Payment overview · 2025
General Payments
$561.65
29 reported records · 9 companies
Healthcare provider profile · identity verified
Tyler Ray Williams, M.D.
Allopathic & Osteopathic Physicians|Internal Medicine · ROY, UT · NPI 1073798377
Verified facts
What the public records show
CMS Open Payments records show Tyler Ray Williams, M.D. received $561.65 in general payments during 2025 across 29 reported records.
PFIZER INC. accounted for 33.6% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 15 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Eliquis, Mounjaro, Ozempic, Synthroid.
ABBVIE INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported LINZESS as an associated drug or biological on 87954 records involving 21815 distinct recipient NPIs. Public Medicare Part D data also shows 20 claims for Linzess by this doctor in 2024.
ABBVIE INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported SYNTHROID as an associated drug or biological on 10655 records involving 4881 distinct recipient NPIs. Public Medicare Part D data also shows 84 claims for Synthroid by this doctor in 2024.
Janssen Pharmaceuticals, Inc reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported XARELTO as an associated drug or biological on 28 records involving 28 distinct recipient NPIs. Public Medicare Part D data also shows 54 claims for Xarelto by this doctor in 2024.
Lilly USA, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported JARDIANCE as an associated drug or biological on 47708 records involving 23833 distinct recipient NPIs. Public Medicare Part D data also shows 51 claims for Jardiance by this doctor in 2024.
Lilly USA, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported MOUNJARO as an associated drug or biological on 186719 records involving 66436 distinct recipient NPIs. Public Medicare Part D data also shows 47 claims for Mounjaro by this doctor in 2024.
Lilly USA, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported TRULICITY as an associated drug or biological on 71 records involving 57 distinct recipient NPIs. Public Medicare Part D data also shows 20 claims for Trulicity by this doctor in 2024.
Novo Nordisk Inc reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Ozempic as an associated drug or biological on 261625 records involving 77793 distinct recipient NPIs. Public Medicare Part D data also shows 250 claims for Ozempic by this doctor in 2024.
PFIZER INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported ELIQUIS as an associated drug or biological on 87112 records involving 36032 distinct recipient NPIs. Public Medicare Part D data also shows 194 claims for Eliquis by this doctor in 2024.
PFIZER INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported PAXLOVID as an associated drug or biological on 24465 records involving 15715 distinct recipient NPIs. Public Medicare Part D data also shows 20 claims for Paxlovid by this doctor in 2024.
These records do not establish that a payment influenced prescribing or medical care.
Separate record types
Research & Ownership
Research Payments (direct recipient): not present in the loaded data
Associated Research Funding (for example, named PI): not present in the loaded data
Ownership / Investment: not present in the loaded data
These categories are never added into the General Payments headline. Associated research funding must not be described as money the doctor personally received unless the source record supports that conclusion.
Who paid this doctor?
Companies in 2025 General Payments
| Reported company | Canonical company | Amount | Share | Records | Year |
|---|---|---|---|---|---|
| PFIZER INC. | Unresolved — no canonical attribution shown | $188.80 | 33.6% | 9 | 2025 |
| Amgen Inc. | Unresolved — no canonical attribution shown | $178.77 | 31.8% | 9 | 2025 |
| ABBVIE INC. | Unresolved — no canonical attribution shown | $62.34 | 11.1% | 3 | 2025 |
| Novartis Pharmaceuticals Corporation | Unresolved — no canonical attribution shown | $35.40 | 6.3% | 2 | 2025 |
| GlaxoSmithKline, LLC. | Unresolved — no canonical attribution shown | $33.41 | 6.0% | 2 | 2025 |
| Lilly USA, LLC | Unresolved — no canonical attribution shown | $16.55 | 3.0% | 1 | 2025 |
| Janssen Pharmaceuticals, Inc | Unresolved — no canonical attribution shown | $16.23 | 2.9% | 1 | 2025 |
| Novo Nordisk Inc | Unresolved — no canonical attribution shown | $16.09 | 2.9% | 1 | 2025 |
| Verity Pharmaceuticals Inc. | Unresolved — no canonical attribution shown | $14.06 | 2.5% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $561.65 | 29 |
A meal, consulting fee, royalty, and travel payment describe different kinds of reported relationships and should not be interpreted as equivalent.
