Palindromic rheumatism, multiple sites

This code represents palindromic rheumatism affecting multiple joints or anatomical regions. Palindromic rheumatism is a rare, episodic inflammatory arthritis characterized by recurrent, acute attacks of joint pain and swelling that resolve completely within days, often without residual damage. It is considered a precursor to rheumatoid arthritis in a significant percentage of cases.

Apply this code when documentation clearly indicates a diagnosis of palindromic rheumatism with involvement of more than one joint or site. This diagnosis is typically made by a rheumatologist based on clinical presentation, exclusion of other arthritides, and often serological markers like anti-CCP antibodies or rheumatoid factor, even if negative.

• Ensure documentation specifies "multiple sites" or lists several affected joints; otherwise, a site-specific code may be more appropriate.
• Do not confuse with other forms of inflammatory arthritis, such as rheumatoid arthritis (M05.-, M06.-) or psoriatic arthritis (L40.5-), unless the palindromic phase has clearly progressed to one of these conditions.
• Consider sequencing this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis when managing other related conditions.