ICD-10 Code A18.02 – Tuberculous arthritis of other joints (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A18.02 – Tuberculous arthritis of other joints
What it is
A18.02 identifies tuberculosis infection involving a joint other than the spine or hip. Use it when documentation shows tuberculous arthritis affecting another specific joint.
Clinical signs
Typical findings include chronic joint pain, swelling, stiffness, and reduced range of motion. Clinical features vary; refer to documentation for the involved joint and evidence of tuberculous infection.
When to use this code
Use this code when the provider documents tuberculous arthritis in a nonspinal, nonhip joint, such as a knee, ankle, shoulder, or wrist. It may also fit when pathology, imaging, or culture supports joint tuberculosis and the note names the joint.
If the record only says “TB arthritis” without joint detail, check documentation before assigning A18.02. Code the specific site documented, and do not assume a joint if the infection is limited to bone or soft tissue.
Do not use for
Do not use A18.02 for spinal tuberculosis, hip involvement, or nonspecific musculoskeletal TB without joint confirmation. Do not use it when the chart describes osteomyelitis only. Check documentation.
Coding tip
Verify the exact joint and whether the provider documents active tuberculosis before assigning A18.02.