Healthcare provider profile · identity verified

Bryon S. Bigham, M.D.

Family Practice · TOPEKA, KS · NPI 1518053594

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	651	174
Atorvastatin Calcium	Atorvastatin Calcium	432	127
Omeprazole	Omeprazole	395	112
Lisinopril	Lisinopril	364	99
Amlodipine Besylate	Amlodipine Besylate	329	94
Losartan Potassium	Losartan Potassium	317	93
Simvastatin	Simvastatin	317	94
Tamsulosin Hcl	Tamsulosin Hcl	294	85
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	233	42
Gabapentin	Gabapentin	232	69
Zolpidem Tartrate	Zolpidem Tartrate	208	31
Hydrochlorothiazide	Hydrochlorothiazide	201	62
Alprazolam	Alprazolam	188	38
Famotidine	Famotidine	183	43
Pantoprazole Sodium	Pantoprazole Sodium	179	60
Tramadol Hcl	Tramadol Hcl	177	44
Metoprolol Succinate	Metoprolol Succinate	170	54
Tizanidine Hcl	Tizanidine Hcl	150	30
Oxycodone Hcl	Oxycodone Hcl	144	26
Metformin Hcl	Metformin Hcl	142	48
Allopurinol	Allopurinol	137	29
Escitalopram Oxalate	Escitalopram Oxalate	133	28
Rosuvastatin Calcium	Rosuvastatin Calcium	133	41
Duloxetine Hcl	Duloxetine Hcl	132	39
Lorazepam	Lorazepam	125	20
Montelukast Sodium	Montelukast Sodium	125	35
Pravastatin Sodium	Pravastatin Sodium	121	41
Albuterol Sulfate Hfa	Albuterol Sulfate	120	51
Trazodone Hcl	Trazodone Hcl	118	36
Meloxicam	Meloxicam	116	33
Alendronate Sodium	Alendronate Sodium	112	39
Fluticasone Propionate	Fluticasone Propionate	111	47
Metformin Hcl Er	Metformin Hcl	109	35
Clonazepam	Clonazepam	108	20
Metoprolol Tartrate	Metoprolol Tartrate	95	26
Atenolol	Atenolol	92	27
Finasteride	Finasteride	92	31
Promethazine Hcl	Promethazine Hcl	91	suppressed
Sertraline Hcl	Sertraline Hcl	91	28
Warfarin Sodium	Warfarin Sodium	90	15
Potassium Chloride	Potassium Chloride	89	23
Carvedilol	Carvedilol	86	28
Citalopram Hbr	Citalopram Hydrobromide	85	21
Furosemide	Furosemide	81	31
Eliquis	Apixaban	80	20
Diclofenac Sodium	Diclofenac Sodium	76	39
Olmesartan Medoxomil	Olmesartan Medoxomil	74	18
Ozempic	Semaglutide	72	21
Ondansetron Odt	Ondansetron	66	14
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	64	21
Buspirone Hcl	Buspirone Hcl	60	13
Prednisone	Prednisone	60	37
Venlafaxine Hcl Er	Venlafaxine Hcl	59	16
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	57	16
Diazepam	Diazepam	55	suppressed
Ezetimibe	Ezetimibe	55	22
Triamcinolone Acetonide	Triamcinolone Acetonide	52	32
Clopidogrel	Clopidogrel Bisulfate	51	17
Synthroid	Levothyroxine Sodium	51	15
Celecoxib	Celecoxib	50	17
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	50	21
Jardiance	Empagliflozin	49	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	49	12
Spironolactone	Spironolactone	49	18
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	48	11
Carbidopa-Levodopa	Carbidopa/Levodopa	46	14
Fluoxetine Hcl	Fluoxetine Hcl	46	15
Acetaminophen-Codeine	Acetaminophen With Codeine	45	suppressed
Pregabalin	Pregabalin	44	15
Morphine Sulfate Er	Morphine Sulfate	42	suppressed
Baclofen	Baclofen	40	suppressed
Donepezil Hcl	Donepezil Hcl	40	15
Glimepiride	Glimepiride	39	14
Ropinirole Hcl	Ropinirole Hcl	39	14
Hydroxyzine Hcl	Hydroxyzine Hcl	38	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	34	27
Oxybutynin Chloride Er	Oxybutynin Chloride	33	suppressed
Estradiol	Estradiol	32	18
Farxiga	Dapagliflozin Propanediol	32	suppressed
Desvenlafaxine Succinate Er	Desvenlafaxine Succinate	30	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	30	suppressed
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	30	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	29	suppressed
