Hallux rigidus, right foot

This code signifies a painful degenerative arthritis affecting the metatarsophalangeal (MTP) joint of the great toe on the right foot. It is characterized by stiffness and limited range of motion, often progressing to a complete loss of joint movement. This condition results from cartilage damage and bone spur formation.

Apply this code when documentation clearly indicates a diagnosis of hallux rigidus specifically affecting the right great toe. This diagnosis is typically supported by physical examination findings of limited MTP joint dorsiflexion, pain, and radiographic evidence of joint space narrowing and osteophytes.

• Ensure laterality is explicitly documented as "right foot" to avoid unspecified coding.
• Distinguish from hallux valgus (bunion), which involves a different deformity of the great toe.
• Look for associated pain codes (e.g., M25.571) if pain is a primary complaint and separately documented.