M34.9 — Systemic sclerosis, unspecified
M34.9

What this code means
Systemic sclerosis (scleroderma) is an autoimmune condition causing thickening of skin and scarring of internal organs.
Also called: systemic sclerosis, scleroderma.
When this code is used
Used for systemic sclerosis, unspecified.
Where it sits in ICD-10-CM
Code M34.9 belongs to Chapter 13: Diseases of the musculoskeletal system and connective tissue, which covers codes M00–M99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.
Related symptoms
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Frequently asked questions
What is ICD-10-CM code M34.9?
M34.9 is the ICD-10-CM diagnosis code for “Systemic sclerosis, unspecified”. Systemic sclerosis (scleroderma) is an autoimmune condition causing thickening of skin and scarring of internal organs.
When is code M34.9 used?
Used for systemic sclerosis, unspecified. It belongs to Chapter 13 of ICD-10-CM (Diseases of the musculoskeletal system and connective tissue).
This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.