Healthcare provider profile · identity verified

William Mark Barnett, M.D.

Family Practice · ROLLA, MO · NPI 1982990214

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
Lisinopril	Lisinopril	500	114
Levothyroxine Sodium	Levothyroxine Sodium	488	106
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	435	65
Atorvastatin Calcium	Atorvastatin Calcium	421	118
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	408	90
Omeprazole	Omeprazole	358	66
Gabapentin	Gabapentin	333	63
Amlodipine Besylate	Amlodipine Besylate	318	78
Hydrochlorothiazide	Hydrochlorothiazide	316	84
Metformin Hcl	Metformin Hcl	265	60
Furosemide	Furosemide	258	60
Alprazolam	Alprazolam	248	37
Losartan Potassium	Losartan Potassium	233	60
Montelukast Sodium	Montelukast Sodium	228	43
Pantoprazole Sodium	Pantoprazole Sodium	223	64
Pravastatin Sodium	Pravastatin Sodium	223	63
Simvastatin	Simvastatin	183	37
Metoprolol Succinate	Metoprolol Succinate	181	47
Albuterol Sulfate Hfa	Albuterol Sulfate	177	46
Fluticasone Propionate	Fluticasone Propionate	169	45
Tramadol Hcl	Tramadol Hcl	167	37
Oxycodone Hcl	Oxycodone Hcl	166	35
Trazodone Hcl	Trazodone Hcl	155	32
Tamsulosin Hcl	Tamsulosin Hcl	151	38
Glimepiride	Glimepiride	149	33
Famotidine	Famotidine	145	37
Sertraline Hcl	Sertraline Hcl	144	37
Tizanidine Hcl	Tizanidine Hcl	136	23
Prednisone	Prednisone	125	78
Allopurinol	Allopurinol	118	30
Zolpidem Tartrate	Zolpidem Tartrate	118	22
Potassium Chloride	Potassium Chloride	116	30
Carvedilol	Carvedilol	110	27
Bupropion Xl	Bupropion Hcl	106	24
Meloxicam	Meloxicam	103	22
Rosuvastatin Calcium	Rosuvastatin Calcium	100	29
Morphine Sulfate Er	Morphine Sulfate	97	16
Baclofen	Baclofen	96	15
Spironolactone	Spironolactone	96	28
Ropinirole Hcl	Ropinirole Hcl	95	13
Metoprolol Tartrate	Metoprolol Tartrate	91	21
Duloxetine Hcl	Duloxetine Hcl	87	22
Clonazepam	Clonazepam	86	18
Eliquis	Apixaban	86	20
Celecoxib	Celecoxib	85	15
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	83	19
Metformin Hcl Er	Metformin Hcl	79	18
Buspirone Hcl	Buspirone Hcl	78	14
Mirtazapine	Mirtazapine	78	17
Ondansetron Odt	Ondansetron	78	17
Temazepam	Temazepam	78	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	77	21
Quetiapine Fumarate	Quetiapine Fumarate	75	11
Clopidogrel	Clopidogrel Bisulfate	72	18
Propranolol Hcl	Propranolol Hcl	72	16
Amitriptyline Hcl	Amitriptyline Hcl	70	13
Venlafaxine Hcl Er	Venlafaxine Hcl	68	12
Jardiance	Empagliflozin	67	12
Lorazepam	Lorazepam	66	17
Buprenorphine-Naloxone	Buprenorphine Hcl/Naloxone Hcl	62	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	60	suppressed
Paroxetine Hcl	Paroxetine Hcl	59	13
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	56	17
Carisoprodol	Carisoprodol	53	suppressed
Ibuprofen	Ibuprofen	53	14
Dicyclomine Hcl	Dicyclomine Hcl	50	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	50	suppressed
Levetiracetam	Levetiracetam	50	suppressed
Promethazine Hcl	Promethazine Hcl	50	suppressed
Ozempic	Semaglutide	49	suppressed
Glipizide	Glipizide	48	14
Irbesartan	Irbesartan	45	suppressed
Naproxen	Naproxen	45	16
Symbicort	Budesonide/Formoterol Fumarate	45	suppressed
Gemfibrozil	Gemfibrozil	40	suppressed
Ventolin Hfa	Albuterol Sulfate	40	14
Sucralfate	Sucralfate	39	11
Topiramate	Topiramate	39	suppressed
Rizatriptan	Rizatriptan Benzoate	38	suppressed
Clonidine Hcl	Clonidine Hcl	37	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	37	11
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	36	suppressed
Warfarin Sodium	Warfarin Sodium	36	suppressed
Atenolol	Atenolol	35	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	35	suppressed
Constulose	Lactulose	34	suppressed
Fentanyl	Fentanyl	34	suppressed
Finasteride	Finasteride	34	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	34	suppressed
Nystatin	Nystatin	34	18
Pregabalin	Pregabalin	34	11
Testosterone Cypionate	Testosterone Cypionate	34	suppressed
Citalopram Hbr	Citalopram Hydrobromide	33	suppressed
Alendronate Sodium	Alendronate Sodium	31	suppressed
Estradiol	Estradiol	31	suppressed
Meclizine Hcl	Meclizine Hcl	31	11
Entresto	Sacubitril/Valsartan	30	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	30	suppressed
Januvia	Sitagliptin Phosphate	30	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	30	suppressed
Carbamazepine	Carbamazepine	29	suppressed
