{
  "study": {
    "slug": "part-d-prescribing",
    "title": "The Most Prescribed Drugs in Medicare Part D (2024)",
    "url": "https://fonteum.com/research/part-d-prescribing",
    "methodology_version": "part-d-prescribing/v1"
  },
  "data_as_of": "2026-07-14",
  "temporal_coverage": "2024",
  "sources": [
    {
      "name": "CMS Medicare Part D Prescribers — by Provider and Drug, data year 2024",
      "publisher": "U.S. Centers for Medicare & Medicaid Services",
      "url": "https://data.cms.gov/provider-summary-by-type-of-service/medicare-part-d-prescribers/medicare-part-d-prescribers-by-provider-and-drug",
      "release_date": "2026-04-04",
      "retrieved_at": "2026-07-14",
      "license": "U.S. Government Works (17 U.S.C. §105)"
    }
  ],
  "headline": {
    "data_year": 2024,
    "total_records": 28023892,
    "distinct_prescribers": 1139455,
    "distinct_brand_names": 3055,
    "distinct_generic_names": 1823,
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    "total_drug_cost_usd": 226740902131,
    "total_day_supply": 77433992533,
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    "generic_cost_usd": 22385860693,
    "brand_claims": 353740012,
    "brand_cost_usd": 204355041438
  },
  "sections": [
    {
      "id": "top_by_claims",
      "label": "Most-prescribed drugs by claim count",
      "columns": [
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        "generic_name",
        "claims",
        "drug_cost_usd"
      ],
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          "brand_name": "Amlodipine Besylate",
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        {
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        {
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        {
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        {
          "brand_name": "Metoprolol Succinate",
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        },
        {
          "brand_name": "Rosuvastatin Calcium",
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        {
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        {
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        {
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        {
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        {
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        {
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        {
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        {
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        {
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        {
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        {
          "brand_name": "Simvastatin",
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        {
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        {
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      ]
    },
    {
      "id": "top_by_cost",
      "label": "Costliest drugs by total drug cost",
      "columns": [
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        "generic_name",
        "claims",
        "drug_cost_usd"
      ],
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        {
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        {
          "brand_name": "Xarelto",
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        {
          "brand_name": "Trelegy Ellipta",
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        {
          "brand_name": "Trulicity",
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        {
          "brand_name": "Farxiga",
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        {
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        {
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        {
          "brand_name": "Januvia",
          "generic_name": "Sitagliptin Phosphate",
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        {
          "brand_name": "Xtandi",
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        {
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        {
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        {
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    {
      "id": "by_specialty",
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          "specialty": "Epileptologists",
          "claims": 13007,
          "drug_cost_usd": 7492884
        },
        {
          "specialty": "Medical Genetics, Ph.D. Medical Genetics",
          "claims": 12853,
          "drug_cost_usd": 298353
        },
        {
          "specialty": "Neuromusculoskeletal Medicine, Sports Medicine",
          "claims": 12415,
          "drug_cost_usd": 705248
        },
        {
          "specialty": "Dental Hygienist",
          "claims": 11050,
          "drug_cost_usd": 252778
        },
        {
          "specialty": "Behavior Analyst",
          "claims": 10678,
          "drug_cost_usd": 703676
        },
        {
          "specialty": "Chiropractic",
          "claims": 10404,
          "drug_cost_usd": 586499
        },
