Systemic connective tissue disorders (M30-M36) ICD-10-CM
The M30–M36 section covers systemic connective tissue disorders with 101 ICD-10-CM diagnosis codes, of which 84 are billable in fiscal year 2026. The section is organized into the 7 code ranges listed below.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- autoimmune disease NOS
- collagen (vascular) disease NOS
- systemic autoimmune disease
- systemic collagen (vascular) disease
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- autoimmune disease, single organ or single cell-type -code to relevant condition category
Code Ranges in This Section 7 ranges · 101 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the M30–M36 Code Range
ICD-10 codes M30-M36 cover systemic connective tissue disorders, which include a variety of autoimmune and inflammatory diseases affecting multiple organs and tissues, such as polyarteritis nodosa, systemic lupus erythematosus, dermatomyositis, systemic sclerosis, and Sjogren syndrome.
This range specifically codes for complex connective tissue disorders characterized by inflammation and necrosis of blood vessels (vasculitis), muscle inflammation (myopathy), and involvement of organs like lungs, kidneys, and skin. For instance, M30.0 identifies polyarteritis nodosa and related medium-sized vessel vasculitis conditions, while M32. covers systemic lupus erythematosus (SLE), including drug-induced forms and organ-specific complications such as lupus nephritis and lung involvement. Dermatomyositis and polymyositis fall under M33, detailing juvenile and adult forms with or without muscle weakness. Systemic sclerosis (scleroderma), noted in M34, includes subtypes like CREST syndrome and drug-induced cases. Other disorders in this chapter like M35.0 describe Sjogren syndrome in various organ involvements, and M35.2 codes Behcet's disease, a multisystem inflammatory disorder. These codes aid in precise classification of connective tissue diseases based on clinical presentation and organ system involvement to guide treatment and research.
Questions About This Page
How many codes are in the M30-M36 range?
The M30-M36 range contains 101 ICD-10-CM diagnosis codes in FY 2026. 84 of them are billable, and the rest are category headers that organize the section.
What conditions does M30-M36 cover?
The range covers systemic connective tissue disorders. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
