M05.661
Billable codeRheumatoid arthritis of right knee with involvement of other organs and systems
The ICD-10 code for rheumatoid arthritis of right knee with involvement of other organs and systems is M05.661.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- M05.662Rheumatoid arthritis of left knee with involvement of other organs and systems
- M05.669Rheumatoid arthritis of unspecified knee with involvement of other organs and systems
- M05.661Rheumatoid arthritis of right knee with involvement of other organs and systems
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 7142Approximate match
Associated MS-DRGs
M05.661 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.