ICD-10 Code M00.259 – Other streptococcal arthritis, unspecified hip (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M00.259 – Other streptococcal arthritis, unspecified hip
What it is
M00.259 identifies a streptococcal infection causing arthritis in the hip joint, with the hip side not specified. Use it when the record documents streptococcal septic arthritis affecting an unspecified hip.
Clinical signs
Typical findings include hip pain, reduced range of motion, swelling, and difficulty bearing weight. Clinical features vary; refer to documentation for the organism, joint involved, and whether the hip is left, right, or unspecified.
When to use this code
Use this code when the provider documents streptococcal arthritis of the hip and does not identify the side. It also fits when the note states other streptococcal arthritis of the hip without a more specific organism code. Check documentation if the record only says septic arthritis or infection without naming streptococcus.
Do not use for
Do not use it for non-streptococcal septic arthritis, inflammatory arthritis, or hip pain without infection. If the hip side is documented, select the laterality-specific code instead.
Coding tip
Verify both the organism and the joint laterality in the provider note before assigning M00.259.