ICD‑10‑CM R20.9: Non‑Specific Facial Swelling

R20.9 – Unspecified disturbances of skin sensation (includes non‑specific facial swelling when no definitive etiology is identified).

Use only when swelling is a symptom without a confirmed diagnosis (e.g., awaiting workup). Once a cause is found (angioedema, cellulitis, fracture, salivary duct stone), replace with the specific diagnosis code.