Healthcare provider profile · identity verified

Marc H Oster, MD

Internal Medicine · CABOT, PA · NPI 1508813809

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
Eliquis	Apixaban	547	58
Levothyroxine Sodium	Levothyroxine Sodium	480	53
Omeprazole	Omeprazole	412	78
Sertraline Hcl	Sertraline Hcl	392	59
Furosemide	Furosemide	355	68
Atorvastatin Calcium	Atorvastatin Calcium	307	60
Amlodipine Besylate	Amlodipine Besylate	284	49
Potassium Chloride	Potassium Chloride	261	46
Metoprolol Succinate	Metoprolol Succinate	238	46
Tamsulosin Hcl	Tamsulosin Hcl	235	40
Metformin Hcl	Metformin Hcl	224	26
Clopidogrel	Clopidogrel Bisulfate	189	33
Tramadol Hcl	Tramadol Hcl	188	25
Risperidone	Risperidone	161	20
Mirtazapine	Mirtazapine	160	23
Pantoprazole Sodium	Pantoprazole Sodium	157	20
Gabapentin	Gabapentin	155	31
Metoprolol Tartrate	Metoprolol Tartrate	154	36
Donepezil Hcl	Donepezil Hcl	135	22
Oxycodone Hcl	Oxycodone Hcl	119	23
Warfarin Sodium	Warfarin Sodium	118	suppressed
Lisinopril	Lisinopril	114	24
Rosuvastatin Calcium	Rosuvastatin Calcium	106	17
Spironolactone	Spironolactone	106	18
Lorazepam	Lorazepam	100	28
Escitalopram Oxalate	Escitalopram Oxalate	95	16
Glipizide	Glipizide	95	14
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	94	13
Midodrine Hcl	Midodrine Hcl	93	16
Allopurinol	Allopurinol	92	suppressed
Xarelto	Rivaroxaban	89	17
Losartan Potassium	Losartan Potassium	84	18
Pravastatin Sodium	Pravastatin Sodium	82	14
Carvedilol	Carvedilol	75	15
Ondansetron Hcl	Ondansetron Hcl	73	28
Simvastatin	Simvastatin	71	14
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	68	15
Famotidine	Famotidine	66	11
Triamcinolone Acetonide	Triamcinolone Acetonide	66	26
Bumetanide	Bumetanide	65	19
Nitroglycerin	Nitroglycerin	63	suppressed
Trazodone Hcl	Trazodone Hcl	63	suppressed
Fluticasone Propionate	Fluticasone Propionate	61	20
Breo Ellipta	Fluticasone/Vilanterol	56	suppressed
Latanoprost	Latanoprost	54	12
Myrbetriq	Mirabegron	54	suppressed
Amiodarone Hcl	Amiodarone Hcl	53	17
Sotalol	Sotalol Hcl	48	suppressed
Loperamide	Loperamide Hcl	46	14
Finasteride	Finasteride	45	suppressed
Baclofen	Baclofen	44	suppressed
Cephalexin	Cephalexin	43	23
Digoxin	Digoxin	43	suppressed
Januvia	Sitagliptin Phosphate	42	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	41	suppressed
Retacrit	Epoetin Alfa-Epbx	41	suppressed
Budesonide Dr	Budesonide	40	suppressed
Jardiance	Empagliflozin	40	suppressed
Pregabalin	Pregabalin	40	suppressed
Buspirone Hcl	Buspirone Hcl	39	suppressed
Olanzapine	Olanzapine	39	suppressed
Glimepiride	Glimepiride	38	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	37	suppressed
Levetiracetam	Levetiracetam	37	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	37	suppressed
Alendronate Sodium	Alendronate Sodium	36	suppressed
Entresto	Sacubitril/Valsartan	36	suppressed
Albuterol Sulfate	Albuterol Sulfate	35	suppressed
Prednisone	Prednisone	35	13
Valsartan	Valsartan	35	suppressed
Cholestyramine Light	Cholestyramine	34	suppressed
Diltiazem 24hr Er	Diltiazem Hcl	34	suppressed
Rivastigmine	Rivastigmine	33	suppressed
Hydrochlorothiazide	Hydrochlorothiazide	32	suppressed
Autoshield Duo Pen Needle	Pen Needle,dual Safety,diabetc	31	suppressed
Hydralazine Hcl	Hydralazine Hcl	31	suppressed
Ropinirole Hcl	Ropinirole Hcl	31	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	31	14
Atenolol	Atenolol	30	suppressed
Citalopram Hbr	Citalopram Hydrobromide	30	suppressed
Memantine Hcl	Memantine Hcl	30	suppressed
Albuterol Sulfate Hfa	Albuterol Sulfate	29	15
Dutasteride	Dutasteride	29	suppressed
Nystatin	Nystatin	29	11
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	29	suppressed
