A02.23

HCC Category Mapping

What This Code Means

This is a joint infection caused by Salmonella bacteria, which can cause inflammation, pain, and swelling in one or more joints. It typically develops as a complication of Salmonella food poisoning or other Salmonella infections in the body.

Coding Tips

• •Verify that the documentation confirms Salmonella as the causative organism of the arthritis; do not assume arthritis is Salmonella-related without explicit confirmation
• •Identify and code the specific joint(s) affected using the appropriate anatomical site codes, as A02.23 requires a fifth character to specify the site of arthritis

Clinical Significance

Salmonella arthritis represents direct joint infection by non-typhi Salmonella organisms, a condition particularly associated with sickle cell disease and immunocompromised states. Prompt diagnosis and treatment are critical to prevent permanent joint damage and systemic spread.

Documentation Requirements

• ✓Identification of Salmonella species from synovial fluid culture or strong clinical evidence
• ✓Specific joint(s) involved with physical examination findings
• ✓Synovial fluid analysis (cell count, Gram stain, culture results)
• ✓Imaging of affected joints if obtained
• ✓Documentation of predisposing conditions (sickle cell disease, HIV, immunosuppressive therapy)

Commonly Confused Codes