Healthcare provider profile · identity verified

David Bruce Witkin, M.D.

Internal Medicine · EUGENE, OR · NPI 1649289810

Profile state: partd only Open Payments: 2025 Medicare Part D: 2024 Last identity check: 2026-08-10 Page data build: 2026-08-12

Verified facts

What the public records show

We did not find matching Open Payments records for this doctor in 2025.

These records do not establish that a payment influenced prescribing or medical care.

Payment overview · 2025

General Payments

We did not find matching Open Payments records for this doctor in the selected program year.

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.

Analysis 1 · Payment-linked products

Products named in Open Payments records

No payment-linked product analysis is available because no matching General Payment records were found for the selected year.

Public prescribing for products named in payments

There is no explicit payment-product set available for a Part D comparison.

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.

There is no payer-company set available for this comparison.

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	533	170
Lisinopril	Lisinopril	241	82
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	237	45
Tamsulosin Hcl	Tamsulosin Hcl	174	58
Levothyroxine Sodium	Levothyroxine Sodium	169	52
Albuterol Sulfate Hfa	Albuterol Sulfate	167	60
Amlodipine Besylate	Amlodipine Besylate	156	56
Gabapentin	Gabapentin	154	52
Oxycodone Hcl	Oxycodone Hcl	145	23
Trazodone Hcl	Trazodone Hcl	131	47
Losartan Potassium	Losartan Potassium	127	51
Metformin Hcl Er	Metformin Hcl	125	45
Pantoprazole Sodium	Pantoprazole Sodium	114	42
Meloxicam	Meloxicam	99	29
Potassium Chloride	Potassium Chloride	99	34
Metoprolol Succinate	Metoprolol Succinate	96	35
Pradaxa	Dabigatran Etexilate Mesylate	88	34
Metformin Hcl	Metformin Hcl	84	29
Tramadol Hcl	Tramadol Hcl	83	20
Metoprolol Tartrate	Metoprolol Tartrate	78	30
Simvastatin	Simvastatin	78	26
Furosemide	Furosemide	76	31
Duloxetine Hcl	Duloxetine Hcl	71	23
Glipizide	Glipizide	70	24
Rosuvastatin Calcium	Rosuvastatin Calcium	70	20
Hydrochlorothiazide	Hydrochlorothiazide	59	22
Alendronate Sodium	Alendronate Sodium	56	21
Sertraline Hcl	Sertraline Hcl	56	17
Ozempic	Semaglutide	53	suppressed
Carvedilol	Carvedilol	52	14
Pravastatin Sodium	Pravastatin Sodium	51	18
Prednisone	Prednisone	51	33
Morphine Sulfate Er	Morphine Sulfate	50	suppressed
Pregabalin	Pregabalin	50	14
Finasteride	Finasteride	48	14
Buspirone Hcl	Buspirone Hcl	47	11
Escitalopram Oxalate	Escitalopram Oxalate	46	16
Clonazepam	Clonazepam	45	suppressed
Lorazepam	Lorazepam	45	15
Tizanidine Hcl	Tizanidine Hcl	45	suppressed
Allopurinol	Allopurinol	44	14
Wixela Inhub	Fluticasone Propion/Salmeterol	44	19
Eliquis	Apixaban	42	suppressed
Montelukast Sodium	Montelukast Sodium	42	17
Atenolol	Atenolol	41	15
Methocarbamol	Methocarbamol	40	11
Alprazolam	Alprazolam	37	suppressed
Ondansetron Odt	Ondansetron	37	15
Bupropion Xl	Bupropion Hcl	36	13
Jardiance	Empagliflozin	36	13
Valsartan	Valsartan	32	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	31	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	31	12
Omeprazole	Omeprazole	31	suppressed
Famotidine	Famotidine	30	suppressed
Memantine Hcl	Memantine Hcl	29	suppressed
Bupropion Hcl Sr	Bupropion Hcl	28	suppressed
Ropinirole Hcl	Ropinirole Hcl	28	suppressed
Shingrix	Varicella-Zoster Ge/As01b/Pf	28	26
Triamcinolone Acetonide	Triamcinolone Acetonide	28	20
