Payment overview · 2025
General Payments
$28.37
2 reported records · 2 companies
Healthcare provider profile · identity verified
Tammy Williams, NP-C
Physician Assistants & Advanced Practice Nursing Providers|Nurse Practitioner|Adult Health · MADISON, FL · NPI 1437282415
Verified facts
What the public records show
CMS Open Payments records show Tammy Williams, NP-C received $28.37 in general payments during 2025 across 2 reported records.
Dexcom, Inc. accounted for 56.8% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 2 associated products.
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 |
|---|---|---|---|---|---|
| Dexcom, Inc. | Unresolved — no canonical attribution shown | $16.10 | 56.8% | 1 | 2025 |
| Phathom Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $12.27 | 43.2% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $28.37 | 2 |
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 |
|---|---|---|---|---|---|
| Dexcom G6 Transmitter Normalized: dexcom g6 transmitter |
Medical Supply | Dexcom, Inc. | $16.10 | 1 | 2025 |
Source payment records
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| VOQUEZNA Normalized: voquezna |
Drug | Phathom Pharmaceuticals, Inc. | $12.27 | 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
No exact normalized or approved-alias overlap was found in the loaded Part D year. This does not mean the doctor never prescribed the product.
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.
No publishable same-company prescribing overlap was found in the loaded Part D year. This does not mean the doctor never prescribed a drug reported elsewhere by a paying company.
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 |
|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 776 | 240 |
| Amlodipine Besylate | Amlodipine Besylate | 510 | 166 |
| Levothyroxine Sodium | Levothyroxine Sodium | 500 | 152 |
| Losartan Potassium | Losartan Potassium | 404 | 125 |
| Lisinopril | Lisinopril | 329 | 111 |
| Hydrochlorothiazide | Hydrochlorothiazide | 320 | 103 |
| Pantoprazole Sodium | Pantoprazole Sodium | 267 | 95 |
| Simvastatin | Simvastatin | 244 | 80 |
| Omeprazole | Omeprazole | 233 | 83 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 211 | 81 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 203 | 71 |
| Gabapentin | Gabapentin | 189 | 76 |
| Carvedilol | Carvedilol | 181 | 61 |
| Furosemide | Furosemide | 179 | 61 |
| Escitalopram Oxalate | Escitalopram Oxalate | 174 | 47 |
| Fluticasone Propionate | Fluticasone Propionate | 152 | 63 |
| Metoprolol Succinate | Metoprolol Succinate | 151 | 51 |
| Pioglitazone Hcl | Pioglitazone Hcl | 148 | 51 |
| Metformin Hcl | Metformin Hcl | 145 | 45 |
| Potassium Chloride | Potassium Chloride | 140 | 49 |
| Jardiance | Empagliflozin | 132 | 44 |
| Sertraline Hcl | Sertraline Hcl | 128 | 38 |
| Metoprolol Tartrate | Metoprolol Tartrate | 127 | 42 |
| Allopurinol | Allopurinol | 126 | 40 |
| Famotidine | Famotidine | 126 | 40 |
| Trazodone Hcl | Trazodone Hcl | 119 | 42 |
| Ezetimibe | Ezetimibe | 115 | 38 |
| Farxiga | Dapagliflozin Propanediol | 115 | 30 |
| Glimepiride | Glimepiride | 97 | 35 |
| Montelukast Sodium | Montelukast Sodium | 97 | 30 |
