Healthcare provider profile · identity verified

Matthew L. Hamar, D.O.

Family Practice · BISMARCK, ND · NPI 1154618130

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
Levothyroxine Sodium	Levothyroxine Sodium	989	142
Atorvastatin Calcium	Atorvastatin Calcium	741	151
Amlodipine Besylate	Amlodipine Besylate	693	138
Rosuvastatin Calcium	Rosuvastatin Calcium	624	168
Losartan Potassium	Losartan Potassium	531	112
Metoprolol Succinate	Metoprolol Succinate	485	90
Sertraline Hcl	Sertraline Hcl	484	80
Lisinopril	Lisinopril	477	118
Omeprazole	Omeprazole	470	108
Metformin Hcl	Metformin Hcl	415	94
Hydrochlorothiazide	Hydrochlorothiazide	407	90
Eliquis	Apixaban	401	59
Pantoprazole Sodium	Pantoprazole Sodium	400	77
Gabapentin	Gabapentin	356	76
Furosemide	Furosemide	340	72
Tamsulosin Hcl	Tamsulosin Hcl	331	74
Simvastatin	Simvastatin	287	74
Pravastatin Sodium	Pravastatin Sodium	279	57
Famotidine	Famotidine	249	58
Allopurinol	Allopurinol	238	57
Potassium Chloride	Potassium Chloride	223	42
Metoprolol Tartrate	Metoprolol Tartrate	205	42
Escitalopram Oxalate	Escitalopram Oxalate	161	34
Montelukast Sodium	Montelukast Sodium	152	39
Trulicity	Dulaglutide	152	23
Spironolactone	Spironolactone	144	27
Jardiance	Empagliflozin	143	29
Carvedilol	Carvedilol	142	33
Trazodone Hcl	Trazodone Hcl	141	34
Glimepiride	Glimepiride	140	31
Celecoxib	Celecoxib	138	19
Mirtazapine	Mirtazapine	133	12
Duloxetine Hcl	Duloxetine Hcl	129	20
Ezetimibe	Ezetimibe	127	28
Lorazepam	Lorazepam	127	30
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	122	36
Metformin Hcl Er	Metformin Hcl	118	31
Ozempic	Semaglutide	116	16
Xarelto	Rivaroxaban	116	17
Alendronate Sodium	Alendronate Sodium	109	27
Zolpidem Tartrate	Zolpidem Tartrate	106	30
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	105	20
Finasteride	Finasteride	104	26
Farxiga	Dapagliflozin Propanediol	103	16
Tramadol Hcl	Tramadol Hcl	100	17
Prednisone	Prednisone	99	30
Fluticasone Propionate	Fluticasone Propionate	98	28
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	93	25
Olmesartan Medoxomil	Olmesartan Medoxomil	90	28
Clopidogrel	Clopidogrel Bisulfate	89	26
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	88	21
Warfarin Sodium	Warfarin Sodium	85	18
Doxazosin Mesylate	Doxazosin Mesylate	83	19
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	81	22
Bupropion Xl	Bupropion Hcl	78	20
Oxybutynin Chloride Er	Oxybutynin Chloride	74	23
Atenolol	Atenolol	73	18
Mounjaro	Tirzepatide	73	11
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	69	17
Alprazolam	Alprazolam	67	18
Synthroid	Levothyroxine Sodium	67	15
Memantine Hcl	Memantine Hcl	57	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	56	13
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	55	12
Glipizide	Glipizide	55	13
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	54	suppressed
Temazepam	Temazepam	53	12
Albuterol Sulfate Hfa	Albuterol Sulfate	51	24
Januvia	Sitagliptin Phosphate	50	suppressed
Meloxicam	Meloxicam	49	11
Novolog Flexpen	Insulin Aspart	49	15
Pioglitazone Hcl	Pioglitazone Hcl	47	suppressed
Citalopram Hbr	Citalopram Hydrobromide	46	11
Donepezil Hcl	Donepezil Hcl	46	13
Carbidopa-Levodopa	Carbidopa/Levodopa	43	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	42	suppressed
Bisoprolol Fumarate	Bisoprolol Fumarate	42	suppressed
Tizanidine Hcl	Tizanidine Hcl	42	suppressed
Clonazepam	Clonazepam	41	suppressed
Raloxifene Hcl	Raloxifene Hcl	41	suppressed
Ropinirole Hcl	Ropinirole Hcl	41	suppressed
Chlorthalidone	Chlorthalidone	38	suppressed
Fentanyl	Fentanyl	38	suppressed
Gemfibrozil	Gemfibrozil	38	suppressed
Pregabalin	Pregabalin	38	suppressed
Amoxicillin	Amoxicillin	35	25
Myrbetriq	Mirabegron	34	suppressed
Terazosin Hcl	Terazosin Hcl	34	suppressed
Ipratropium Bromide	Ipratropium Bromide	33	suppressed
Lactulose	Lactulose	33	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	32	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	31	26
Glipizide Er	Glipizide	31	suppressed
Hydralazine Hcl	Hydralazine Hcl	31	suppressed
Nystatin	Nystatin	30	17
Olmesartan-Hydrochlorothiazide	Olmesartan/Hydrochlorothiazide	30	suppressed
Oxycodone Hcl	Oxycodone Hcl	30	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	30	suppressed
