ICD-10 Code M00.29 – Other streptococcal polyarthritis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M00.29 – Other streptococcal polyarthritis
What it is
M00.29 identifies polyarthritis caused by streptococcal infection. Use it when documentation shows multiple joints are involved and the provider links the arthritis to streptococcus.
Clinical signs
Clinical features vary; refer to documentation. Typical records describe painful, swollen, warm, and restricted joints, with evidence of an active or recent streptococcal infection.
When to use this code
Use M00.29 when the clinician documents streptococcal polyarthritis affecting more than one joint. It is appropriate when the organism is streptococcal but not specified as a code-specific subtype. Code the confirmed infectious arthritis rather than nonspecific joint pain.
Do not use for
Do not use this code for arthritis without documented streptococcal cause, or for a single-joint infection. Check documentation if the record only says “polyarthritis” or names a different organism.
Coding tip
Verify both the streptococcal etiology and the multiple-joint involvement before assigning M00.29.