| Alprazolam | Alprazolam | 94 | 35 |
| Alendronate Sodium | Alendronate Sodium | 93 | 31 |
| Ozempic | Semaglutide | 93 | 25 |
| Duloxetine Hcl | Duloxetine Hcl | 87 | 26 |
| Trelegy Ellipta | Fluticasone/Umeclidin/Vilanter | 85 | 22 |
| Tamsulosin Hcl | Tamsulosin Hcl | 83 | 34 |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 77 | 25 |
| Prednisone | Prednisone | 75 | 61 |
| Meloxicam | Meloxicam | 74 | 32 |
| Clopidogrel | Clopidogrel Bisulfate | 73 | 27 |
| Donepezil Hcl | Donepezil Hcl | 72 | 21 |
| Tizanidine Hcl | Tizanidine Hcl | 70 | 21 |
| Levocetirizine Dihydrochloride | Levocetirizine Dihydrochloride | 65 | 25 |
| Meclizine Hcl | Meclizine Hcl | 65 | 27 |
| Azithromycin | Azithromycin | 64 | 57 |
| Bupropion Xl | Bupropion Hcl | 64 | 18 |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 63 | 16 |
| Eliquis | Apixaban | 63 | 23 |
| Finasteride | Finasteride | 63 | 26 |
| Vitamin D2 | Ergocalciferol (Vitamin D2) | 60 | 25 |
| Pravastatin Sodium | Pravastatin Sodium | 59 | 25 |
| Clotrimazole-Betamethasone | Clotrimazole/Betamethasone Dip | 57 | 24 |
| Amlodipine Besylate-Benazepril | Amlodipine Besylate/Benazepril | 56 | 14 |
| Lantus Solostar | Insulin Glargine,hum.Rec.Anlog | 56 | 17 |
| Mounjaro | Tirzepatide | 55 | 11 |
| Valsartan | Valsartan | 55 | 17 |
| Januvia | Sitagliptin Phosphate | 53 | 11 |
| Tramadol Hcl | Tramadol Hcl | 53 | 19 |
| Benazepril Hcl | Benazepril Hcl | 52 | 17 |
| Ibuprofen | Ibuprofen | 52 | 21 |
| Nitrofurantoin Mono-Macro | Nitrofurantoin Monohyd/M-Cryst | 47 | 41 |
| Citalopram Hbr | Citalopram Hydrobromide | 46 | 14 |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 46 | 15 |
| Oxybutynin Chloride | Oxybutynin Chloride | 45 | 16 |
| Triamterene-Hydrochlorothiazid | Triamterene/Hydrochlorothiazid | 40 | suppressed |
| Hydralazine Hcl | Hydralazine Hcl | 39 | 14 |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 37 | 33 |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 36 | suppressed |
| Synthroid | Levothyroxine Sodium | 36 | 14 |
| Anoro Ellipta | Umeclidinium Brm/Vilanterol Tr | 35 | suppressed |
| Spironolactone | Spironolactone | 34 | 13 |
| Atenolol | Atenolol | 33 | 11 |
| Glipizide | Glipizide | 33 | suppressed |
| Lorazepam | Lorazepam | 33 | 11 |
| Warfarin Sodium | Warfarin Sodium | 32 | suppressed |
| Glipizide Er | Glipizide | 31 | suppressed |
| Celecoxib | Celecoxib | 28 | suppressed |
| Dicyclomine Hcl | Dicyclomine Hcl | 28 | 12 |
| Trulicity | Dulaglutide | 28 | suppressed |
| Doxycycline Hyclate | Doxycycline Hyclate | 27 | 23 |
| Lovastatin | Lovastatin | 27 | suppressed |
| Sucralfate | Sucralfate | 27 | 13 |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 27 | 14 |
| Fenofibrate | Fenofibrate,micronized | 26 | suppressed |
| Ropinirole Hcl | Ropinirole Hcl | 26 | suppressed |
| Levetiracetam | Levetiracetam | 25 | suppressed |
| Metformin Hcl Er | Metformin Hcl | 25 | suppressed |
| Telmisartan | Telmisartan | 25 | suppressed |
| Fenofibrate | Fenofibrate | 24 | suppressed |
| Fenofibrate | Fenofibrate Nanocrystallized | 24 | suppressed |
| Folic Acid | Folic Acid | 24 | 11 |
| Gemfibrozil | Gemfibrozil | 24 | suppressed |
| Temazepam | Temazepam | 24 | suppressed |
