Healthcare provider profile · identity verified

Mark P Ewens, M.D.

Family Practice · DAVIS, CA · NPI 1689602773

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	453	120
Losartan Potassium	Losartan Potassium	360	96
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	304	70
Lisinopril	Lisinopril	289	85
Levothyroxine Sodium	Levothyroxine Sodium	263	70
Omeprazole	Omeprazole	252	78
Amlodipine Besylate	Amlodipine Besylate	219	57
Simvastatin	Simvastatin	204	52
Metformin Hcl	Metformin Hcl	156	45
Gabapentin	Gabapentin	154	46
Hydrochlorothiazide	Hydrochlorothiazide	154	40
Metoprolol Succinate	Metoprolol Succinate	141	37
Atenolol	Atenolol	118	30
Trazodone Hcl	Trazodone Hcl	112	30
Albuterol Sulfate Hfa	Albuterol Sulfate	107	31
Benazepril Hcl	Benazepril Hcl	104	27
Famotidine	Famotidine	104	23
Lovastatin	Lovastatin	101	27
Pravastatin Sodium	Pravastatin Sodium	97	23
Tamsulosin Hcl	Tamsulosin Hcl	96	28
Tramadol Hcl	Tramadol Hcl	93	19
Allopurinol	Allopurinol	90	26
Zolpidem Tartrate	Zolpidem Tartrate	86	26
Lorazepam	Lorazepam	82	22
Fluticasone Propionate	Fluticasone Propionate	74	25
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	70	19
Eliquis	Apixaban	69	16
Diazepam	Diazepam	68	14
Pantoprazole Sodium	Pantoprazole Sodium	67	17
Citalopram Hbr	Citalopram Hydrobromide	63	14
Diclofenac Sodium	Diclofenac Sodium	62	13
Furosemide	Furosemide	60	19
Fluoxetine Hcl	Fluoxetine Hcl	57	13
Spironolactone	Spironolactone	57	16
Bupropion Xl	Bupropion Hcl	56	16
Meloxicam	Meloxicam	55	18
Xarelto	Rivaroxaban	54	13
Finasteride	Finasteride	51	16
Oxycodone Hcl	Oxycodone Hcl	51	suppressed
Clonazepam	Clonazepam	50	suppressed
Metoprolol Tartrate	Metoprolol Tartrate	49	12
Sumatriptan Succinate	Sumatriptan Succinate	48	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	47	20
Alendronate Sodium	Alendronate Sodium	46	15
Doxazosin Mesylate	Doxazosin Mesylate	46	suppressed
Clopidogrel	Clopidogrel Bisulfate	45	suppressed
Glipizide Er	Glipizide	44	11
Escitalopram Oxalate	Escitalopram Oxalate	43	16
Triamcinolone Acetonide	Triamcinolone Acetonide	43	20
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	41	13
Duloxetine Hcl	Duloxetine Hcl	40	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	39	suppressed
Donepezil Hcl	Donepezil Hcl	37	suppressed
Alprazolam	Alprazolam	36	14
Ibuprofen	Ibuprofen	36	13
Venlafaxine Hcl Er	Venlafaxine Hcl	36	suppressed
Metformin Hcl Er	Metformin Hcl	35	suppressed
Montelukast Sodium	Montelukast Sodium	34	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	34	suppressed
Celecoxib	Celecoxib	33	suppressed
Sertraline Hcl	Sertraline Hcl	33	suppressed
Azithromycin	Azithromycin	30	27
Buspirone Hcl	Buspirone Hcl	30	suppressed
Glimepiride	Glimepiride	28	11
Rosuvastatin Calcium	Rosuvastatin Calcium	28	suppressed
Acyclovir	Acyclovir	27	suppressed
Lactulose	Lactulose	27	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	27	27
Clonidine Hcl	Clonidine Hcl	26	suppressed
Ondansetron Hcl	Ondansetron Hcl	26	suppressed
Valsartan	Valsartan	26	suppressed
Ozempic	Semaglutide	25	suppressed
Paroxetine Hcl	Paroxetine Hcl	25	suppressed
Temazepam	Temazepam	25	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	25	suppressed
Carvedilol	Carvedilol	24	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	24	suppressed
Ropinirole Hcl	Ropinirole Hcl	24	suppressed
Doxepin Hcl	Doxepin Hcl	23	suppressed
Glipizide	Glipizide	23	suppressed
Diltiazem 24hr Er	Diltiazem Hcl	22	suppressed
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	22	suppressed
Breo Ellipta	Fluticasone/Vilanterol	21	suppressed
Gemfibrozil	Gemfibrozil	20	suppressed
Mirtazapine	Mirtazapine	20	suppressed
Ondansetron Odt	Ondansetron	20	suppressed
Chlorthalidone	Chlorthalidone	19	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	19	14
Potassium Chloride	Potassium Chloride	19	suppressed
Verapamil Er	Verapamil Hcl	19	suppressed
Baclofen	Baclofen	18	suppressed
Meclizine Hcl	Meclizine Hcl	18	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	18	suppressed
Rabeprazole Sodium	Rabeprazole Sodium	18	suppressed
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	17	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	17	15
Estradiol	Estradiol	17	suppressed
Carisoprodol	Carisoprodol	16	suppressed
Pregabalin	Pregabalin	16	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	16	suppressed
Zolpidem Tartrate Er	Zolpidem Tartrate	16	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	15	11
Cephalexin	Cephalexin	15	12
Digoxin	Digoxin	15	suppressed
Ipratropium Bromide	Ipratropium Bromide	15	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	15	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	15	12
Synthroid	Levothyroxine Sodium	15	suppressed
Valacyclovir	Valacyclovir Hcl	15	suppressed
Bupropion Hcl Sr	Bupropion Hcl	14	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	14	suppressed
Naproxen	Naproxen	14	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	13	suppressed
Arnuity Ellipta	Fluticasone Furoate	13	suppressed
Ezetimibe	Ezetimibe	13	suppressed
Hydralazine Hcl	Hydralazine Hcl	13	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	13	suppressed
Testosterone Cypionate	Testosterone Cypionate	13	suppressed
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	12	suppressed
Diltiazem Hcl	Diltiazem Hcl	12	suppressed
Fenofibrate	Fenofibrate	12	suppressed
Lansoprazole	Lansoprazole	12	suppressed
Nabumetone	Nabumetone	12	suppressed
Nitroglycerin	Nitroglycerin	12	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	12	suppressed
Premarin	Estrogens, Conjugated	12	suppressed
Trulicity	Dulaglutide	12	suppressed
Amoxicillin	Amoxicillin	11	suppressed
Benazepril-Hydrochlorothiazide	Benazepril/Hydrochlorothiazide	11	suppressed
Morphine Sulfate Er	Morphine Sulfate	11	suppressed
Propranolol Hcl Er	Propranolol 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	—	—	—	—	—
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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