M05.642 – Rheumatoid arthritis of left hand with involvement of other organs and systems
ICD-10-CM 2027 diagnosis code · Inflammatory polyarthropathies
ICD-10-CM code
M05.642
- Code
M05.642(claims format:M05642)- Description
- Rheumatoid arthritis of left hand with involvement of other organs and systems
- Short description
- Rheu arthritis of left hand w involv of organs and systems
- Billable
- Yes – valid for HIPAA-covered transactions
- 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 › M05.6 › M05.64
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
Excludes1 (not coded here):
M05.64 – Rheumatoid arthritis of hand with involvement of other organs and systems
Applicable to:
- Rheumatoid arthritis of metacarpus and phalanges with involvement of other organs and systems
Related codes in M05.64
Frequently asked questions
What is ICD-10 code M05.642?
M05.642 is the ICD-10-CM code for rheumatoid arthritis of left hand with involvement of other organs and systems, in the block M05-M14 (Inflammatory polyarthropathies).
Is M05.642 a billable code?
Yes. M05.642 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does M05.642 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.