Healthcare provider profile · identity verified

Michael K Maxwell, M.D.

Internal Medicine · TULSA, OK · NPI 1346219334

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	1066	298
Amlodipine Besylate	Amlodipine Besylate	780	222
Levothyroxine Sodium	Levothyroxine Sodium	694	176
Lisinopril	Lisinopril	679	193
Telmisartan	Telmisartan	427	121
Rosuvastatin Calcium	Rosuvastatin Calcium	416	124
Omeprazole	Omeprazole	394	108
Losartan Potassium	Losartan Potassium	330	100
Hydrochlorothiazide	Hydrochlorothiazide	315	99
Metoprolol Succinate	Metoprolol Succinate	313	94
Gabapentin	Gabapentin	287	69
Potassium Chloride	Potassium Chloride	263	70
Tamsulosin Hcl	Tamsulosin Hcl	224	62
Metformin Hcl	Metformin Hcl	217	66
Citalopram Hbr	Citalopram Hydrobromide	212	56
Metoprolol Tartrate	Metoprolol Tartrate	208	55
Eliquis	Apixaban	204	44
Simvastatin	Simvastatin	170	50
Trazodone Hcl	Trazodone Hcl	162	47
Escitalopram Oxalate	Escitalopram Oxalate	161	41
Allopurinol	Allopurinol	157	40
Furosemide	Furosemide	157	48
Pravastatin Sodium	Pravastatin Sodium	150	48
Pantoprazole Sodium	Pantoprazole Sodium	147	43
Albuterol Sulfate Hfa	Albuterol Sulfate	143	54
Montelukast Sodium	Montelukast Sodium	140	43
Donepezil Hcl	Donepezil Hcl	133	27
Alendronate Sodium	Alendronate Sodium	126	36
Ozempic	Semaglutide	122	23
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	121	40
Carvedilol	Carvedilol	119	37
Meloxicam	Meloxicam	113	30
Lovastatin	Lovastatin	109	27
Duloxetine Hcl	Duloxetine Hcl	93	19
Metformin Hcl Er	Metformin Hcl	93	30
Finasteride	Finasteride	91	24
Clopidogrel	Clopidogrel Bisulfate	85	24
Fluticasone Propionate	Fluticasone Propionate	85	27
Sertraline Hcl	Sertraline Hcl	84	23
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	82	25
Fluoxetine Hcl	Fluoxetine Hcl	82	21
Chlorthalidone	Chlorthalidone	81	22
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	78	19
Famotidine	Famotidine	75	22
Clonazepam	Clonazepam	73	12
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	69	15
Alprazolam	Alprazolam	68	30
Synthroid	Levothyroxine Sodium	68	19
Ezetimibe	Ezetimibe	65	15
Spironolactone	Spironolactone	65	20
Jardiance	Empagliflozin	63	16
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	61	18
Warfarin Sodium	Warfarin Sodium	59	13
Doxazosin Mesylate	Doxazosin Mesylate	58	14
Propranolol Hcl	Propranolol Hcl	58	13
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	56	14
Tramadol Hcl	Tramadol Hcl	55	20
Prednisone	Prednisone	54	36
Amitriptyline Hcl	Amitriptyline Hcl	52	14
Venlafaxine Hcl Er	Venlafaxine Hcl	49	12
Ondansetron Odt	Ondansetron	48	25
Mounjaro	Tirzepatide	47	suppressed
Bupropion Hcl Sr	Bupropion Hcl	46	12
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	45	11
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	45	suppressed
Atenolol	Atenolol	44	13
Paroxetine Hcl	Paroxetine Hcl	44	15
Pregabalin	Pregabalin	44	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	43	18
Wixela Inhub	Fluticasone Propion/Salmeterol	43	16
Memantine Hcl	Memantine Hcl	42	suppressed
Trulicity	Dulaglutide	41	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	40	suppressed
Glimepiride	Glimepiride	40	13
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	39	26
Ultra-Fine Short Pen Needle	Pen Needle, Diabetic	39	suppressed
Novolog Flexpen	Insulin Aspart	37	suppressed
Ropinirole Hcl	Ropinirole Hcl	37	suppressed
Valsartan	Valsartan	37	suppressed
Torsemide	Torsemide	36	11
Estradiol	Estradiol	35	14
Eszopiclone	Eszopiclone	35	suppressed
Bupropion Xl	Bupropion Hcl	34	12
Zolpidem Tartrate	Zolpidem Tartrate	34	16
Mirtazapine	Mirtazapine	33	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	33	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	31	25
