M33.2
⚠ Non-billable (Header)Polymyositis
Diseases of the musculoskeletal system and connective tissue (M00-M99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
Child Codes (4)
Clinical Description
ICD-10-CM code M33.2 represents polymyositis. This code falls under the Diseases of the musculoskeletal system and connective tissue (M00-M99) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.
This is a 5-character code at the 4th level of specificity. There are 4 more specific child codes under M33.2.
Frequently Asked Questions
What is ICD-10 code M33.2?
ICD-10-CM code M33.2 is "Polymyositis". It belongs to the category: Diseases of the musculoskeletal system and connective tissue (M00-M99).
Is M33.2 a billable ICD-10 code?
No, M33.2 is a non-billable header code. A more specific child code must be used for billing.
Related Codes in M33
Other codes in the same category that may be relevant for differential coding:
🧪 Validate Combinations
Add M33.2 to the Excludes Checker to validate against your full code list.
Open in Checker →Code Information
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)