        {
          "specialty": "Pharmacy",
          "claims": 7904,
          "drug_cost_usd": 1444400
        },
        {
          "specialty": "Contractor",
          "claims": 7195,
          "drug_cost_usd": 242484
        },
        {
          "specialty": "Health Maintenance Organization",
          "claims": 6450,
          "drug_cost_usd": 223912
        },
        {
          "specialty": "Acupuncturist",
          "claims": 5710,
          "drug_cost_usd": 236256
        },
        {
          "specialty": "Hospital",
          "claims": 5352,
          "drug_cost_usd": 788261
        },
        {
          "specialty": "Colon & Rectal Surgery",
          "claims": 5210,
          "drug_cost_usd": 347354
        },
        {
          "specialty": "Community Health Worker",
          "claims": 5139,
          "drug_cost_usd": 278310
        },
        {
          "specialty": "Program of All-Inclusive Care for the Elderly (PACE) Provider Organization",
          "claims": 4759,
          "drug_cost_usd": 464317
        },
        {
          "specialty": "Thoracic Surgery (Cardiothoracic Vascular Surgery)",
          "claims": 4677,
          "drug_cost_usd": 263958
        },
        {
          "specialty": "Community/Behavioral Health",
          "claims": 4304,
          "drug_cost_usd": 308332
        },
        {
          "specialty": "Licensed Clinical Social Worker",
          "claims": 4070,
          "drug_cost_usd": 322289
        },
        {
          "specialty": "Psychologist",
          "claims": 4047,
          "drug_cost_usd": 407563
        },
        {
          "specialty": "General Acute Care Hospital",
          "claims": 3737,
          "drug_cost_usd": 520489
        },
        {
          "specialty": "Midwife",
          "claims": 3709,
          "drug_cost_usd": 313833
        },
        {
          "specialty": "Integrative Medicine",
          "claims": 2936,
          "drug_cost_usd": 342645
        },
        {
          "specialty": "Physical Medicine & Rehabilitation",
          "claims": 2655,
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        },
        {
          "specialty": "Other Clinic/Center",
          "claims": 2289,
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        },
        {
          "specialty": "Unknown Supplier/Provider Specialty",
          "claims": 2071,
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        },
        {
          "specialty": "Military Health Care Provider",
          "claims": 1453,
          "drug_cost_usd": 60839
        },
        {
          "specialty": "Rehabilitation Practitioner",
          "claims": 1436,
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        },
        {
          "specialty": "Counselor",
          "claims": 1372,
          "drug_cost_usd": 60489
        },
        {
          "specialty": "Oral Medicinist",
          "claims": 1351,
          "drug_cost_usd": 43947
        },
        {
          "specialty": "Marriage and Family Therapist",
          "claims": 1310,
          "drug_cost_usd": 24536
        },
        {
          "specialty": "Opioid Treatment Program",
          "claims": 1190,
          "drug_cost_usd": 53955
        },
        {
          "specialty": "Oral and Maxillofacial Pathology",
          "claims": 983,
          "drug_cost_usd": 26650
        },
        {
          "specialty": "Specialist/Technologist",
          "claims": 921,
          "drug_cost_usd": 140769
        },
        {
          "specialty": "Dental Assistant",
          "claims": 851,
          "drug_cost_usd": 3140
        },
        {
          "specialty": "Homeopath",
          "claims": 621,
          "drug_cost_usd": 38051
        },
        {
          "specialty": "Pharmacy Technician",
          "claims": 621,
          "drug_cost_usd": 126354
        },
        {
          "specialty": "Ambulatory Surgical Center",
          "claims": 599,
          "drug_cost_usd": 3758
        },
        {
          "specialty": "Denturist",
          "claims": 572,
          "drug_cost_usd": 2298
        },
        {
          "specialty": "Clinical Pharmacology",
          "claims": 533,
          "drug_cost_usd": 90972
        },
        {
          "specialty": "Durable Medical Equipment & Medical Supplies",
          "claims": 492,
          "drug_cost_usd": 1699
        },
        {
          "specialty": "Case Manager/Care Coordinator",
          "claims": 461,
          "drug_cost_usd": 336361
        },
        {
          "specialty": "Orofacial Pain",
          "claims": 381,
          "drug_cost_usd": 6998
        },
        {
          "specialty": "Physical Therapist in Private Practice",
          "claims": 379,
          "drug_cost_usd": 12168
        },
        {
          "specialty": "Registered Dietitian or Nutrition Professional",
          "claims": 358,
          "drug_cost_usd": 7655
        },
        {
          "specialty": "Peer Specialist",
          "claims": 353,
          "drug_cost_usd": 60063
        },
        {
          "specialty": "Medical Toxicology",