Benazepril Hcl	Benazepril Hcl	31	suppressed
Premarin	Estrogens, Conjugated	31	suppressed
Ipratropium Bromide	Ipratropium Bromide	30	12
Venlafaxine Hcl	Venlafaxine Hcl	30	suppressed
Oxycodone Hcl	Oxycodone Hcl	28	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	28	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	27	suppressed
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	26	suppressed
Diclofenac Sodium	Diclofenac Sodium	26	suppressed
Humalog Kwikpen U-100	Insulin Lispro	26	suppressed
Ondansetron Hcl	Ondansetron Hcl	26	suppressed
Hydralazine Hcl	Hydralazine Hcl	25	suppressed
Rizatriptan	Rizatriptan Benzoate	25	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	24	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	24	24
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	24	suppressed
Toujeo Solostar	Insulin Glargine,hum.Rec.Anlog	23	suppressed
Valacyclovir	Valacyclovir Hcl	23	12
Isosorbide Mononitrate Er	Isosorbide Mononitrate	22	suppressed
Xarelto	Rivaroxaban	22	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	21	suppressed
Propranolol Hcl Er	Propranolol Hcl	21	suppressed
Ramipril	Ramipril	21	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	21	17
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	20	suppressed
Nifedipine Er	Nifedipine	20	suppressed
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	19	suppressed
Novolog	Insulin Aspart	19	suppressed
Ventolin Hfa	Albuterol Sulfate	19	suppressed
Azithromycin	Azithromycin	18	18
Enalapril Maleate	Enalapril Maleate	18	suppressed
Fluconazole	Fluconazole	18	11
Ibuprofen	Ibuprofen	18	suppressed
Lorazepam	Lorazepam	18	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	18	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	18	suppressed
Verapamil Er	Verapamil Hcl	18	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	17	11
Baclofen	Baclofen	17	suppressed
Nitroglycerin	Nitroglycerin	17	11
Promethazine Hcl	Promethazine Hcl	17	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	17	suppressed
Tizanidine Hcl	Tizanidine Hcl	17	suppressed
Bevespi Aerosphere	Glycopyrrolate/Formoterol Fum	16	suppressed
Cilostazol	Cilostazol	16	suppressed
Diltiazem Hcl	Diltiazem Hcl	16	suppressed
Colestipol Hcl	Colestipol Hcl	15	suppressed
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	15	suppressed
Memantine Hcl Er	Memantine Hcl	15	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	15	suppressed
Solifenacin Succinate	Solifenacin Succinate	15	suppressed
Alfuzosin Hcl Er	Alfuzosin Hcl	14	suppressed
Breo Ellipta	Fluticasone/Vilanterol	14	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	14	suppressed
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	14	suppressed
Acyclovir	Acyclovir	13	suppressed
Bumetanide	Bumetanide	13	suppressed
Cefpodoxime Proxetil	Cefpodoxime Proxetil	13	13
Indapamide	Indapamide	13	suppressed
Topiramate	Topiramate	13	suppressed
Famciclovir	Famciclovir	12	suppressed
Glipizide	Glipizide	12	suppressed
Invokana	Canagliflozin	12	suppressed
Qvar Redihaler	Beclomethasone Dipropionate	12	suppressed
Sucralfate	Sucralfate	12	suppressed
Cefadroxil	Cefadroxil	11	suppressed
Celecoxib	Celecoxib	11	suppressed
Diazepam	Diazepam	11	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	11	suppressed
Farxiga	Dapagliflozin Propanediol	11	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	11	suppressed
Mupirocin	Mupirocin	11	suppressed
Novolin 70-30	Insulin Nph Hum/Reg Insulin Hm	11	suppressed
Temazepam	Temazepam	11	suppressed
Toujeo Max Solostar	Insulin Glargine,hum.Rec.Anlog	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