Analysis 1 · Payment-linked products
Products named in Open Payments records
| Reported product | Type | Reported company | Related amount* | Records | Year |
|---|---|---|---|---|---|
| NURTEC ODT Normalized: nurtec odt |
Drug | PFIZER INC. | $188.80 | 9 | 2025 |
Source payment records
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| EVENITY Normalized: evenity |
Biological | Amgen Inc. | $178.77 | 9 | 2025 |
Source payment records
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| ELIQUIS Normalized: eliquis |
Drug | PFIZER INC. | $144.59 | 7 | 2025 |
Source payment records
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| UBRELVY Normalized: ubrelvy |
Drug | ABBVIE INC. | $62.34 | 3 | 2025 |
Source payment records
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| ZAVZPRET Normalized: zavzpret |
Drug | PFIZER INC. | $44.21 | 2 | 2025 |
Source payment records
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| LEQVIO Normalized: leqvio |
Drug | Novartis Pharmaceuticals Corporation | $35.40 | 2 | 2025 |
Source payment records
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| AREXVY Normalized: arexvy |
Biological | GlaxoSmithKline, LLC. | $33.41 | 2 | 2025 |
Source payment records
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| SHINGRIX Normalized: shingrix |
Biological | GlaxoSmithKline, LLC. | $33.41 | 2 | 2025 |
Source payment records
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| QULIPTA Normalized: qulipta |
Drug | ABBVIE INC. | $26.94 | 1 | 2025 |
Source payment records
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| SYNTHROID Normalized: synthroid |
Drug | ABBVIE INC. | $17.99 | 1 | 2025 |
Source payment records
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| PROLIA Normalized: prolia |
Biological | Amgen Inc. | $17.02 | 1 | 2025 |
Source payment records
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| MOUNJARO Normalized: mounjaro |
Drug | Lilly USA, LLC | $16.55 | 1 | 2025 |
Source payment records
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| SPRAVATO Normalized: spravato |
Drug | Janssen Pharmaceuticals, Inc | $16.23 | 1 | 2025 |
Source payment records
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| Ozempic Normalized: ozempic |
Drug | Novo Nordisk Inc | $16.09 | 1 | 2025 |
Source payment records
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| Tlando Normalized: tlando |
Drug | Verity Pharmaceuticals Inc. | $14.06 | 1 | 2025 |
Source payment records
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* Product-associated amounts are non-additive because one payment record may name more than one product.
These products were named on specific Open Payments records. A named product does not show that the payment influenced treatment or prescribing.
Public prescribing for products named in payments
| Open Payments product | Payment year | Part D brand | Part D year | Claims | Match method | Source |
|---|---|---|---|---|---|---|
| ELIQUIS eliquis |
2025 | Eliquis | 2024 | 194 | exact normalized | Medicare Part D |
| MOUNJARO mounjaro |
2025 | Mounjaro | 2024 | 47 | exact normalized | Medicare Part D |
| Ozempic ozempic |
2025 | Ozempic | 2024 | 250 | exact normalized | Medicare Part D |
| SYNTHROID synthroid |
2025 | Synthroid | 2024 | 84 | exact normalized | Medicare Part D |
The presence of the same drug in both datasets does not show that a payment caused or influenced a prescription.
