M33Header code — not billable

Dermatopolymyositis

Chapter
13. Diseases of the musculoskeletal system and connective tissue
Category
M33
Effective date
October 1, 2026

Related codes in category M33

Frequently asked questions

What is ICD-10 code M33?

M33 is an ICD-10-CM diagnosis code for Dermatopolymyositis.

Is M33 a billable code?

No. M33 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 in?

M33 falls under Chapter 13: Diseases of the musculoskeletal system and connective tissue.

When did M33 become effective?

M33 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to M33?

M33 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.