CMS has found four CPT codes that have resulted in the greatest number of improper payments based on dollars paid or number of claims paid due to site-of-service errors:
• 99291 — critical care first hour
• 85097 — bone marrow interpretation
• 96118 — neuropsychological testing
• 90801 — psychiatric diagnostic interview examination
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OIG: Medicare Contractors Overpaid Physicians $28.8M in 2008-09 for Incorrectly Coded Services
