{"data":{"id":"us/42-cfr-428.100","jurisdiction":"us","citation":"42 CFR 428.100","heading":"Definitions.","body":"As used in this subpart, the following definitions apply:\nIndividual who uses such a drug or biological means a unique Medicare Part D beneficiary who was dispensed the Part D drug or biological that was covered by their Part D plan sponsor during the applicable period, identified using Prescription Drug Event (PDE) data with dates of service during the applicable period and with gross covered prescription drug costs greater than zero.\nGross covered prescription drug costs has the meaning set forth in § 423.308 of this chapter.","path":["Title 42—Public Health","CHAPTER IV—CENTERS FOR MEDICARE \u0026 MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER B—MEDICARE PROGRAM","PART 428—MEDICARE PART D DRUG INFLATION REBATE PROGRAM","Subpart B—Determination of Part D Rebatable Drugs"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-42.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:11Z","sha256":"a8d5a65eada29ef6091a0b0d128286007075ddf053b20320ccf51942a50973c5","source_id":"us-cfr","stale":true,"prev":"us/42-cfr-428.20","next":"us/42-cfr-428.101"},"notice":"GroundRules: Original legal text. Not legal advice."}