Analysis 2 · Same-company prescribing overlap
Drugs reported in other payments from the same company that also appear in Medicare Part D
This analysis is independent from products named on this doctor’s individual payment records. A row appears only when the exact Open Payments reporting entity paid this doctor, that same reporting entity reported the drug or biological on at least 10 loaded General Payment records involving at least 2 distinct recipient NPIs, and this doctor has the same non-generic brand in public Part D data. This does not mean the company owns or manufactures the drug.
| Paying company | Payment year | Drug reported by same entity | Open Payments evidence | Part D | Claims | Beneficiaries |
|---|---|---|---|---|---|---|
| ABBVIE INC. Exact reporting entity; no affiliate inference |
2025 | LINZESS open payments reported associated product |
CMS Open Payments — General Payments 87954 supporting records · 21815 recipient NPIs · example record 1201352608 |
Linzess · 2024 Exact normalized brand match · 1 Part D row |
20 | suppressed by CMS |
| ABBVIE INC. Exact reporting entity; no affiliate inference |
2025 | SYNTHROID open payments reported associated product |
CMS Open Payments — General Payments 10655 supporting records · 4881 recipient NPIs · example record 1201352636 |
Synthroid · 2024 Exact normalized brand match · 1 Part D row |
84 | 20 |
| Janssen Pharmaceuticals, Inc Exact reporting entity; no affiliate inference |
2025 | XARELTO open payments reported associated product |
CMS Open Payments — General Payments 28 supporting records · 28 recipient NPIs · example record 1174296970 |
Xarelto · 2024 Exact normalized brand match · 1 Part D row |
54 | 16 |
| Lilly USA, LLC Exact reporting entity; no affiliate inference |
2025 | JARDIANCE open payments reported associated product |
CMS Open Payments — General Payments 47708 supporting records · 23833 recipient NPIs · example record 1186464557 |
Jardiance · 2024 Exact normalized brand match · 1 Part D row |
51 | 17 |
| Lilly USA, LLC Exact reporting entity; no affiliate inference |
2025 | MOUNJARO open payments reported associated product |
CMS Open Payments — General Payments 186719 supporting records · 66436 recipient NPIs · example record 1186464455 |
Mounjaro · 2024 Exact normalized brand match · 1 Part D row |
47 | 12 |
| Lilly USA, LLC Exact reporting entity; no affiliate inference |
2025 | TRULICITY open payments reported associated product |
CMS Open Payments — General Payments 71 supporting records · 57 recipient NPIs · example record 1186464601 |
Trulicity · 2024 Exact normalized brand match · 1 Part D row |
20 | suppressed by CMS |
| Novo Nordisk Inc Exact reporting entity; no affiliate inference |
2025 | Ozempic open payments reported associated product |
CMS Open Payments — General Payments 261625 supporting records · 77793 recipient NPIs · example record 1188130076 |
Ozempic · 2024 Exact normalized brand match · 1 Part D row |
250 | 43 |
| PFIZER INC. Exact reporting entity; no affiliate inference |
2025 | ELIQUIS open payments reported associated product |
CMS Open Payments — General Payments 87112 supporting records · 36032 recipient NPIs · example record 1228794063 |
Eliquis · 2024 Exact normalized brand match · 1 Part D row |
194 | 54 |
| PFIZER INC. Exact reporting entity; no affiliate inference |
2025 | PAXLOVID open payments reported associated product |
CMS Open Payments — General Payments 24465 supporting records · 15715 recipient NPIs · example record 1228794432 |
Paxlovid · 2024 Exact normalized brand match · 1 Part D row |
20 | 20 |
These facts do not show that a payment was for the drug, that the company owns or manufactures the drug, or that a payment caused or influenced prescribing.
