Healthcare provider profile · identity verified

Brian P O'Sullivan

Internal Medicine · CENTENNIAL, CO · NPI 1801926662

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	1276	361
Levothyroxine Sodium	Levothyroxine Sodium	750	198
Simvastatin	Simvastatin	714	197
Lisinopril	Lisinopril	693	189
Omeprazole	Omeprazole	629	203
Tamsulosin Hcl	Tamsulosin Hcl	557	174
Amlodipine Besylate	Amlodipine Besylate	545	166
Losartan Potassium	Losartan Potassium	522	159
Rosuvastatin Calcium	Rosuvastatin Calcium	475	138
Alendronate Sodium	Alendronate Sodium	343	102
Pradaxa	Dabigatran Etexilate Mesylate	341	109
Metoprolol Tartrate	Metoprolol Tartrate	335	100
Hydrochlorothiazide	Hydrochlorothiazide	293	85
Pantoprazole Sodium	Pantoprazole Sodium	265	84
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	251	71
Metformin Hcl	Metformin Hcl	245	72
Allopurinol	Allopurinol	221	69
Trazodone Hcl	Trazodone Hcl	218	62
Finasteride	Finasteride	210	63
Albuterol Sulfate Hfa	Albuterol Sulfate	200	93
Gabapentin	Gabapentin	181	65
Atenolol	Atenolol	169	48
Fluoxetine Hcl	Fluoxetine Hcl	150	44
Furosemide	Furosemide	142	55
Ezetimibe	Ezetimibe	138	42
Glipizide	Glipizide	138	42
Metoprolol Succinate	Metoprolol Succinate	138	44
Arexvy	Rsvpref3 Antigen/As01e/Pf	137	137
Potassium Chloride	Potassium Chloride	133	51
Wixela Inhub	Fluticasone Propion/Salmeterol	127	42
Duloxetine Hcl	Duloxetine Hcl	126	46
Warfarin Sodium	Warfarin Sodium	115	37
Fluticasone Propionate	Fluticasone Propionate	111	42
Citalopram Hbr	Citalopram Hydrobromide	108	31
Famotidine	Famotidine	105	30
Mirtazapine	Mirtazapine	104	37
Adacel Tdap	Diph,pertuss(Acell),tet Vac/Pf	102	102
Meloxicam	Meloxicam	100	41
Jardiance	Empagliflozin	98	31
Sertraline Hcl	Sertraline Hcl	95	32
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	94	27
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	91	25
Oxycodone Hcl	Oxycodone Hcl	90	21
Carvedilol	Carvedilol	85	30
Clopidogrel	Clopidogrel Bisulfate	85	25
Acyclovir	Acyclovir	83	29
Metformin Hcl Er	Metformin Hcl	81	25
Estradiol	Estradiol	80	35
Prednisone	Prednisone	80	49
Bupropion Xl	Bupropion Hcl	78	26
Tadalafil	Tadalafil	78	12
Spiriva Respimat	Tiotropium Bromide	76	25
Venlafaxine Hcl Er	Venlafaxine Hcl	72	22
Spironolactone	Spironolactone	71	22
Alvesco	Ciclesonide	69	33
Celecoxib	Celecoxib	67	32
Ozempic	Semaglutide	67	suppressed
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	65	suppressed
Propranolol Hcl	Propranolol Hcl	65	20
Zolpidem Tartrate	Zolpidem Tartrate	65	12
Triamcinolone Acetonide	Triamcinolone Acetonide	64	41
Doxazosin Mesylate	Doxazosin Mesylate	62	18
Humulin N	Insulin Nph Human Isophane	59	21
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	58	25
Azelastine Hcl	Azelastine Hcl	57	20
Eliquis	Apixaban	57	13
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	55	18
Doxycycline Hyclate	Doxycycline Hyclate	48	22
Verapamil Er	Verapamil Hcl	46	15
Solifenacin Succinate	Solifenacin Succinate	45	18
Doxycycline Monohydrate	Doxycycline Monohydrate	44	30
Escitalopram Oxalate	Escitalopram Oxalate	42	suppressed
