M33.1Header code — not billable
Other dermatomyositis
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue
- Category
- M33
- Effective date
- October 1, 2026
Related codes in category M33
M33DermatopolymyositisM33.0Juvenile dermatomyositisM33.00Juvenile dermatomyositis, organ involvement unspecifiedYesM33.01Juvenile dermatomyositis with respiratory involvementYesM33.02Juvenile dermatomyositis with myopathyYesM33.03Juvenile dermatomyositis without myopathyYesM33.09Juvenile dermatomyositis with other organ involvementYesM33.10Other dermatomyositis, organ involvement unspecifiedYesM33.11Other dermatomyositis with respiratory involvementYesM33.12Other dermatomyositis with myopathyYesM33.13Other dermatomyositis without myopathyYesM33.19Other dermatomyositis with other organ involvementYes
Frequently asked questions
What is ICD-10 code M33.1?
M33.1 is an ICD-10-CM diagnosis code for Other dermatomyositis.
Is M33.1 a billable code?
No. M33.1 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is M33.1 in?
M33.1 falls under Chapter 13: Diseases of the musculoskeletal system and connective tissue.
When did M33.1 become effective?
M33.1 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to M33.1?
M33.1 belongs to category M33, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.