**J02 — Acute pharyngitis** covers acute inflammation of the throat (sore throat). Sub-codes specify the cause: J02.0 (streptococcal), J02.8 (other specified organisms), J02.9 (acute pharyngitis, unspecified).
One of the top primary-care diagnoses; over 90% of cases in adults are viral, but rapid antigen and culture testing are recommended when streptococcal pharyngitis is suspected.
Belongs to **Chapter J** — Diseases of the respiratory system (J00-J99).