Trospium Chloride	Trospium Chloride	42	14
Lorazepam	Lorazepam	39	18
Repatha Sureclick	Evolocumab	39	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	39	suppressed
Digoxin	Digoxin	38	suppressed
Donepezil Hcl	Donepezil Hcl	37	suppressed
Lovastatin	Lovastatin	36	suppressed
Shingrix	Varicella-Zoster Ge/As01b/Pf	36	34
Tramadol Hcl	Tramadol Hcl	36	suppressed
Nitroglycerin	Nitroglycerin	34	20
Isosorbide Mononitrate Er	Isosorbide Mononitrate	33	suppressed
Montelukast Sodium	Montelukast Sodium	33	11
Testosterone	Testosterone	33	suppressed
Valacyclovir	Valacyclovir Hcl	33	suppressed
Cephalexin	Cephalexin	32	12
Temazepam	Temazepam	32	suppressed
Dabigatran Etexilate	Dabigatran Etexilate Mesylate	31	30
Insulin Syringe	Syringe-Needle,insulin,0.5 Ml	31	15
Pioglitazone Hcl	Pioglitazone Hcl	31	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	27	24
Breyna	Budesonide/Formoterol Fumarate	27	suppressed
Pravastatin Sodium	Pravastatin Sodium	27	suppressed
Pregabalin	Pregabalin	24	suppressed
Hydrocortisone	Hydrocortisone	22	suppressed
Potassium Citrate Er	Potassium Citrate	22	suppressed
Cefuroxime	Cefuroxime Axetil	21	21
Stiolto Respimat	Tiotropium Br/Olodaterol Hcl	20	suppressed
Carbidopa-Levodopa Er	Carbidopa/Levodopa	18	suppressed
Chlorthalidone	Chlorthalidone	18	suppressed
Colchicine	Colchicine	18	suppressed
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	18	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	18	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	18	14
Torsemide	Torsemide	18	suppressed
Clonazepam	Clonazepam	17	suppressed
Dicloxacillin Sodium	Dicloxacillin Sodium	17	16
Azithromycin	Azithromycin	16	13
Insulin Syringe	Syringe And Needle,insulin,1ml	16	suppressed
Metronidazole	Metronidazole	16	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	16	14
Liothyronine Sodium	Liothyronine Sodium	15	suppressed
Methylphenidate Hcl	Methylphenidate Hcl	15	suppressed
Amoxicillin	Amoxicillin	14	suppressed
Clobetasol Propionate	Clobetasol Propionate	14	suppressed
Hydralazine Hcl	Hydralazine Hcl	14	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	14	suppressed
Ropinirole Hcl	Ropinirole Hcl	14	suppressed
Cholestyramine	Cholestyramine (With Sugar)	13	suppressed
Glimepiride	Glimepiride	13	suppressed
Ketoconazole	Ketoconazole	13	suppressed
Paroxetine Hcl	Paroxetine Hcl	13	suppressed
Alprazolam	Alprazolam	12	suppressed
Cartia Xt	Diltiazem Hcl	12	suppressed
Humalog	Insulin Lispro	12	suppressed
Humulin R	Insulin Regular, Human	12	suppressed
Ipratropium Bromide	Ipratropium Bromide	12	suppressed
Memantine Hcl	Memantine Hcl	12	suppressed
Oxycontin	Oxycodone Hcl	12	suppressed
Primidone	Primidone	12	suppressed
Chlordiazepoxide Hcl	Chlordiazepoxide Hcl	11	suppressed
Cholestyramine Light	Cholestyramine	11	suppressed
Humulin N Kwikpen	Insulin Nph Human Isophane	11	suppressed
Latanoprost	Latanoprost	11	suppressed
Medroxyprogesterone Acetate	Medroxyprogesterone Acetate	11	suppressed
Methylprednisolone	Methylprednisolone	11	suppressed
Ondansetron Hcl	Ondansetron 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