CPT code 99455 denotes a clinician evaluation focused on assessing a patient for work-related or other medical reasons. It applies to both new and established patients and is not confined to a specific place of service, making it broadly applicable across outpatient clinics, occupational medicine programs, and other ambulatory care settings. Nationally, this code matters because it captures services that intersect clinical care and occupational or administrative evaluation needs, which affects coverage decisions, billing practices, and encounter documentation standards.

Key payers referenced in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the code's clinical role and service setting, typical payer coverage considerations, common modifiers associated with claim submissions, and where to look for related coding guidance. The publication summarizes benchmarks and policy considerations relevant to reimbursement and compliance, outlines common use cases in occupational and outpatient settings, and highlights documentation elements that are frequently reviewed by payers. Data not available in the input is noted where appropriate, and the content is intended for a national audience concerned with billing, coding, and policy for services that evaluate patients for work-related or medical reasons.