Eszopiclone	Eszopiclone	29	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	29	suppressed
Paroxetine Hcl	Paroxetine Hcl	29	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	29	17
Breo Ellipta	Fluticasone/Vilanterol	28	suppressed
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	28	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	28	suppressed
Memantine Hcl	Memantine Hcl	28	suppressed
Propranolol Hcl	Propranolol Hcl	28	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	28	suppressed
Amiodarone Hcl	Amiodarone Hcl	27	suppressed
Cefuroxime	Cefuroxime Axetil	27	22
Torsemide	Torsemide	27	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	26	suppressed
Glipizide	Glipizide	25	suppressed
Nystatin	Nystatin	25	12
Bupropion Hcl Sr	Bupropion Hcl	24	suppressed
Bupropion Xl	Bupropion Hcl	24	suppressed
Temazepam	Temazepam	24	suppressed
Azithromycin	Azithromycin	23	19
Novolog Flexpen	Insulin Aspart	22	suppressed
Ramipril	Ramipril	22	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	22	suppressed
Acyclovir	Acyclovir	21	suppressed
Ipratropium Bromide	Ipratropium Bromide	21	suppressed
Tolterodine Tartrate Er	Tolterodine Tartrate	21	suppressed
Clonidine Hcl	Clonidine Hcl	20	suppressed
Hydralazine Hcl	Hydralazine Hcl	20	suppressed
Ketoconazole	Ketoconazole	20	suppressed
Lovastatin	Lovastatin	20	suppressed
Scopolamine	Scopolamine	20	suppressed
Amoxicillin	Amoxicillin	19	15
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	19	14
Valacyclovir	Valacyclovir Hcl	19	suppressed
Varenicline Tartrate	Varenicline Tartrate	19	suppressed
Ventolin Hfa	Albuterol Sulfate	19	suppressed
Xarelto	Rivaroxaban	19	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	18	suppressed
Fluconazole	Fluconazole	17	11
Januvia	Sitagliptin Phosphate	17	suppressed
Propranolol Hcl Er	Propranolol Hcl	17	suppressed
Raloxifene Hcl	Raloxifene Hcl	17	suppressed
Sodium Chloride	0.9 % Sodium Chloride	17	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	17	suppressed
Fentanyl	Fentanyl	16	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	16	suppressed
Ondansetron Hcl	Ondansetron Hcl	16	suppressed
Dextroamphetamine-Amphet Er	Dextroamphetamine/Amphetamine	15	suppressed
Morphine Sulfate	Morphine Sulfate	15	suppressed
Valsartan	Valsartan	15	suppressed
Betamethasone Dipropionate	Betamethasone Dipropionate	14	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	14	suppressed
Metoclopramide Hcl	Metoclopramide Hcl	14	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	14	14
Zolpidem Tartrate Er	Zolpidem Tartrate	14	suppressed
Cephalexin	Cephalexin	13	suppressed
Chlorthalidone	Chlorthalidone	13	suppressed
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	13	suppressed
Latanoprost	Latanoprost	13	suppressed
Advair Hfa	Fluticasone Propion/Salmeterol	12	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	12	suppressed
Anastrozole	Anastrozole	12	suppressed
Breyna	Budesonide/Formoterol Fumarate	12	suppressed
Diltiazem 24hr Er	Diltiazem Hcl	12	suppressed
Hydrocortisone	Hydrocortisone	12	suppressed
Lansoprazole	Lansoprazole	12	suppressed
Meclizine Hcl	Meclizine Hcl	12	suppressed
Mirtazapine	Mirtazapine	12	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	11	suppressed
Clobetasol Propionate	Clobetasol Propionate	11	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	11	suppressed
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	11	suppressed
Klor-Con M20	Potassium Chloride	11	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	11	suppressed
Prochlorperazine Maleate	Prochlorperazine Maleate	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