2027 ICD-10-CM Diagnosis Code M34Systemic sclerosis [scleroderma]

ICD-10-CM Codes›M00–M99›M30-M36›M34

ICD-10-CM M34
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M34 is a non-billable ICD-10-CM category code for systemic sclerosis [scleroderma], so it cannot be submitted on claims. Use a more specific code from this category instead, such as M34.0, M34.1, M34.2, and M34.81.

Code Identity

ICD-10-CM Code
M34
Billable Status
No — Non-Billable Category
Code Describes
Systemic sclerosis [scleroderma]
Short Description
Systemic sclerosis [scleroderma]
Same as the full description in the CMS dataset.
Chapter
M30-M36
Systemic connective tissue disorders

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM30-M36Systemic connective tissue disorders
CategoryM34Systemic sclerosis [scleroderma]
This CodeM34Systemic sclerosis [scleroderma]

Specific Coding for Systemic sclerosis [scleroderma]Overview

Non-specific codes like M34 require more characters. Use one of these billable codes instead:

  • Use M34.0 for Progressive systemic sclerosis

  • Use M34.1 for CR(E)ST syndrome

  • Use M34.2 for Systemic sclerosis induced by drug and chemical

  • M34.8 for Other forms of systemic sclerosis

  • Use M34.81 for Systemic sclerosis with lung involvement

  • Use M34.82 for Systemic sclerosis with myopathy

  • Use M34.83 for Systemic sclerosis with polyneuropathy

  • Use M34.89 for Other systemic sclerosis

  • Use M34.9 for Systemic sclerosis, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M34: its own notes plus those printed at block M30-M36 and Chapter 13. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Block M30-M36 Systemic connective tissue disorders applies to 84 codes
  • autoimmune disease NOS
  • collagen (vascular) disease NOS
  • systemic autoimmune disease
  • systemic collagen (vascular) disease

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

On M34 itself
  • circumscribed scleroderma (L94.0)
  • neonatal scleroderma (P83.88)
From Block M30-M36 Systemic connective tissue disorders applies to 84 codes
  • autoimmune disease, single organ or single cell-type -code to relevant condition category

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Notes

General instructions on how these codes are used.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name M34, its category, or a range that includes it.

Excludes1 3

These codes carry an Excludes1 note naming M34: they are not reported together with it, unless the two conditions are unrelated.

  • L93 Lupus erythematosus
    scleroderma (M34.-)
  • Block M60-M63 Disorders of muscles
    myopathy in scleroderma (M34.-)
  • L94 Other localized connective tissue disorders
    systemic connective tissue disorders (M30-M36) names M30-M36, which includes this code

Excludes2 4

These codes carry an Excludes2 note naming M34: its condition is not part of those codes, and both may be reported when the patient has both.

  • Chapter 9 (I00-I99) Diseases of the circulatory system
    systemic connective tissue disorders (M30-M36) names M30-M36, which includes this code
  • I77 Other disorders of arteries and arterioles
    collagen (vascular) diseases (M30-M36) names M30-M36, which includes this code
  • J82 Pulmonary eosinophilia, not elsewhere classified
    pulmonary eosinophilia due to systemic connective tissue disorders (M30-M36) names M30-M36, which includes this code
  • Chapter 12 (L00-L99) Diseases of the skin and subcutaneous tissue
    systemic connective tissue disorders (M30-M36) names M30-M36, which includes this code

Code First 2

These codes say to code first a condition named in the note, and M34 is one of the conditions named.

  • K31.84 Gastroparesis
    scleroderma (M34.-)
  • J84.170 Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere
    systemic connective tissue disorders (M30-M36) names M30-M36, which includes this code

Code Also 1

These codes say M34 may also be needed to fully describe the condition. The note gives no sequencing direction.

  • I27.21 Secondary pulmonary arterial hypertension
    systemic sclerosis (M34.-)

Patient EducationClinical

Scleroderma

Scleroderma means "hard skin." It's the name of an autoimmune disease that causes inflammation and thickening in the skin and other areas of the body. This inflammation causes you to have areas of tight, hard skin. Scleroderma may affect just one area of your body, or it can affect many systems in your body.

The full article covers:

  • What is scleroderma?
  • What are the types of scleroderma?
  • What causes scleroderma?
  • Who is more likely to develop scleroderma?
  • What are the symptoms of scleroderma?
  • How is scleroderma diagnosed?
  • What are the treatments for scleroderma?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About M34Overview

What is the ICD-10 code for systemic sclerosis [scleroderma]?

M34 is the ICD-10-CM category for systemic sclerosis [scleroderma], but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is M34 (Systemic sclerosis [scleroderma]) a billable code?

No. This is a category header that groups the codes for systemic sclerosis [scleroderma], and headers cannot be submitted on claims. Claims for systemic sclerosis [scleroderma] need a more specific code from this category, such as M34.0, M34.1, and M34.2.

Can M34 be reported with L94.0?

Not as a rule. The Excludes1 note on M34 lists "circumscribed scleroderma (L94.0)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).