M33.9

Non-billable

Dermatopolymyositis, unspecified

M33.9 is the ICD-10-CM code for Dermatopolymyositis, unspecified. It is a non-billable category code — use a more specific child code such as M33.90 for billing.

Status
Header (non-billable)
Chapter
M00-M99
Parent
M33
Subcodes
5
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code M33.9?
M33.9 is the ICD-10-CM code for "Dermatopolymyositis, unspecified". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M33.9 a billable code?
No — M33.9 is a non-billable header code. Use a more specific child code (such as M33.90) for billing.
What are the subcodes of M33.9?
M33.9 has 5 more specific child codes, including M33.90, M33.91, M33.92.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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