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2. ICD-10 Codes
3. Chapter - M00-M99
4. Section - M30-M36
5. Category - M33
6. M33.21

M33.21 - Polymyositis with respiratory involvement

• Applicable to Polymyositis with respiratory involvement
• The 2025 edition of ICD10-CM M33.21 became effective on October 1, 2024.
• This is the American ICD10-CM version of M33.21 - other international versions of ICD10 M33.21 may differ.
• M33.21 is a Billable / Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

The following codes above M33.21 contain annotation back-references that may be applicable to M33.21:

• Chapter: M00-M99 - Diseases of the musculoskeletal system and connective tissue
• Section: M30-M36 - Systemic connective tissue disorders
• Category: M33 - Dermatopolymyositis

Browse other similar CM codes:

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.