M33.12 is the authoritative medical code for Other dermatomyositis with myopathy. This classification is used in medical billing and clinical recording to specify the clinical criteria for other dermatomyositis with myopathy (ICD-10-CM M33.12), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Other dermatomyositis with myopathy is a billable ICD-10-CM diagnosis code M33.12. Includes: autoimmune disease NOS; collagen vascular disease NOS; systemic autoimmune disease; systemic collagen vascular disease. Excludes1 (not coded here): autoimmune disease, single organ or single cell-type -code to relevant condition category.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for M33.12 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- autoimmune disease NOS
- collagen vascular disease NOS
- systemic autoimmune disease
- systemic collagen vascular disease
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- autoimmune disease, single organ or single cell-type -code to relevant condition category
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with M33.12?
Per Excludes1 instructions, M33.12 must not be reported with: autoimmune disease, single organ or single cell-type -code to relevant condition category.
Codes in This Family (22)
Official ICD-10-CM classifications in the same code family as M33.12, with their registry titles.
- M33 — Dermatopolymyositis
- M33.0 — Juvenile dermatomyositis
- M33.01 — Juvenile dermatomyositis with respiratory involvement
- M33.02 — Juvenile dermatomyositis with myopathy
- M33.03 — Juvenile dermatomyositis without myopathy
- M33.09 — Juvenile dermatomyositis with other organ involvement
- M33.1 — Other dermatomyositis
- M33.10 — Other dermatomyositis, organ involvement unspecified
- M33.11 — Other dermatomyositis with respiratory involvement
- M33.13 — Other dermatomyositis without myopathy
- M33.19 — Other dermatomyositis with other organ involvement
- M33.2 — Polymyositis
- M33.20 — Polymyositis, organ involvement unspecified
- M33.21 — Polymyositis with respiratory involvement
- M33.22 — Polymyositis with myopathy
- M33.29 — Polymyositis with other organ involvement
- M33.9 — Dermatopolymyositis, unspecified
- M33.90 — Dermatopolymyositis, unspecified, organ involvement unspecified
- M33.91 — Dermatopolymyositis, unspecified with respiratory involvement
- M33.92 — Dermatopolymyositis, unspecified with myopathy
- M33.93 — Dermatopolymyositis, unspecified without myopathy
- M33.99 — Dermatopolymyositis, unspecified with other organ involvement
Indexed Clinical Terms (4)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Dermatomucosomyositis, with, myopathy
- Dermatomyositis (acute) (chronic), specified NEC, with, myopathy
- Dermatopolymyositis, specified NEC, myopathy
- Poikilodermatomyositis, with, myopathy
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: