ICD-10 Code A38 – Scarlet fever (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A38 – Scarlet fever
What it is
Scarlet fever is a streptococcal illness caused by toxin-producing group A streptococci. Use A38 when the record documents scarlet fever, typically with a scarlatiniform rash.
Clinical signs
Common findings include fever, sore throat, a red sandpaper-like rash, and a strawberry tongue. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider diagnoses scarlet fever or clearly documents a scarlatiniform illness due to streptococcal infection. It may appear with pharyngitis, tonsillitis, or other confirmed clinical descriptions of scarlet fever. Code the documented condition, and check documentation if the record is unclear.
Do not use for
Do not use A38 for simple strep throat without scarlet fever features, or for nonspecific rash illnesses. If the chart does not support scarlet fever, check documentation.
Coding tip
Assign A38 only when the provider links the rash and illness to scarlet fever, not just to streptococcal infection alone.