Digoxin	Digoxin	27	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	27	suppressed
Spiriva Respimat	Tiotropium Bromide	27	suppressed
Torsemide	Torsemide	27	suppressed
Xarelto	Rivaroxaban	27	suppressed
Spironolactone	Spironolactone	26	11
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	25	suppressed
Fluticasone Propionate	Fluticasone Propionate	24	suppressed
Terazosin Hcl	Terazosin Hcl	24	suppressed
Methylphenidate Hcl	Methylphenidate Hcl	23	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	23	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	23	suppressed
Clopidogrel	Clopidogrel Bisulfate	22	11
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	22	suppressed
Veo Insulin Syringe	Syringe-Needle,insulin,0.5 Ml	21	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	21	suppressed
Fenofibrate	Fenofibrate	20	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	20	suppressed
Propranolol Hcl	Propranolol Hcl	20	suppressed
Arexvy	Rsvpref3 Antigen/As01e/Pf	19	19
Nystatin	Nystatin	19	12
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	19	suppressed
Fludrocortisone Acetate	Fludrocortisone Acetate	18	suppressed
Hydrocortisone	Hydrocortisone	18	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	18	suppressed
Mirtazapine	Mirtazapine	18	suppressed
Acyclovir	Acyclovir	17	suppressed
Cefadroxil	Cefadroxil	17	14
Ezetimibe	Ezetimibe	17	suppressed
Hydralazine Hcl	Hydralazine Hcl	17	suppressed
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	16	suppressed
Sure Comfort Pen Needle	Pen Needle, Diabetic	16	suppressed
Alvesco	Ciclesonide	15	suppressed
Celecoxib	Celecoxib	15	suppressed
Humulin N Kwikpen	Insulin Nph Human Isophane	15	suppressed
Latanoprost	Latanoprost	15	suppressed
Azithromycin	Azithromycin	14	suppressed
Hydromorphone Hcl	Hydromorphone Hcl	14	suppressed
Rizatriptan	Rizatriptan Benzoate	14	suppressed
Chlorthalidone	Chlorthalidone	13	suppressed
Lovastatin	Lovastatin	13	suppressed
Nitroglycerin	Nitroglycerin	13	11
Ropinirole Er	Ropinirole Hcl	13	suppressed
Tenivac	Tetanus-Diphtheria Toxoids/Pf	13	13
Ultra-Fine Nano Pen Needle	Pen Needle, Diabetic	13	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	12	suppressed
Alprazolam Xr	Alprazolam	12	suppressed
Cartia Xt	Diltiazem Hcl	12	suppressed
Donepezil Hcl	Donepezil Hcl	12	suppressed
Doxycycline Monohydrate	Doxycycline Monohydrate	12	suppressed
Humulin N	Insulin Nph Human Isophane	12	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	12	suppressed
Metronidazole	Metronidazole	12	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	12	suppressed
Warfarin Sodium	Warfarin Sodium	12	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	11	suppressed
Estradiol	Estradiol	11	suppressed
Humulin 70-30	Insulin Nph Hum/Reg Insulin Hm	11	suppressed
Ibuprofen	Ibuprofen	11	suppressed
Lamotrigine	Lamotrigine	11	suppressed
Metolazone	Metolazone	11	suppressed
Mupirocin	Mupirocin	11	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	11	suppressed
Topiramate	Topiramate	11	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	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	—	—	—	—	—
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

Methodology version: 2.1

Editorial template version: 2.4

Product contract version: 2.0

Schema version: 0.7.0

Page data build: 2026-08-12T23:34:59.370714+00:00

Publication policy: eligible for indexing after public-launch controls are enabled

Full methodology · Questions & answers · Report a possible error