Clonazepam	Clonazepam	28	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	28	suppressed
Sucralfate	Sucralfate	28	suppressed
Veltassa	Patiromer Calcium Sorbitex	28	suppressed
Diclofenac Sodium	Diclofenac Sodium	27	12
Aripiprazole	Aripiprazole	26	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	26	suppressed
Rytary	Carbidopa/Levodopa	26	suppressed
Bupropion Xl	Bupropion Hcl	25	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	25	suppressed
Novofine Autocover	Pen Needle, Diabetic, Safety	25	suppressed
Celecoxib	Celecoxib	24	suppressed
Estradiol	Estradiol	24	suppressed
Ezetimibe	Ezetimibe	24	suppressed
Lamotrigine	Lamotrigine	24	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	24	suppressed
Bethanechol Chloride	Bethanechol Chloride	23	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	23	16
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	23	suppressed
Clonidine Hcl	Clonidine Hcl	22	suppressed
Ondansetron Odt	Ondansetron	22	suppressed
Montelukast Sodium	Montelukast Sodium	21	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	21	suppressed
Incruse Ellipta	Umeclidinium Bromide	20	suppressed
Metoclopramide Hcl	Metoclopramide Hcl	20	suppressed
Bisoprolol Fumarate	Bisoprolol Fumarate	19	suppressed
Clotrimazole	Clotrimazole	18	suppressed
Divalproex Sodium	Divalproex Sodium	18	suppressed
Ivermectin	Ivermectin	18	suppressed
Methimazole	Methimazole	18	suppressed
Morphine Sulfate	Morphine Sulfate	18	suppressed
Paroxetine Hcl	Paroxetine Hcl	18	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	18	suppressed
Calcium Acetate	Calcium Acetate	17	suppressed
Fluconazole	Fluconazole	17	suppressed
Humalog Kwikpen U-100	Insulin Lispro	17	suppressed
Levofloxacin	Levofloxacin	17	13
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	17	suppressed
Terazosin Hcl	Terazosin Hcl	17	suppressed
Diltiazem 24hr Er (La)	Diltiazem Hcl	16	suppressed
Duloxetine Hcl	Duloxetine Hcl	16	suppressed
Folic Acid	Folic Acid	16	suppressed
Levemir Flexpen	Insulin Detemir	16	suppressed
Mirabegron Er	Mirabegron	16	suppressed
Mupirocin	Mupirocin	16	15
Venlafaxine Hcl Er	Venlafaxine Hcl	16	suppressed
Cefuroxime	Cefuroxime Axetil	15	13
Methenamine Hippurate	Methenamine Hippurate	15	suppressed
Novolog Flexpen	Insulin Aspart	15	suppressed
Repaglinide	Repaglinide	15	suppressed
Torsemide	Torsemide	15	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	14	suppressed
Dorzolamide-Timolol	Dorzolamide/Timolol/Pf	14	suppressed
Farxiga	Dapagliflozin Propanediol	14	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	14	suppressed
Janumet	Sitagliptin Phos/Metformin Hcl	14	suppressed
Lovastatin	Lovastatin	14	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	14	11
Olanzapine Odt	Olanzapine	14	suppressed
Ranolazine Er	Ranolazine	14	suppressed
Benazepril Hcl	Benazepril Hcl	13	suppressed
Irbesartan-Hydrochlorothiazide	Irbesartan/Hydrochlorothiazide	13	suppressed
Lumigan	Bimatoprost	13	suppressed
Mesalamine	Mesalamine	13	suppressed
Nadolol	Nadolol	13	suppressed
Naproxen	Naproxen	13	suppressed
Tacrolimus	Tacrolimus	13	suppressed
Tradjenta	Linagliptin	13	suppressed
Alogliptin	Alogliptin Benzoate	12	suppressed
Combigan	Brimonidine Tartrate/Timolol	12	suppressed
Glipizide Er	Glipizide	12	suppressed
Ketoconazole	Ketoconazole	12	suppressed
Mycophenolate Mofetil	Mycophenolate Mofetil	12	suppressed
Nifedipine Er	Nifedipine	12	suppressed
Ozempic	Semaglutide	12	suppressed
Verapamil Er	Verapamil Hcl	12	suppressed
Amoxicillin	Amoxicillin	11	suppressed
Isosorbide Mononitrate	Isosorbide Mononitrate	11	suppressed
Methenamine Mandelate	Methenamine Mandelate	11	suppressed
Solifenacin Succinate	Solifenacin Succinate	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