Propranolol Hcl Er	Propranolol Hcl	29	suppressed
Ramipril	Ramipril	29	suppressed
Nifedipine Er	Nifedipine	28	suppressed
Rybelsus	Semaglutide	28	suppressed
Autoshield Duo Pen Needle	Pen Needle,dual Safety,diabetc	27	suppressed
Digoxin	Digoxin	27	suppressed
Tresiba Flextouch U-100	Insulin Degludec	27	suppressed
Bumetanide	Bumetanide	26	suppressed
Glyxambi	Empagliflozin/Linagliptin	26	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	26	suppressed
Midodrine Hcl	Midodrine Hcl	26	suppressed
Ondansetron Hcl	Ondansetron Hcl	26	suppressed
Propranolol Hcl	Propranolol Hcl	26	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	25	suppressed
Fenofibrate	Fenofibrate	25	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	25	suppressed
Klor-Con M20	Potassium Chloride	25	suppressed
Levemir Flexpen	Insulin Detemir	25	suppressed
Linzess	Linaclotide	24	suppressed
Levetiracetam	Levetiracetam	23	suppressed
Repatha Sureclick	Evolocumab	23	suppressed
Humalog Kwikpen U-100	Insulin Lispro	22	suppressed
Klor-Con M10	Potassium Chloride	22	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	22	17
Sevelamer Carbonate	Sevelamer Carbonate	22	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	22	17
Doxycycline Monohydrate	Doxycycline Monohydrate	21	18
Isosorbide Mononitrate Er	Isosorbide Mononitrate	21	suppressed
Paroxetine Hcl	Paroxetine Hcl	21	suppressed
Telmisartan	Telmisartan	21	suppressed
Valacyclovir	Valacyclovir Hcl	21	12
Arnuity Ellipta	Fluticasone Furoate	20	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	20	13
Novofine 32	Pen Needle, Diabetic	20	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	20	suppressed
Topiramate	Topiramate	20	suppressed
Benazepril Hcl	Benazepril Hcl	19	suppressed
Tradjenta	Linagliptin	19	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	18	15
Insulin Aspart Flexpen	Insulin Aspart	18	suppressed
Primidone	Primidone	18	suppressed
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	18	suppressed
Ventolin Hfa	Albuterol Sulfate	18	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	17	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	17	suppressed
Solifenacin Succinate	Solifenacin Succinate	17	suppressed
Methotrexate	Methotrexate Sodium	16	suppressed
Azelastine Hcl	Azelastine Hcl	15	suppressed
Bisoprolol-Hydrochlorothiazide	Bisoprolol/Hydrochlorothiazide	15	suppressed
Ibuprofen	Ibuprofen	15	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	15	suppressed
Megestrol Acetate	Megestrol Acetate	15	suppressed
Ondansetron Odt	Ondansetron	15	suppressed
Soliqua 100-33	Insulin Glargine/Lixisenatide	15	suppressed
Tresiba Flextouch U-200	Insulin Degludec	15	suppressed
Trintellix	Vortioxetine Hydrobromide	15	suppressed
Valsartan	Valsartan	15	suppressed
Colchicine	Colchicine	14	suppressed
Hydrocortisone	Hydrocortisone	14	suppressed
Janumet	Sitagliptin Phos/Metformin Hcl	14	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	14	11
Toujeo Solostar	Insulin Glargine,hum.Rec.Anlog	14	suppressed
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	14	suppressed
Lovastatin	Lovastatin	13	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	13	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	13	suppressed
Symbicort	Budesonide/Formoterol Fumarate	13	suppressed
Ursodiol	Ursodiol	13	suppressed
Benazepril-Hydrochlorothiazide	Benazepril/Hydrochlorothiazide	12	suppressed
Clobetasol Propionate	Clobetasol Propionate	12	suppressed
Diclofenac Sodium	Diclofenac Sodium	12	suppressed
Ibu	Ibuprofen	12	suppressed
Indapamide	Indapamide	12	suppressed
Invokana	Canagliflozin	12	suppressed
Latanoprost	Latanoprost	12	suppressed
Olanzapine	Olanzapine	12	suppressed
Phenytoin	Phenytoin	12	suppressed
Verapamil Er	Verapamil Hcl	12	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	11	suppressed
Armodafinil	Armodafinil	11	suppressed
Cartia Xt	Diltiazem Hcl	11	suppressed
Colestipol Hcl	Colestipol Hcl	11	suppressed
Desmopressin Acetate	Desmopressin (Nonrefrigerated)	11	suppressed
Desvenlafaxine Succinate Er	Desvenlafaxine Succinate	11	suppressed
Doxepin Hcl	Doxepin Hcl	11	suppressed
Metoclopramide Hcl	Metoclopramide Hcl	11	suppressed
Victoza 3-Pak	Liraglutide	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