M05.46 – Rheumatoid myopathy with rheumatoid arthritis of knee
ICD-10-CM 2027 diagnosis code · Inflammatory polyarthropathies
- Code
M05.46(claims format:M0546)- Description
- Rheumatoid myopathy with rheumatoid arthritis of knee
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
- Block
- M05-M14 Inflammatory polyarthropathies
- Parent codes
- M05 › M05.4
Billable codes under M05.46
M05.46 is a header code and cannot be used on claims. Choose the most specific code:
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
M05 – Rheumatoid arthritis with rheumatoid factor
Index terms for M05.46
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in M05.4
- M05.40 – Rheumatoid myopathy with rheumatoid arthritis of unspecified siteBillable
- M05.41 – Rheumatoid myopathy with rheumatoid arthritis of shoulderHeader
- M05.42 – Rheumatoid myopathy with rheumatoid arthritis of elbowHeader
- M05.43 – Rheumatoid myopathy with rheumatoid arthritis of wristHeader
- M05.44 – Rheumatoid myopathy with rheumatoid arthritis of handHeader
- M05.45 – Rheumatoid myopathy with rheumatoid arthritis of hipHeader
- M05.47 – Rheumatoid myopathy with rheumatoid arthritis of ankle and footHeader
- M05.49 – Rheumatoid myopathy with rheumatoid arthritis of multiple sitesBillable
Frequently asked questions
What is ICD-10 code M05.46?
M05.46 is the ICD-10-CM code for rheumatoid myopathy with rheumatoid arthritis of knee, in the block M05-M14 (Inflammatory polyarthropathies).
Is M05.46 a billable code?
No. M05.46 is a header code with more specific child codes; report one of the billable codes listed above.
What category does M05.46 belong to?
It belongs to category M05 – Rheumatoid arthritis with rheumatoid factor.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.