ICD-10-CM 2027 diagnosis code

M34Systemic sclerosis [scleroderma]

Not billable — use a more specific code

M34 is a header code, so it can't be reported by itself. Choose one of the 5 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 M34

M34 is the ICD-10-CM diagnosis code for systemic sclerosis [scleroderma]. It belongs to block M30-M36 (systemic connective tissue 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 5 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: M34.0 (sclerosis), M34.1 (syndrome), M34.2 (chemical), M34.8 (sclerosis) and M34.9 (unspecified).

Don't report M34 together with the conditions in its Excludes1 note: circumscribed scleroderma (L94.0) and neonatal scleroderma (P83.88).

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 M34

Coding notes

Excludes1Not coded here — never report together with this code

circumscribed scleroderma (L94.0)
neonatal scleroderma (P83.88)

Notes that apply from higher levels

Instructions written at a parent level also apply to M34.

Broader instructions also apply from M30-M36 Systemic connective tissue disorders and Chapter 13: Diseases of the musculoskeletal system and connective tissue.

Codes whose notes reference M34

I27.21Code also
K31.84Code first
L93Excludes1

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 M34

Is M34 billable?: No. M34 is a header code. Report one of its more specific subcodes instead.