Healthcare provider profile · identity verified

Isaac Tan, M.D.

Internal Medicine · PEORIA, IL · NPI 1710336631

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	1024	286
Losartan Potassium	Losartan Potassium	546	153
Amlodipine Besylate	Amlodipine Besylate	440	120
Levothyroxine Sodium	Levothyroxine Sodium	422	124
Lisinopril	Lisinopril	418	120
Omeprazole	Omeprazole	321	94
Hydrochlorothiazide	Hydrochlorothiazide	307	87
Simvastatin	Simvastatin	296	94
Metformin Hcl	Metformin Hcl	223	66
Gabapentin	Gabapentin	216	70
Metoprolol Succinate	Metoprolol Succinate	207	63
Rosuvastatin Calcium	Rosuvastatin Calcium	193	60
Sertraline Hcl	Sertraline Hcl	173	51
Warfarin Sodium	Warfarin Sodium	145	39
Metoprolol Tartrate	Metoprolol Tartrate	140	41
Furosemide	Furosemide	138	51
Tamsulosin Hcl	Tamsulosin Hcl	138	42
Clopidogrel	Clopidogrel Bisulfate	132	33
Tramadol Hcl	Tramadol Hcl	127	30
Pantoprazole Sodium	Pantoprazole Sodium	123	36
Lorazepam	Lorazepam	120	33
Pravastatin Sodium	Pravastatin Sodium	117	32
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	110	33
Albuterol Sulfate Hfa	Albuterol Sulfate	102	37
Alendronate Sodium	Alendronate Sodium	99	30
Eliquis	Apixaban	95	31
Allopurinol	Allopurinol	91	32
Potassium Chloride	Potassium Chloride	89	32
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	86	22
Glimepiride	Glimepiride	84	25
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	83	23
Zolpidem Tartrate	Zolpidem Tartrate	81	17
Alprazolam	Alprazolam	80	17
Glipizide Er	Glipizide	80	25
Ozempic	Semaglutide	78	21
Pioglitazone Hcl	Pioglitazone Hcl	78	15
Ezetimibe	Ezetimibe	77	25
Fluticasone Propionate	Fluticasone Propionate	77	30
Carvedilol	Carvedilol	76	23
Duloxetine Hcl	Duloxetine Hcl	75	17
Fluoxetine Hcl	Fluoxetine Hcl	67	24
Jardiance	Empagliflozin	67	17
Paroxetine Hcl	Paroxetine Hcl	65	20
Metformin Hcl Er	Metformin Hcl	64	20
Citalopram Hbr	Citalopram Hydrobromide	63	16
Escitalopram Oxalate	Escitalopram Oxalate	61	23
Montelukast Sodium	Montelukast Sodium	61	23
Spironolactone	Spironolactone	60	25
Meloxicam	Meloxicam	52	23
Hydralazine Hcl	Hydralazine Hcl	50	14
Cephalexin	Cephalexin	48	29
Quetiapine Fumarate	Quetiapine Fumarate	46	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	45	suppressed
Atenolol	Atenolol	44	13
Celecoxib	Celecoxib	43	suppressed
Chlorthalidone	Chlorthalidone	43	13
Famotidine	Famotidine	43	13
Propranolol Hcl Er	Propranolol Hcl	42	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	40	13
Prednisone	Prednisone	39	20
Xarelto	Rivaroxaban	39	11
Donepezil Hcl	Donepezil Hcl	38	suppressed
Finasteride	Finasteride	38	12
Trazodone Hcl	Trazodone Hcl	38	12
Clonazepam	Clonazepam	37	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	37	13
Glipizide	Glipizide	34	12
Acetaminophen-Codeine	Acetaminophen With Codeine	33	suppressed
Telmisartan	Telmisartan	33	suppressed
Memantine Hcl	Memantine Hcl	31	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	30	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	30	16
Symbicort	Budesonide/Formoterol Fumarate	30	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	29	13
Myrbetriq	Mirabegron	29	suppressed
Synthroid	Levothyroxine Sodium	29	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	27	17
Lovastatin	Lovastatin	26	suppressed
Buspirone Hcl	Buspirone Hcl	25	suppressed
Ibuprofen	Ibuprofen	24	suppressed
Ropinirole Hcl	Ropinirole Hcl	24	suppressed
Januvia	Sitagliptin Phosphate	23	suppressed
Mounjaro	Tirzepatide	23	suppressed
Nifedipine Er	Nifedipine	22	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	21	suppressed
Labetalol Hcl	Labetalol Hcl	21	suppressed
Meclizine Hcl	Meclizine Hcl	21	12
Ondansetron Odt	Ondansetron	21	suppressed
Risperidone	Risperidone	21	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	20	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	20	19
Sumatriptan Succinate	Sumatriptan Succinate	20	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	20	suppressed
Anastrozole	Anastrozole	19	suppressed
Nitroglycerin	Nitroglycerin	19	14
Testosterone Cypionate	Testosterone Cypionate	19	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	18	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	18	16
Sildenafil Citrate	Sildenafil Citrate	18	suppressed
Enalapril Maleate	Enalapril Maleate	17	suppressed
Fenofibrate	Fenofibrate	17	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	16	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	16	suppressed
Invokana	Canagliflozin	16	suppressed
Lansoprazole	Lansoprazole	16	suppressed
Tizanidine Hcl	Tizanidine Hcl	16	suppressed
Ventolin Hfa	Albuterol Sulfate	16	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	15	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	15	suppressed
Torsemide	Torsemide	15	suppressed
Clonidine Hcl	Clonidine Hcl	14	suppressed
Felodipine Er	Felodipine	14	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	14	suppressed
Mirtazapine	Mirtazapine	14	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	14	13
Novolog Flexpen	Insulin Aspart	14	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	13	suppressed
Azelastine Hcl	Azelastine Hcl	13	suppressed
Baclofen	Baclofen	13	suppressed
Breo Ellipta	Fluticasone/Vilanterol	13	suppressed
Klor-Con M20	Potassium Chloride	13	suppressed
Lactulose	Lactulose	13	suppressed
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	13	suppressed
Nabumetone	Nabumetone	13	suppressed
Verapamil Er	Verapamil Hcl	13	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	12	suppressed
Loperamide	Loperamide Hcl	12	suppressed
Mesalamine Er	Mesalamine	12	suppressed
Nystatin	Nystatin	12	suppressed
Oxycodone Hcl	Oxycodone Hcl	12	suppressed
Ziprasidone Hcl	Ziprasidone Hcl	12	suppressed
Azithromycin	Azithromycin	11	11
Brilinta	Ticagrelor	11	suppressed
Bupropion Xl	Bupropion Hcl	11	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	11	11
Fenofibrate	Fenofibrate,micronized	11	suppressed
Humulin 70-30	Insulin Nph Hum/Reg Insulin Hm	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