Healthcare provider profile · identity verified

William M Kubaska, M.D.

Internal Medicine · DENVER, CO · NPI 1548345101

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	606	160
Levothyroxine Sodium	Levothyroxine Sodium	383	99
Amlodipine Besylate	Amlodipine Besylate	342	85
Lisinopril	Lisinopril	260	73
Losartan Potassium	Losartan Potassium	203	53
Zolpidem Tartrate	Zolpidem Tartrate	178	44
Escitalopram Oxalate	Escitalopram Oxalate	150	42
Rosuvastatin Calcium	Rosuvastatin Calcium	133	35
Tamsulosin Hcl	Tamsulosin Hcl	133	34
Omeprazole	Omeprazole	128	36
Hydrochlorothiazide	Hydrochlorothiazide	126	40
Metformin Hcl	Metformin Hcl	121	35
Trazodone Hcl	Trazodone Hcl	120	31
Eliquis	Apixaban	111	22
Alprazolam	Alprazolam	109	28
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	102	15
Tramadol Hcl	Tramadol Hcl	93	16
Simvastatin	Simvastatin	91	28
Meloxicam	Meloxicam	86	25
Azithromycin	Azithromycin	83	61
Gabapentin	Gabapentin	83	22
Allopurinol	Allopurinol	80	25
Bupropion Xl	Bupropion Hcl	80	17
Sertraline Hcl	Sertraline Hcl	79	19
Oxycodone Hcl	Oxycodone Hcl	75	suppressed
Pantoprazole Sodium	Pantoprazole Sodium	75	22
Synthroid	Levothyroxine Sodium	75	19
Lorazepam	Lorazepam	73	20
Metoprolol Tartrate	Metoprolol Tartrate	73	16
Metoprolol Succinate	Metoprolol Succinate	70	19
Furosemide	Furosemide	67	19
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	65	suppressed
Potassium Chloride	Potassium Chloride	65	17
Duloxetine Hcl	Duloxetine Hcl	59	13
Clonazepam	Clonazepam	56	suppressed
Prednisone	Prednisone	54	35
Amoxicillin	Amoxicillin	53	40
Acyclovir	Acyclovir	45	16
Atenolol	Atenolol	43	13
Citalopram Hbr	Citalopram Hydrobromide	43	12
Xarelto	Rivaroxaban	42	suppressed
Jardiance	Empagliflozin	41	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	41	33
Finasteride	Finasteride	40	suppressed
Propranolol Hcl	Propranolol Hcl	39	suppressed
Clopidogrel	Clopidogrel Bisulfate	38	suppressed
Celecoxib	Celecoxib	37	13
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	37	25
Paxlovid	Nirmatrelvir/Ritonavir	36	34
Tizanidine Hcl	Tizanidine Hcl	36	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	36	suppressed
Diazepam	Diazepam	35	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	35	suppressed
Lovastatin	Lovastatin	35	11
Mounjaro	Tirzepatide	35	suppressed
Albuterol Sulfate Hfa	Albuterol Sulfate	34	18
Lidocaine	Lidocaine	34	suppressed
Ropinirole Hcl	Ropinirole Hcl	34	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	33	suppressed
Tresiba Flextouch U-100	Insulin Degludec	33	suppressed
Carvedilol	Carvedilol	32	suppressed
Donepezil Hcl	Donepezil Hcl	32	suppressed
Ozempic	Semaglutide	31	suppressed
Pravastatin Sodium	Pravastatin Sodium	30	suppressed
Warfarin Sodium	Warfarin Sodium	29	suppressed
Buspirone Hcl	Buspirone Hcl	28	suppressed
Montelukast Sodium	Montelukast Sodium	28	suppressed
Valsartan	Valsartan	28	suppressed
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	27	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	27	suppressed
Paroxetine Hcl	Paroxetine Hcl	27	suppressed
Estradiol	Estradiol	26	suppressed
Soliqua 100-33	Insulin Glargine/Lixisenatide	25	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	24	suppressed
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	24	suppressed
Ondansetron Odt	Ondansetron	23	suppressed
Ezetimibe	Ezetimibe	22	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	22	suppressed
Farxiga	Dapagliflozin Propanediol	21	suppressed
Irbesartan	Irbesartan	21	suppressed
Olmesartan-Hydrochlorothiazide	Olmesartan/Hydrochlorothiazide	21	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	20	15
Levetiracetam	Levetiracetam	20	suppressed
Tresiba Flextouch U-200	Insulin Degludec	20	suppressed
Hydromorphone Hcl	Hydromorphone Hcl	19	suppressed
Ipratropium Bromide	Ipratropium Bromide	19	suppressed
Valacyclovir	Valacyclovir Hcl	18	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	17	11
Humalog	Insulin Lispro	17	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	17	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	17	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	17	suppressed
Cephalexin	Cephalexin	16	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	16	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	16	suppressed
Pregabalin	Pregabalin	16	suppressed
Ezetimibe-Simvastatin	Ezetimibe/Simvastatin	15	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	15	suppressed
Praluent Pen	Alirocumab	15	suppressed
Spironolactone	Spironolactone	15	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	14	suppressed
Enalapril Maleate	Enalapril Maleate	14	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	14	suppressed
Prempro	Estrogen,con/M-Progest Acet	14	suppressed
Bumetanide	Bumetanide	13	suppressed
Butalb-Acetaminoph-Caff-Codein	Butalbit/Acetamin/Caff/Codeine	13	suppressed
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	13	suppressed
Fluticasone Propionate	Fluticasone Propionate	13	suppressed
Lamotrigine	Lamotrigine	13	suppressed
Asa-Butalb-Caffeine-Codeine	Codeine/Butalbital/Asa/Caffein	12	suppressed
Dextroamphetamine-Amphet Er	Dextroamphetamine/Amphetamine	12	suppressed
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	12	suppressed
Lacosamide	Lacosamide	12	suppressed
Novolin 70-30	Insulin Nph Hum/Reg Insulin Hm	12	suppressed
Ondansetron Hcl	Ondansetron Hcl	12	suppressed
Symbicort	Budesonide/Formoterol Fumarate	12	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	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