Healthcare provider profile · identity verified

William Day Buck, MD

Family Practice · SALINA, KS · NPI 1023060902

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	1168	298
Losartan Potassium	Losartan Potassium	520	126
Levothyroxine Sodium	Levothyroxine Sodium	516	115
Lisinopril	Lisinopril	492	113
Amlodipine Besylate	Amlodipine Besylate	411	94
Pantoprazole Sodium	Pantoprazole Sodium	308	73
Gabapentin	Gabapentin	307	52
Omeprazole	Omeprazole	307	73
Furosemide	Furosemide	296	68
Rosuvastatin Calcium	Rosuvastatin Calcium	291	68
Tamsulosin Hcl	Tamsulosin Hcl	288	55
Metoprolol Tartrate	Metoprolol Tartrate	285	64
Hydrochlorothiazide	Hydrochlorothiazide	242	60
Potassium Chloride	Potassium Chloride	237	50
Eliquis	Apixaban	227	37
Metoprolol Succinate	Metoprolol Succinate	222	52
Ezetimibe	Ezetimibe	207	48
Sertraline Hcl	Sertraline Hcl	182	37
Simvastatin	Simvastatin	177	38
Allopurinol	Allopurinol	162	33
Metformin Hcl	Metformin Hcl	161	38
Warfarin Sodium	Warfarin Sodium	161	26
Metformin Hcl Er	Metformin Hcl	157	37
Carvedilol	Carvedilol	154	27
Duloxetine Hcl	Duloxetine Hcl	147	24
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	140	30
Spironolactone	Spironolactone	134	31
Jardiance	Empagliflozin	130	21
Albuterol Sulfate Hfa	Albuterol Sulfate	123	21
Trazodone Hcl	Trazodone Hcl	123	22
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	119	25
Soliqua 100-33	Insulin Glargine/Lixisenatide	119	19
Glipizide Er	Glipizide	118	22
Pravastatin Sodium	Pravastatin Sodium	117	28
Zolpidem Tartrate	Zolpidem Tartrate	113	24
Tramadol Hcl	Tramadol Hcl	110	20
Atenolol	Atenolol	107	27
Xarelto	Rivaroxaban	107	13
Clopidogrel	Clopidogrel Bisulfate	106	25
Meloxicam	Meloxicam	93	19
Donepezil Hcl	Donepezil Hcl	92	13
Bupropion Xl	Bupropion Hcl	74	13
Escitalopram Oxalate	Escitalopram Oxalate	74	13
Ozempic	Semaglutide	73	13
Mirtazapine	Mirtazapine	70	13
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	70	13
Fluoxetine Hcl	Fluoxetine Hcl	68	13
Alprazolam	Alprazolam	64	14
Fluticasone Propionate	Fluticasone Propionate	64	21
Abrysvo	Rsv Vacc, Pref A And Pref B/Pf	62	62
Montelukast Sodium	Montelukast Sodium	62	13
Diltiazem 24hr Er	Diltiazem Hcl	60	suppressed
Alendronate Sodium	Alendronate Sodium	57	15
Citalopram Hbr	Citalopram Hydrobromide	57	16
Shingrix	Varicella-Zoster Ge/As01b/Pf	57	40
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	55	14
Cephalexin	Cephalexin	53	31
Famotidine	Famotidine	53	16
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	52	13
Oxycodone Hcl	Oxycodone Hcl	51	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	51	suppressed
Glipizide	Glipizide	50	14
Liothyronine Sodium	Liothyronine Sodium	48	suppressed
Memantine Hcl	Memantine Hcl	46	suppressed
Estradiol	Estradiol	45	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	45	suppressed
Ropinirole Hcl	Ropinirole Hcl	43	suppressed
Trulicity	Dulaglutide	41	suppressed
Finasteride	Finasteride	40	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	39	26
Myrbetriq	Mirabegron	38	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	38	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	37	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	34	suppressed
Boostrix Tdap	Diphth,pertuss(Acell),tet Vac	34	34
Digoxin	Digoxin	34	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	34	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	33	suppressed
Pregabalin	Pregabalin	33	suppressed
Varenicline Tartrate	Varenicline Tartrate	33	suppressed
Amoxicillin	Amoxicillin	32	15
Glimepiride	Glimepiride	30	suppressed
Methocarbamol	Methocarbamol	30	suppressed
Lorazepam	Lorazepam	28	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	27	suppressed
Januvia	Sitagliptin Phosphate	27	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	27	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	26	suppressed
Enalapril Maleate	Enalapril Maleate	26	suppressed
Propranolol Hcl	Propranolol Hcl	26	suppressed
Paroxetine Hcl	Paroxetine Hcl	25	suppressed
Tizanidine Hcl	Tizanidine Hcl	24	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	23	suppressed
Synthroid	Levothyroxine Sodium	23	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	22	12
Primidone	Primidone	22	suppressed
Tresiba Flextouch U-100	Insulin Degludec	21	suppressed
Chlorthalidone	Chlorthalidone	20	suppressed
Doxepin Hcl	Doxepin Hcl	20	suppressed
Ondansetron Hcl	Ondansetron Hcl	20	suppressed
Prednisone	Prednisone	20	13
Valsartan	Valsartan	20	suppressed
Clonazepam	Clonazepam	19	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	19	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	19	suppressed
Baclofen	Baclofen	18	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	18	suppressed
Fluconazole	Fluconazole	18	11
Ketoconazole	Ketoconazole	18	11
Ventolin Hfa	Albuterol Sulfate	18	suppressed
Buspirone Hcl	Buspirone Hcl	17	suppressed
Colchicine	Colchicine	17	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	17	suppressed
Klor-Con M20	Potassium Chloride	17	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	17	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	16	14
Spiriva Respimat	Tiotropium Bromide	16	suppressed
Symbicort	Budesonide/Formoterol Fumarate	16	suppressed
Terazosin Hcl	Terazosin Hcl	16	suppressed
Azithromycin	Azithromycin	15	15
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	15	suppressed
Entresto	Sacubitril/Valsartan	15	suppressed
Irbesartan	Irbesartan	15	suppressed
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	15	suppressed
Celecoxib	Celecoxib	14	suppressed
Insulin Aspart Flexpen	Insulin Aspart	14	suppressed
Ramipril	Ramipril	14	suppressed
Ultra-Fine Nano Pen Needle	Pen Needle, Diabetic	14	suppressed
Bisoprolol-Hydrochlorothiazide	Bisoprolol/Hydrochlorothiazide	13	suppressed
Bumetanide	Bumetanide	13	suppressed
Repatha Sureclick	Evolocumab	13	suppressed
Tradjenta	Linagliptin	13	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	12	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	12	suppressed
Lactulose	Lactulose	12	suppressed
Lovastatin	Lovastatin	12	suppressed
Naproxen	Naproxen	12	suppressed
Ondansetron Odt	Ondansetron	12	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	11	suppressed
Incruse Ellipta	Umeclidinium Bromide	11	suppressed
Invokana	Canagliflozin	11	suppressed
Valacyclovir	Valacyclovir Hcl	11	suppressed
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	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