| Klor-Con 10 | Potassium Chloride | 23 | suppressed |
| Myrbetriq | Mirabegron | 23 | suppressed |
| Pregabalin | Pregabalin | 23 | suppressed |
| Quetiapine Fumarate | Quetiapine Fumarate | 23 | suppressed |
| Dutasteride | Dutasteride | 22 | suppressed |
| Nystatin | Nystatin | 22 | suppressed |
| Oxybutynin Chloride Er | Oxybutynin Chloride | 22 | suppressed |
| Baclofen | Baclofen | 20 | suppressed |
| Fluoxetine Hcl | Fluoxetine Hcl | 20 | suppressed |
| Estradiol | Estradiol | 19 | suppressed |
| Hydroxyzine Pamoate | Hydroxyzine Pamoate | 19 | suppressed |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 19 | suppressed |
| Fluconazole | Fluconazole | 18 | 15 |
| Memantine Hcl | Memantine Hcl | 18 | suppressed |
| Toujeo Solostar | Insulin Glargine,hum.Rec.Anlog | 18 | suppressed |
| Vraylar | Cariprazine Hcl | 18 | suppressed |
| Clonazepam | Clonazepam | 17 | suppressed |
| Rybelsus | Semaglutide | 17 | suppressed |
| Ultra-Fine Mini Pen Needle | Pen Needle, Diabetic | 17 | suppressed |
| Ventolin Hfa | Albuterol Sulfate | 17 | suppressed |
| Enalapril Maleate | Enalapril Maleate | 16 | suppressed |
| Isosorbide Mononitrate Er | Isosorbide Mononitrate | 16 | suppressed |
| Propranolol Hcl Er | Propranolol Hcl | 16 | suppressed |
| Valsartan-Hydrochlorothiazide | Valsartan/Hydrochlorothiazide | 16 | suppressed |
| Breztri Aerosphere | Budesonide/Glycopyr/Formoterol | 15 | suppressed |
| Bumetanide | Bumetanide | 15 | suppressed |
| Colchicine | Colchicine | 15 | suppressed |
| Lamotrigine | Lamotrigine | 15 | suppressed |
| Lansoprazole | Lansoprazole | 15 | suppressed |
| Nifedipine Er | Nifedipine | 15 | suppressed |
| Valacyclovir | Valacyclovir Hcl | 15 | suppressed |
| Amitriptyline Hcl | Amitriptyline Hcl | 14 | suppressed |
| Clonidine Hcl | Clonidine Hcl | 14 | suppressed |
| Cyanocobalamin Injection | Cyanocobalamin (Vitamin B-12) | 14 | suppressed |
| Hydroxyzine Hcl | Hydroxyzine Hcl | 14 | suppressed |
| Methylprednisolone | Methylprednisolone | 14 | 14 |
| Mirtazapine | Mirtazapine | 14 | suppressed |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 13 | 13 |
| Methocarbamol | Methocarbamol | 13 | suppressed |
| Ondansetron Hcl | Ondansetron Hcl | 13 | suppressed |
| Paroxetine Hcl | Paroxetine Hcl | 13 | suppressed |
| Sumatriptan Succinate | Sumatriptan Succinate | 13 | suppressed |
| Chlorthalidone | Chlorthalidone | 12 | suppressed |
| Doxazosin Mesylate | Doxazosin Mesylate | 12 | suppressed |
| Humalog Kwikpen U-100 | Insulin Lispro | 12 | suppressed |
| Omega-3 Acid Ethyl Esters | Omega-3 Acid Ethyl Esters | 12 | suppressed |
| Ranolazine Er | Ranolazine | 12 | suppressed |
| Sulfamethoxazole-Trimethoprim | Sulfamethoxazole/Trimethoprim | 12 | suppressed |
| Azelastine Hcl | Azelastine Hcl | 11 | suppressed |
| Megestrol Acetate | Megestrol Acetate | 11 | suppressed |
| Naproxen | Naproxen | 11 | suppressed |
| Propranolol Hcl | Propranolol Hcl | 11 | suppressed |
| Ramipril | Ramipril | 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 | $28.37 · 2 records | Dexcom, Inc. | Dexcom G6 Transmitter, VOQUEZNA | — | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- 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