Patient presents with paronychia, an acute or chronic infection of the nail fold.  Symptoms include periungual erythema, edema, tenderness, and pain at the affected digit.  The patient reports onset approximately [duration] ago, possibly associated with [potential causative factors such as nail biting, manicure, trauma, or underlying conditions like diabetes].  Physical examination reveals [describe specific findings: e.g., purulent drainage, fluctuance, abscess formation, granulation tissue, involvement of proximal or lateral nail fold].  Differential diagnosis includes felon, herpetic whitlow, ingrown toenail, and onychomycosis.  Diagnosis of paronychia is made based on clinical presentation.  Treatment plan includes [specify treatment: e.g., warm soaks, topical antibiotics such as mupirocin, oral antibiotics if indicated such as cephalexin or dicloxacillin, incision and drainage if abscess present].  Patient education provided on proper nail hygiene, avoidance of trauma, and follow-up care.  ICD-10 code L03.0 (acute paronychia) or L03.1 (chronic paronychia) is appropriate, along with relevant procedure codes if incision and drainage is performed.  Follow-up scheduled in [duration] to assess treatment response.