Healthcare provider profile · identity verified

Mark Warnholz Williams, MD

Family Practice · REDMOND, OR · NPI 1942564281

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	597	166
Lisinopril	Lisinopril	347	96
Levothyroxine Sodium	Levothyroxine Sodium	344	95
Metoprolol Succinate	Metoprolol Succinate	308	82
Losartan Potassium	Losartan Potassium	286	87
Amlodipine Besylate	Amlodipine Besylate	239	79
Omeprazole	Omeprazole	237	77
Tamsulosin Hcl	Tamsulosin Hcl	211	61
Gabapentin	Gabapentin	208	62
Pantoprazole Sodium	Pantoprazole Sodium	186	63
Rosuvastatin Calcium	Rosuvastatin Calcium	160	43
Trazodone Hcl	Trazodone Hcl	160	49
Metformin Hcl	Metformin Hcl	156	47
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	141	37
Hydrochlorothiazide	Hydrochlorothiazide	140	44
Simvastatin	Simvastatin	125	31
Albuterol Sulfate Hfa	Albuterol Sulfate	120	41
Escitalopram Oxalate	Escitalopram Oxalate	113	32
Bupropion Xl	Bupropion Hcl	99	27
Eliquis	Apixaban	97	31
Furosemide	Furosemide	97	33
Diclofenac Sodium	Diclofenac Sodium	95	35
Allopurinol	Allopurinol	89	25
Duloxetine Hcl	Duloxetine Hcl	88	25
Spironolactone	Spironolactone	88	20
Alendronate Sodium	Alendronate Sodium	86	22
Potassium Chloride	Potassium Chloride	79	25
Carvedilol	Carvedilol	76	20
Lovastatin	Lovastatin	73	20
Oxycodone Hcl	Oxycodone Hcl	72	14
Finasteride	Finasteride	71	16
Metformin Hcl Er	Metformin Hcl	71	24
Sertraline Hcl	Sertraline Hcl	69	20
Tramadol Hcl	Tramadol Hcl	69	23
Atenolol	Atenolol	68	19
Fluoxetine Hcl	Fluoxetine Hcl	65	18
Clopidogrel	Clopidogrel Bisulfate	56	15
Ezetimibe	Ezetimibe	54	13
Clonazepam	Clonazepam	53	12
Metoprolol Tartrate	Metoprolol Tartrate	53	15
Montelukast Sodium	Montelukast Sodium	52	23
Pravastatin Sodium	Pravastatin Sodium	52	18
Glipizide Er	Glipizide	51	17
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	51	suppressed
Jardiance	Empagliflozin	50	19
Zolpidem Tartrate	Zolpidem Tartrate	50	12
Citalopram Hbr	Citalopram Hydrobromide	49	11
Estradiol	Estradiol	49	14
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	49	16
Chlorthalidone	Chlorthalidone	47	16
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	47	suppressed
Prednisone	Prednisone	47	36
Lorazepam	Lorazepam	46	11
Ozempic	Semaglutide	46	11
Valsartan	Valsartan	46	16
Famotidine	Famotidine	42	12
Xarelto	Rivaroxaban	42	suppressed
Cephalexin	Cephalexin	41	27
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	40	11
Risperidone	Risperidone	39	suppressed
Tizanidine Hcl	Tizanidine Hcl	38	13
Trulicity	Dulaglutide	38	suppressed
Synthroid	Levothyroxine Sodium	36	suppressed
Telmisartan	Telmisartan	36	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	35	15
Mirtazapine	Mirtazapine	35	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	35	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	35	suppressed
Alprazolam	Alprazolam	33	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	33	suppressed
Breyna	Budesonide/Formoterol Fumarate	32	suppressed
Torsemide	Torsemide	31	suppressed
Ondansetron Odt	Ondansetron	29	18
Paroxetine Hcl	Paroxetine Hcl	29	suppressed
Budesonide-Formoterol Fumarate	Budesonide/Formoterol Fumarate	26	suppressed
Donepezil Hcl	Donepezil Hcl	25	suppressed
Hydrocortisone	Hydrocortisone	25	20
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	25	suppressed
Alfuzosin Hcl Er	Alfuzosin Hcl	24	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	24	22
Fluticasone Propionate	Fluticasone Propionate	24	suppressed
Propranolol Hcl	Propranolol Hcl	23	suppressed
Ropinirole Hcl	Ropinirole Hcl	23	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	22	18
Lamotrigine	Lamotrigine	22	suppressed
Methocarbamol	Methocarbamol	22	17
Breo Ellipta	Fluticasone/Vilanterol	21	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	21	suppressed
Acyclovir	Acyclovir	20	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	20	suppressed
Ketoconazole	Ketoconazole	20	suppressed
Meloxicam	Meloxicam	20	suppressed
Myrbetriq	Mirabegron	20	suppressed
Pregabalin	Pregabalin	20	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	19	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	19	suppressed
Darifenacin Er	Darifenacin Hydrobromide	18	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	18	suppressed
Lidocaine	Lidocaine	18	suppressed
Solifenacin Succinate	Solifenacin Succinate	18	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	17	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	17	13
Bupropion Hcl Sr	Bupropion Hcl	16	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	16	suppressed
Eszopiclone	Eszopiclone	16	suppressed
Ibuprofen	Ibuprofen	16	suppressed
Latanoprost	Latanoprost	16	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	16	suppressed
Testosterone Cypionate	Testosterone Cypionate	16	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	16	suppressed
Azithromycin	Azithromycin	15	15
Colchicine	Colchicine	15	suppressed
Ipratropium Bromide	Ipratropium Bromide	15	suppressed
Morphine Sulfate Er	Morphine Sulfate	15	suppressed
Prazosin Hcl	Prazosin Hcl	15	suppressed
Promethazine Hcl	Promethazine Hcl	15	suppressed
Rizatriptan	Rizatriptan Benzoate	15	suppressed
Topiramate	Topiramate	15	suppressed
Valacyclovir	Valacyclovir Hcl	15	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	14	suppressed
Primidone	Primidone	14	suppressed
Diazepam	Diazepam	13	suppressed
Irbesartan	Irbesartan	13	suppressed
Midodrine Hcl	Midodrine Hcl	13	suppressed
Ondansetron Hcl	Ondansetron Hcl	13	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	13	13
Sumatriptan Succinate	Sumatriptan Succinate	13	suppressed
Buspirone Hcl	Buspirone Hcl	12	suppressed
Divalproex Sodium Er	Divalproex Sodium	12	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	12	suppressed
Insulin Aspart Flexpen	Insulin Aspart	12	suppressed
Nystatin	Nystatin	12	suppressed
Clonidine Hcl	Clonidine Hcl	11	suppressed
Estradiol (Once Weekly)	Estradiol	11	suppressed
Novolog Flexpen	Insulin Aspart	11	suppressed
Tiadylt Er	Diltiazem Hcl	11	suppressed
Tolterodine Tartrate	Tolterodine Tartrate	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

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