M05.66
Header — not billableRheumatoid arthritis of knee with involvement of other organs and systems
The ICD-10 code for rheumatoid arthritis of knee with involvement of other organs and systems is M05.66.
M05.66 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 3 more specific codes below.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- M05.60Rheumatoid arthritis of unspecified site with involvement of other organs and systems
- M05.61Rheumatoid arthritis of shoulder with involvement of other organs and systemsnon-billable header
- M05.62Rheumatoid arthritis of elbow with involvement of other organs and systemsnon-billable header
- M05.63Rheumatoid arthritis of wrist with involvement of other organs and systemsnon-billable header
- M05.64Rheumatoid arthritis of hand with involvement of other organs and systemsnon-billable header
- M05.65Rheumatoid arthritis of hip with involvement of other organs and systemsnon-billable header
- M05.67Rheumatoid arthritis of ankle and foot with involvement of other organs and systemsnon-billable header
- M05.69Rheumatoid arthritis of multiple sites with involvement of other organs and systems
- M05.66Rheumatoid arthritis of knee with involvement of other organs and systemsnon-billable header