M08.479

HCC Category Mapping

What This Code Means

A type of childhood arthritis affecting multiple joints in the ankle and foot area, where the specific side is not documented.

Coding Tips

• •Verify documentation specifies pauciarticular type (affecting 4 or fewer joints) before assigning this code
• •If laterality (left/right) is documented, use more specific codes M08.471 or M08.472 instead

Clinical Significance

Pauciarticular juvenile rheumatoid arthritis affecting unspecified ankle and foot joints represents a significant chronic inflammatory condition in pediatric patients. This diagnosis indicates the need for specialized rheumatologic care to prevent joint destruction, growth abnormalities, and functional impairment that can severely impact the child's mobility and quality of life.

Documentation Requirements

• ✓Physician diagnosis of juvenile rheumatoid arthritis with pauciarticular presentation
• ✓Documentation of ankle and/or foot joint involvement without laterality
• ✓Clinical evidence of inflammatory joint changes
• ✓Confirmation of pediatric onset (typically before age 16)
• ✓Laboratory studies supporting inflammatory arthritis when available
• ✓Physical examination documenting joint inflammation and limitation
• ✓Treatment plan addressing both inflammation control and functional preservation
• ✓Assessment of impact on mobility and daily activities

Commonly Confused Codes