M33.2

Non-Billable

ChapterM00–M99

Ranksubcategory

Official Description

Polymyositis

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Non-billable category (requires more specific sub-code).
•Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99).

General instructions are available for the parent sections:

View CH13 Notes View M30-M36 Notes

Clinical Hierarchy

CH13Diseases of the musculoskeletal system and connective tissue (M00-M99)

M30-M36Systemic connective tissue disorders (M30-M36)

M33Dermatopolymyositis

M33.2Polymyositis

M33.20Polymyositis, organ involvement unspecified

M33.21Polymyositis with respiratory involvement

M33.22Polymyositis with myopathy

M33.29Polymyositis with other organ involvement

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to M33.2:

blockM30-M36

Systemic connective tissue disorders (M30-M36)

View context instructions

chapterCH13

Diseases of the musculoskeletal system and connective tissue (M00-M99)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to M33.2. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

4 raw paths

Polymyositis (acute) (chronic) (hemorrhagic)4 unique routes

Direct index entry→M33.2

with(3 variants)

myopathy→M33.2

respiratory involvement→M33.2

specified organ involvement NEC→M33.2

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Polymyositis.

Search PCS Codes