          "claims": 336,
          "drug_cost_usd": 32708
        },
        {
          "specialty": "Independent Medical Examiner",
          "claims": 326,
          "drug_cost_usd": 8631
        },
        {
          "specialty": "Licensed Vocational Nurse",
          "claims": 319,
          "drug_cost_usd": 4786
        },
        {
          "specialty": "Mass Immunizer Roster Biller",
          "claims": 299,
          "drug_cost_usd": 68323
        },
        {
          "specialty": "Homemaker",
          "claims": 253,
          "drug_cost_usd": 42602
        },
        {
          "specialty": "Advanced Practice Dental Therapist",
          "claims": 236,
          "drug_cost_usd": 866
        },
        {
          "specialty": "Psychoanalyst",
          "claims": 234,
          "drug_cost_usd": 15258
        },
        {
          "specialty": "Naprapath",
          "claims": 209,
          "drug_cost_usd": 6847
        },
        {
          "specialty": "Social Worker",
          "claims": 208,
          "drug_cost_usd": 7549
        },
        {
          "specialty": "Specialist/Technologist, Other",
          "claims": 208,
          "drug_cost_usd": 17047
        },
        {
          "specialty": "Pediatrics",
          "claims": 185,
          "drug_cost_usd": 1942
        },
        {
          "specialty": "Preferred Provider Organization",
          "claims": 176,
          "drug_cost_usd": 2521
        },
        {
          "specialty": "Radiology",
          "claims": 171,
          "drug_cost_usd": 38257
        },
        {
          "specialty": "Intensive Cardiac Rehabilitation",
          "claims": 146,
          "drug_cost_usd": 87777
        },
        {
          "specialty": "Technician",
          "claims": 141,
          "drug_cost_usd": 1253
        },
        {
          "specialty": "Periodontics",
          "claims": 140,
          "drug_cost_usd": 324
        },
        {
          "specialty": "Skilled Nursing Facility",
          "claims": 100,
          "drug_cost_usd": 4385
        },
        {
          "specialty": "Prevention Professional",
          "claims": 98,
          "drug_cost_usd": 516
        },
        {
          "specialty": "Substance Abuse Rehabilitation Facility",
          "claims": 93,
          "drug_cost_usd": 47003
        },
        {
          "specialty": "Oral Medicine",
          "claims": 90,
          "drug_cost_usd": 1665
        },
        {
          "specialty": "Occupational Therapist in Private Practice",
          "claims": 63,
          "drug_cost_usd": 753
        },
        {
          "specialty": "Emergency Medical Technician, Basic",
          "claims": 63,
          "drug_cost_usd": 688
        },
        {
          "specialty": "Anesthesiology Assistant",
          "claims": 63,
          "drug_cost_usd": 1580
        },
        {
          "specialty": "Public Health or Welfare Agency",
          "claims": 61,
          "drug_cost_usd": 11209
        },
        {
          "specialty": "Speech Language Pathologist",
          "claims": 58,
          "drug_cost_usd": 8733
        },
        {
          "specialty": "Religious Nonmedical Nursing Personnel",
          "claims": 56,
          "drug_cost_usd": 4097
        },
        {
          "specialty": "Dental Laboratory Technician",
          "claims": 56,
          "drug_cost_usd": 189
        },
        {
          "specialty": "Clinical Medical Laboratory",
          "claims": 51,
          "drug_cost_usd": 3464
        },
        {
          "specialty": "Home Health Aide",
          "claims": 49,
          "drug_cost_usd": 142
        },
        {
          "specialty": "Prosthodontics",
          "claims": 49,
          "drug_cost_usd": 1085
        },
        {
          "specialty": "Nutritionist",
          "claims": 46,
          "drug_cost_usd": 637
        },
        {
          "specialty": "Occupational Therapy Assistant",
          "claims": 42,
          "drug_cost_usd": 288
        },
        {
          "specialty": "Respite Care",
          "claims": 41,
          "drug_cost_usd": 840
        },
        {
          "specialty": "Exclusive Provider Organization",
          "claims": 40,
          "drug_cost_usd": 175
        },
        {
          "specialty": "Midwife, Lay",
          "claims": 31,
          "drug_cost_usd": 302
        },
        {
          "specialty": "Dental Therapist",
          "claims": 30,
          "drug_cost_usd": 50
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        {
          "specialty": "Electrodiagnostic Medicine",
          "claims": 30,
          "drug_cost_usd": 756
        },
        {
          "specialty": "Technician, Health Information",
          "claims": 26,
          "drug_cost_usd": 357
        },
        {
          "specialty": "Massage Therapist",
          "claims": 25,
          "drug_cost_usd": 24
        },
        {
          "specialty": "Phlebology",
          "claims": 13,
          "drug_cost_usd": 80
        },
        {
          "specialty": "Eyewear Supplier",
          "claims": 12,