Public Medicare Part D data
Provider-and-drug rows loaded for 2024
| Brand | Generic | Claims | Beneficiaries |
|---|---|---|---|
| Levothyroxine Sodium | Levothyroxine Sodium | 659 | 179 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 626 | 187 |
| Omeprazole | Omeprazole | 448 | 145 |
| Atorvastatin Calcium | Atorvastatin Calcium | 445 | 120 |
| Amlodipine Besylate | Amlodipine Besylate | 384 | 108 |
| Lisinopril | Lisinopril | 381 | 113 |
| Metformin Hcl Er | Metformin Hcl | 279 | 89 |
| Hydrochlorothiazide | Hydrochlorothiazide | 263 | 83 |
| Ozempic | Semaglutide | 250 | 43 |
| Simvastatin | Simvastatin | 245 | 69 |
| Sertraline Hcl | Sertraline Hcl | 227 | 68 |
| Gabapentin | Gabapentin | 226 | 67 |
| Potassium Chloride | Potassium Chloride | 222 | 66 |
| Metformin Hcl | Metformin Hcl | 211 | 59 |
| Losartan Potassium | Losartan Potassium | 198 | 58 |
| Trazodone Hcl | Trazodone Hcl | 198 | 66 |
| Eliquis | Apixaban | 194 | 54 |
| Valsartan | Valsartan | 185 | 50 |
| Zolpidem Tartrate | Zolpidem Tartrate | 181 | 53 |
| Escitalopram Oxalate | Escitalopram Oxalate | 169 | 48 |
| Tamsulosin Hcl | Tamsulosin Hcl | 162 | 53 |
| Pravastatin Sodium | Pravastatin Sodium | 128 | 34 |
| Metoprolol Succinate | Metoprolol Succinate | 114 | 37 |
| Tramadol Hcl | Tramadol Hcl | 114 | 30 |
| Duloxetine Hcl | Duloxetine Hcl | 106 | 26 |
| Glimepiride | Glimepiride | 106 | 30 |
| Pantoprazole Sodium | Pantoprazole Sodium | 104 | 31 |
| Furosemide | Furosemide | 97 | 27 |
| Bupropion Xl | Bupropion Hcl | 92 | 31 |
| Allopurinol | Allopurinol | 89 | 24 |
| Finasteride | Finasteride | 87 | 27 |
| Irbesartan | Irbesartan | 86 | 22 |
| Alendronate Sodium | Alendronate Sodium | 84 | 25 |
| Synthroid | Levothyroxine Sodium | 84 | 20 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 83 | 21 |
| Alprazolam | Alprazolam | 79 | 26 |
| Lorazepam | Lorazepam | 79 | 14 |
| Carvedilol | Carvedilol | 78 | 22 |
| Clonazepam | Clonazepam | 77 | 14 |
| Fluticasone Propionate | Fluticasone Propionate | 76 | 36 |
| Montelukast Sodium | Montelukast Sodium | 76 | 26 |
| Fluoxetine Hcl | Fluoxetine Hcl | 75 | 21 |
| Meloxicam | Meloxicam | 75 | 25 |
| Ezetimibe | Ezetimibe | 73 | 24 |
| Celecoxib | Celecoxib | 69 | 27 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 68 | 37 |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 64 | 20 |
| Spironolactone | Spironolactone | 64 | 20 |
| Donepezil Hcl | Donepezil Hcl | 63 | 20 |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 63 | 19 |
| Fenofibrate | Fenofibrate | 61 | 16 |
| Valsartan-Hydrochlorothiazide | Valsartan/Hydrochlorothiazide | 61 | 17 |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 60 | 39 |
| Solifenacin Succinate | Solifenacin Succinate | 60 | 21 |
| Pregabalin | Pregabalin | 58 | 15 |
| Clopidogrel | Clopidogrel Bisulfate | 56 | 17 |
| Xarelto | Rivaroxaban | 54 | 16 |
| Citalopram Hbr | Citalopram Hydrobromide | 53 | 15 |
| Ondansetron Hcl | Ondansetron Hcl | 52 | 20 |
| Bupropion Hcl Sr | Bupropion Hcl | 51 | 15 |
| Estradiol | Estradiol | 51 | 17 |
| Famotidine | Famotidine | 51 | 12 |
| Jardiance | Empagliflozin | 51 | 17 |
| Ipratropium Bromide | Ipratropium Bromide | 50 | 14 |