Vascepa	Icosapent Ethyl	29	suppressed
Diazepam	Diazepam	28	suppressed
Diclofenac Sodium	Diclofenac Sodium	28	suppressed
Escitalopram Oxalate	Escitalopram Oxalate	28	suppressed
Fenofibrate	Fenofibrate	28	suppressed
Synthroid	Levothyroxine Sodium	28	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	27	suppressed
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	27	suppressed
Nitroglycerin	Nitroglycerin	27	11
Fenofibrate	Fenofibrate Nanocrystallized	26	suppressed
Torsemide	Torsemide	25	suppressed
Aripiprazole	Aripiprazole	24	suppressed
Mounjaro	Tirzepatide	24	suppressed
Xtampza Er	Oxycodone Myristate	24	suppressed
Boostrix Tdap	Diphth,pertuss(Acell),tet Vac	23	23
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	22	suppressed
Humalog Kwikpen U-100	Insulin Lispro	22	suppressed
Ondansetron Hcl	Ondansetron Hcl	22	suppressed
Enalapril Maleate	Enalapril Maleate	21	suppressed
Hydralazine Hcl	Hydralazine Hcl	21	suppressed
Novolog Flexpen	Insulin Aspart	21	suppressed
Olanzapine	Olanzapine	20	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	20	suppressed
Azithromycin	Azithromycin	19	14
Combivent Respimat	Ipratropium/Albuterol Sulfate	19	suppressed
Lansoprazole	Lansoprazole	19	suppressed
Methocarbamol	Methocarbamol	19	suppressed
Digoxin	Digoxin	18	suppressed
Diltiazem Hcl	Diltiazem Hcl	18	suppressed
Loperamide	Loperamide Hcl	18	suppressed
Mupirocin	Mupirocin	18	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	18	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	18	suppressed
Ramipril	Ramipril	18	suppressed
Belsomra	Suvorexant	17	suppressed
Fluconazole	Fluconazole	17	12
Metoclopramide Hcl	Metoclopramide Hcl	17	suppressed
Nabumetone	Nabumetone	17	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	17	suppressed
Xarelto	Rivaroxaban	17	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	16	suppressed
Lacosamide	Lacosamide	16	suppressed
Prochlorperazine Maleate	Prochlorperazine Maleate	16	suppressed
Shingrix	Varicella-Zoster Ge/As01b/Pf	16	suppressed
Ultra-Fine Short Pen Needle	Pen Needle, Diabetic	16	suppressed
Bupropion Hcl Sr	Bupropion Hcl	15	suppressed
Lactulose	Lactulose	15	suppressed
Pentips Pen Needle	Pen Needle, Diabetic	15	suppressed
Primidone	Primidone	15	suppressed
Acyclovir	Acyclovir	14	suppressed
Arnuity Ellipta	Fluticasone Furoate	14	suppressed
Benazepril Hcl	Benazepril Hcl	14	suppressed
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	14	suppressed
Glipizide Er	Glipizide	14	suppressed
Hydromorphone Hcl	Hydromorphone Hcl	14	suppressed
Trulicity	Dulaglutide	14	suppressed
Abrysvo	Rsv Vacc, Pref A And Pref B/Pf	13	13
Acetaminophen-Codeine	Acetaminophen With Codeine	13	suppressed
Entecavir	Entecavir	13	suppressed
Invega Sustenna	Paliperidone Palmitate	13	suppressed
Janumet Xr	Sitagliptin Phos/Metformin Hcl	13	suppressed
Levemir Flexpen	Insulin Detemir	13	suppressed
Morphine Sulfate	Morphine Sulfate	13	suppressed
Oxcarbazepine	Oxcarbazepine	13	suppressed
Quetiapine Fumarate Er	Quetiapine Fumarate	13	suppressed
Trimethoprim	Trimethoprim	13	suppressed
Aimovig Autoinjector	Erenumab-Aooe	12	suppressed
Azelastine Hcl	Azelastine Hcl	12	suppressed
Calcitriol	Calcitriol	12	suppressed
Dextroamphetamine-Amphet Er	Dextroamphetamine/Amphetamine	12	suppressed
Diltiazem 24hr Er (Xr)	Diltiazem Hcl	12	suppressed
Ezetimibe	Ezetimibe	12	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	12	suppressed
Norvasc	Amlodipine Besylate	12	suppressed
Novolin R	Insulin Regular, Human	12	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	12	suppressed
Rebif Rebidose	Interferon Beta-1a/Albumin	12	suppressed
Techlite Pen Needle	Pen Needle, Diabetic	12	suppressed
Tegretol	Carbamazepine	12	suppressed
Ursodiol	Ursodiol	12	suppressed
Advair Hfa	Fluticasone Propion/Salmeterol	11	suppressed
Amoxicillin	Amoxicillin	11	suppressed
Benazepril-Hydrochlorothiazide	Benazepril/Hydrochlorothiazide	11	suppressed
Breo Ellipta	Fluticasone/Vilanterol	11	suppressed
Indapamide	Indapamide	11	suppressed
Ipratropium Bromide	Ipratropium Bromide	11	suppressed
Oxycontin	Oxycodone Hcl	11	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	11	suppressed
Testosterone	Testosterone	11	suppressed
Vilazodone Hcl	Vilazodone 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

Full methodology · Questions & answers · Report a possible error