Inflammatory polyarthropathy

This code signifies a chronic inflammatory condition affecting five or more joints, characterized by pain, swelling, and stiffness. It represents a systemic autoimmune process leading to widespread joint inflammation, distinct from degenerative joint diseases.

Apply this code when documentation clearly indicates a diagnosis of inflammatory polyarthropathy, often without further specification of the underlying cause (e.g., rheumatoid arthritis). This is appropriate when the physician has diagnosed a generalized inflammatory joint condition affecting multiple joints, but a more specific diagnosis isn't yet established or documented.

• Do not use this code if a more specific inflammatory polyarthropathy (e.g., rheumatoid arthritis with specific organ involvement) is documented; instead, code the specific condition.
• Carefully review documentation to ensure the "inflammatory" nature of the polyarthropathy is explicitly stated or clearly implied by clinical findings.
• Remember the Excludes1 note: never code this alongside M13.0 (Polyarthritis, unspecified).