connective tissue). 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: M20.5X1 (right foot), M20.5X2 (left foot) and M20.5X9 (unspecified foot).

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 M20.5X

Notes that apply from higher levels

Instructions written at a parent level also apply to M20.5X.

› From M20 Acquired deformities of fingers and toes

Excludes1

acquired absence of fingers and toes (Z89.-)
congenital absence of fingers and toes (Q71.3-, Q72.3-)
congenital deformities and malformations of fingers and toes (Q66.-, Q68-Q70, Q74.-)

Broader instructions also apply from M20-M25 Other joint disorders and Chapter 13: Diseases of the musculoskeletal system and connective tissue.

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to M20.5X.

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 M20.5X

Is M20.5X billable?: No. M20.5X is a header code. Report one of its more specific subcodes instead.