          "drug_cost_usd": 144
        },
        {
          "specialty": "Home Health",
          "claims": 12,
          "drug_cost_usd": 294
        },
        {
          "specialty": "Physical Therapy Assistant",
          "claims": 12,
          "drug_cost_usd": 91
        },
        {
          "specialty": "Radiation Therapy Center",
          "claims": 12,
          "drug_cost_usd": 559
        },
        {
          "specialty": "Chore Provider",
          "claims": 11,
          "drug_cost_usd": 31
        }
      ]
    },
    {
      "id": "by_state",
      "label": "Claims and cost by prescriber state",
      "columns": [
        "state",
        "claims",
        "drug_cost_usd"
      ],
      "rows": [
        {
          "state": "CA",
          "claims": 129565592,
          "drug_cost_usd": 21262400165
        },
        {
          "state": "FL",
          "claims": 113582265,
          "drug_cost_usd": 16838937918
        },
        {
          "state": "TX",
          "claims": 98638359,
          "drug_cost_usd": 15746441934
        },
        {
          "state": "NY",
          "claims": 95240368,
          "drug_cost_usd": 18174131281
        },
        {
          "state": "PA",
          "claims": 72980145,
          "drug_cost_usd": 11128347140
        },
        {
          "state": "OH",
          "claims": 62294899,
          "drug_cost_usd": 9043071424
        },
        {
          "state": "NC",
          "claims": 52430568,
          "drug_cost_usd": 8138215348
        },
        {
          "state": "IL",
          "claims": 51867241,
          "drug_cost_usd": 7536982736
        },
        {
          "state": "MI",
          "claims": 49623865,
          "drug_cost_usd": 7821347989
        },
        {
          "state": "GA",
          "claims": 47568589,
          "drug_cost_usd": 7304129570
        },
        {
          "state": "TN",
          "claims": 38950358,
          "drug_cost_usd": 5659749785
        },
        {
          "state": "NJ",
          "claims": 36124998,
          "drug_cost_usd": 6263635160
        },
        {
          "state": "MO",
          "claims": 35463463,
          "drug_cost_usd": 4833468353
        },
        {
          "state": "IN",
          "claims": 35193853,
          "drug_cost_usd": 5190809669
        },
        {
          "state": "MA",
          "claims": 32361931,
          "drug_cost_usd": 5922202143
        },
        {
          "state": "VA",
          "claims": 31922467,
          "drug_cost_usd": 4685929476
        },
        {
          "state": "KY",
          "claims": 29539412,
          "drug_cost_usd": 3992210902
        },
        {
          "state": "AL",
          "claims": 29065240,
          "drug_cost_usd": 4397971083
        },
        {
          "state": "PR",
          "claims": 28752106,
          "drug_cost_usd": 2641232871
        },
        {
          "state": "WI",
          "claims": 27394211,
          "drug_cost_usd": 3840695530
        },
        {
          "state": "LA",
          "claims": 26733751,
          "drug_cost_usd": 3909690765
        },
        {
          "state": "SC",
          "claims": 26346501,
          "drug_cost_usd": 4166797794
        },
        {
          "state": "AZ",
          "claims": 25708782,
          "drug_cost_usd": 4104362870
        },
        {
          "state": "WA",
          "claims": 24783752,
          "drug_cost_usd": 3562222029
        },
        {
          "state": "MN",
          "claims": 23094567,
          "drug_cost_usd": 3286593997
        },
        {
          "state": "MD",
          "claims": 19675615,
          "drug_cost_usd": 3420670237
        },
        {
          "state": "OK",
          "claims": 18322879,
          "drug_cost_usd": 2667189115
        },
        {
          "state": "AR",
          "claims": 18241272,
          "drug_cost_usd": 2169438737
        },
        {
          "state": "CT",
          "claims": 17035961,
          "drug_cost_usd": 3244608255
        },
        {
          "state": "MS",
          "claims": 16922230,
          "drug_cost_usd": 2244482966
        },
        {
          "state": "CO",
          "claims": 16573710,
          "drug_cost_usd": 2737455389
        },
        {
          "state": "IA",
          "claims": 16509676,
          "drug_cost_usd": 1964928631
        },
        {
          "state": "OR",
          "claims": 16099092,
          "drug_cost_usd": 2292723350
        },
        {
          "state": "KS",
          "claims": 14430363,
          "drug_cost_usd": 1876455871
        },
        {
          "state": "WV",
          "claims": 11351963,
          "drug_cost_usd": 1496997308
        },
        {
          "state": "NV",
          "claims": 9980111,
          "drug_cost_usd": 1554229839
        },
        {
          "state": "NE",
          "claims": 9542119,
          "drug_cost_usd": 1273191618
        },
        {
          "state": "UT",
          "claims": 8683564,
          "drug_cost_usd": 1243336040
        },
        {
          "state": "ID",
          "claims": 7048626,