| Dextroamphetamine-Amphetamine | Dextroamphetamine/Amphetamine | 49 | suppressed |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 48 | suppressed |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 47 | 16 |
| Mounjaro | Tirzepatide | 47 | 12 |
| Warfarin Sodium | Warfarin Sodium | 45 | 12 |
| Telmisartan | Telmisartan | 44 | 13 |
| Prednisone | Prednisone | 43 | 34 |
| Tizanidine Hcl | Tizanidine Hcl | 43 | suppressed |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 40 | 31 |
| Testosterone Cypionate | Testosterone Cypionate | 40 | suppressed |
| Triamterene-Hydrochlorothiazid | Triamterene/Hydrochlorothiazid | 37 | 11 |
| Sulfamethoxazole-Trimethoprim | Sulfamethoxazole/Trimethoprim | 35 | 28 |
| Doxycycline Monohydrate | Doxycycline Monohydrate | 34 | 27 |
| Rizatriptan | Rizatriptan Benzoate | 33 | suppressed |
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 32 | suppressed |
| Methocarbamol | Methocarbamol | 31 | suppressed |
| Lantus Solostar | Insulin Glargine,hum.Rec.Anlog | 30 | suppressed |
| Benazepril Hcl | Benazepril Hcl | 29 | suppressed |
| Butalbital-Acetaminophen-Caffe | Butalb/Acetaminophen/Caffeine | 29 | suppressed |
| Metoprolol Tartrate | Metoprolol Tartrate | 29 | suppressed |
| Pramipexole Dihydrochloride | Pramipexole Di-Hcl | 29 | suppressed |
| Oxybutynin Chloride Er | Oxybutynin Chloride | 28 | suppressed |
| Myrbetriq | Mirabegron | 26 | suppressed |
| Lovastatin | Lovastatin | 25 | suppressed |
| Azithromycin | Azithromycin | 22 | 20 |
| Levofloxacin | Levofloxacin | 22 | 19 |
| Ramipril | Ramipril | 22 | suppressed |
| Toujeo Solostar | Insulin Glargine,hum.Rec.Anlog | 22 | suppressed |
| Symbicort | Budesonide/Formoterol Fumarate | 21 | suppressed |
| Amitriptyline Hcl | Amitriptyline Hcl | 20 | suppressed |
| Linzess | Linaclotide | 20 | suppressed |
| Nitrofurantoin Mono-Macro | Nitrofurantoin Monohyd/M-Cryst | 20 | 13 |
| Paxlovid | Nirmatrelvir/Ritonavir | 20 | 20 |
| Propranolol Hcl Er | Propranolol Hcl | 20 | suppressed |
| Trulicity | Dulaglutide | 20 | suppressed |
| Vitamin D2 | Ergocalciferol (Vitamin D2) | 20 | suppressed |
| Memantine Hcl Er | Memantine Hcl | 19 | suppressed |
| Humalog Kwikpen U-100 | Insulin Lispro | 18 | suppressed |
| Alfuzosin Hcl Er | Alfuzosin Hcl | 17 | suppressed |
| Diclofenac Sodium | Diclofenac Sodium | 17 | suppressed |
| Progesterone | Progesterone, Micronized | 17 | suppressed |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 17 | suppressed |
| Valacyclovir | Valacyclovir Hcl | 17 | suppressed |
| Bumetanide | Bumetanide | 16 | suppressed |
| Cefuroxime | Cefuroxime Axetil | 16 | suppressed |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 16 | suppressed |
| Lansoprazole | Lansoprazole | 16 | suppressed |
| Levetiracetam | Levetiracetam | 16 | suppressed |
| Liothyronine Sodium | Liothyronine Sodium | 16 | suppressed |
| Buspirone Hcl | Buspirone Hcl | 15 | suppressed |
| Doxazosin Mesylate | Doxazosin Mesylate | 15 | suppressed |
| Lamotrigine | Lamotrigine | 15 | suppressed |
| Novolog Flexpen | Insulin Aspart | 15 | suppressed |
| Oxycodone Hcl | Oxycodone Hcl | 15 | suppressed |
| Diltiazem 24hr Er (Cd) | Diltiazem Hcl | 14 | suppressed |
| Eszopiclone | Eszopiclone | 14 | suppressed |
