Palindromic rheumatism, unspecified hand

This code signifies a diagnosis of palindromic rheumatism affecting an unspecified hand. Palindromic rheumatism is a rare, episodic inflammatory arthritis characterized by recurrent, self-limiting attacks of joint pain and swelling that resolve completely between episodes, without causing permanent joint damage.

Assign this code when documentation confirms a diagnosis of palindromic rheumatism with the affected site specified as the hand, but without further detail regarding laterality (e.g., right, left). This code is appropriate when the physician explicitly states "palindromic rheumatism of the hand" without specifying which hand.

• Ensure documentation clearly states "palindromic rheumatism" and specifies the hand as the affected joint.
• Avoid using this code if laterality (right or left hand) is documented; instead, use the more specific codes M12.341 or M12.342.
• Do not confuse with other forms of inflammatory arthritis, such as rheumatoid arthritis, which typically cause persistent joint inflammation and damage.