          "drug_cost_usd": 991203715
        },
        {
          "state": "NM",
          "claims": 6903978,
          "drug_cost_usd": 947085835
        },
        {
          "state": "ME",
          "claims": 6630454,
          "drug_cost_usd": 1080557534
        },
        {
          "state": "NH",
          "claims": 5823419,
          "drug_cost_usd": 851255911
        },
        {
          "state": "RI",
          "claims": 5643841,
          "drug_cost_usd": 753138286
        },
        {
          "state": "DE",
          "claims": 4469302,
          "drug_cost_usd": 734247072
        },
        {
          "state": "MT",
          "claims": 4467425,
          "drug_cost_usd": 525099676
        },
        {
          "state": "SD",
          "claims": 4301083,
          "drug_cost_usd": 549489221
        },
        {
          "state": "HI",
          "claims": 3818948,
          "drug_cost_usd": 780970047
        },
        {
          "state": "ND",
          "claims": 3786445,
          "drug_cost_usd": 412252334
        },
        {
          "state": "VT",
          "claims": 2571367,
          "drug_cost_usd": 416696788
        },
        {
          "state": "DC",
          "claims": 1896979,
          "drug_cost_usd": 553407537
        },
        {
          "state": "WY",
          "claims": 1785327,
          "drug_cost_usd": 189691986
        },
        {
          "state": "AK",
          "claims": 1471084,
          "drug_cost_usd": 265514493
        },
        {
          "state": "VI",
          "claims": 170840,
          "drug_cost_usd": 28807658
        },
        {
          "state": "GU",
          "claims": 85921,
          "drug_cost_usd": 6477420
        },
        {
          "state": "ZZ",
          "claims": 42837,
          "drug_cost_usd": 3877351
        },
        {
          "state": "XX",
          "claims": 39868,
          "drug_cost_usd": 7119316
        },
        {
          "state": "AE",
          "claims": 31023,
          "drug_cost_usd": 1541925
        },
        {
          "state": "AP",
          "claims": 28641,
          "drug_cost_usd": 4171280
        },
        {
          "state": "MP",
          "claims": 13045,
          "drug_cost_usd": 944327
        },
        {
          "state": "AA",
          "claims": 2503,
          "drug_cost_usd": 67105
        },
        {
          "state": "FM",
          "claims": 13,
          "drug_cost_usd": 26
        }
      ]
    }
  ],
  "limitations": [
    "Gross cost, not net. These dollars are before confidential manufacturer rebates, which are largest for brand drugs; the rankings hold, the absolute totals overstate net spending.",
    "One data year, Medicare only. Part D covers Medicare beneficiaries — mostly people 65+ or with disabilities — not the whole U.S. population, so 'most-prescribed' means most-prescribed to seniors.",
    "Small-volume suppression. CMS removes any prescriber-drug row with fewer than 11 claims before publishing and suppresses beneficiary counts under 11, so totals slightly understate the true universe.",
    "Brand vs generic is inferred. The file carries no explicit flag; it is inferred from whether the brand and generic names match, the standard CMS approach. Authorized generics and combination products can land on the other side of the line.",
    "Drug rankings group on the published brand-name and generic-name pair, so a molecule sold under several brands appears as several rows.",
    "Aggregate-only, no quality claim. Fonteum does not name, rank, or rate any prescriber here, and prescribing volume is not a measure of care quality."
  ],
  "reproducible_sql": "-- Headline: claims + cost, generic vs brand (one pass)\nSELECT\n  count(*)                                                              AS rows,\n  sum(total_claims)                                                     AS claims,\n  round(sum(total_drug_cost))                                          AS drug_cost,\n  sum(total_claims) FILTER (WHERE lower(brand_name)=lower(generic_name)) AS generic_claims,\n  round(sum(total_drug_cost) FILTER\n        (WHERE lower(brand_name)=lower(generic_name)))                 AS generic_cost\nFROM cms_part_d_prescribers\nWHERE data_year = 2024;\n\n-- Most-prescribed drugs (top 25 by claims)\nSELECT brand_name, generic_name,\n  sum(total_claims)               AS claims,\n  round(sum(total_drug_cost))     AS cost\nFROM cms_part_d_prescribers\nWHERE data_year = 2024\nGROUP BY brand_name, generic_name\nORDER BY claims DESC\nLIMIT 25;\n\n-- Costliest drugs (top 25 by drug cost)\nSELECT brand_name, generic_name,\n  sum(total_claims)               AS claims,\n  round(sum(total_drug_cost))     AS cost\nFROM cms_part_d_prescribers\nWHERE data_year = 2024\nGROUP BY brand_name, generic_name\nORDER BY cost DESC\nLIMIT 25;",
  "license": "U.S. Government Works (17 U.S.C. §105)",
  "generated_by": "Fonteum — https://fonteum.com",
  "notes": "Aggregate, source-traced figures frozen to the as-of date above. Re-derive by running the published query against the named source file; no per-person records are included."
}
