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99354CPT
CPT 99354 — Prolonged Outpatient Service Add-On, First Hour (Largely Replaced by CPT 99417)
CPT code 99354 covers the first hour of prolonged outpatient evaluation and management services beyond the primary E&M code. Note: CPT 99417, introduced in 2021, has largely replaced 99354 in most payer mixes.
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