| Potassium Citrate Er | Potassium Citrate | 14 | suppressed |
| Aripiprazole | Aripiprazole | 13 | suppressed |
| Basaglar Kwikpen U-100 | Insulin Glargine,hum.Rec.Anlog | 13 | suppressed |
| Diltiazem 24hr Er | Diltiazem Hcl | 13 | suppressed |
| Fluconazole | Fluconazole | 13 | 11 |
| Fluticasone-Salmeterol | Fluticasone Propion/Salmeterol | 13 | suppressed |
| Janumet | Sitagliptin Phos/Metformin Hcl | 13 | suppressed |
| Sumatriptan Succinate | Sumatriptan Succinate | 13 | suppressed |
| Vilazodone Hcl | Vilazodone Hcl | 13 | suppressed |
| Adderall | Dextroamphetamine/Amphetamine | 12 | suppressed |
| Atenolol | Atenolol | 12 | suppressed |
| Carbidopa-Levodopa | Carbidopa/Levodopa | 12 | suppressed |
| Digoxin | Digoxin | 12 | suppressed |
| Januvia | Sitagliptin Phosphate | 12 | suppressed |
| Wixela Inhub | Fluticasone Propion/Salmeterol | 12 | suppressed |
| Diazepam | Diazepam | 11 | suppressed |
| Flecainide Acetate | Flecainide Acetate | 11 | suppressed |
| Ibuprofen | Ibuprofen | 11 | suppressed |
| Ondansetron Odt | Ondansetron | 11 | suppressed |
| Oxcarbazepine | Oxcarbazepine | 11 | suppressed |
| Verapamil Er | Verapamil Hcl | 11 | suppressed |
Timeline
Payment and prescribing data by year
Open Payments and Medicare Part D may refer to different years. They are shown separately rather than aligned as if they describe the same period.
| Year | General Payments | Main payer | Explicit products | Company overlaps | Part D coverage |
|---|---|---|---|---|---|
| 2025 | $561.65 · 29 records | PFIZER INC. | AREXVY, ELIQUIS, EVENITY, LEQVIO, MOUNJARO, NURTEC ODT, Ozempic, PROLIA, QULIPTA, SHINGRIX, SPRAVATO, SYNTHROID, Tlando, UBRELVY, ZAVZPRET | 9 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- What role, if any, does Eliquis play in your treatment recommendations for me?
- How do you evaluate evidence when you have a financial relationship with ABBVIE INC.?
- Are there reasonable alternatives I should understand when we discuss treatment options?
- How should I interpret the industry-payment records shown here in the context of my care?
These are general questions generated from reviewed templates. They are not personalized medical advice.
Sources and limitations
How to read this page
- Payment and Medicare prescribing data can cover different years; every comparison shows both years explicitly.
- Part D does not represent a doctor’s entire practice; it excludes many patients and is subject to CMS public-release thresholds.
- Company–drug relationships must have an auditable source, a precise relationship type, and a valid evidence period. Unresolved mappings are not published.
- Generic drug claims are not attributed to a specific manufacturer without manufacturer-level evidence.
- When a source extract is incomplete, missing rows are never treated as proof of no payments or no prescriptions.
Loaded source releases
| Dataset | Year | Publication | Source |
|---|---|---|---|
| CMS Open Payments — General Payments | 2025 | 2026-06-30 | Original source |
| Medicare Part D Prescribers by Provider and Drug | 2024 | 2026-05-06 | Original source |
| NPPES Data Dissemination V2 | current / reference data | 2026-08-10 | Original source |
Full methodology · Questions & answers · Report a possible error