ICD-10 Code M00.2 – Other streptococcal arthritis and polyarthritis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M00.2 – Other streptococcal arthritis and polyarthritis
What it is
M00.2 identifies arthritis caused by streptococcal infection when the organism is not one of the specifically named streptococcal categories. It may involve one joint or multiple joints and reflects an infectious, not degenerative, process.
Clinical signs
Typical findings include painful, swollen, warm joints with reduced range of motion, often with acute onset. Clinical features vary; refer to documentation for the identified streptococcal source and whether one joint or several are involved.
When to use this code
Use M00.2 when the provider documents streptococcal septic arthritis or polyarthritis and does not name a more specific streptococcal type. It also fits when the record clearly links the joint infection to streptococcus and the case is not coded elsewhere.
Check documentation for the affected joint count, organism wording, and whether the infection is current and active. If the note only mentions a history of streptococcal infection without joint involvement, this code is not appropriate.
Do not use for
Do not use this code for noninfectious inflammatory arthritis, postinfectious arthritis without active joint infection, or arthritis caused by organisms other than streptococcus. Check documentation if the organism is unspecified.
Coding tip
Code the streptococcal arthritis only when the provider links the joint infection to streptococcus in the current encounter note.