Healthcare provider profile · identity verified

Peter D Kerstan, MD

Family Practice · PARK RIDGE, IL · NPI 1780687301

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	977	284
Levothyroxine Sodium	Levothyroxine Sodium	712	177
Amlodipine Besylate	Amlodipine Besylate	657	183
Losartan Potassium	Losartan Potassium	594	162
Metoprolol Succinate	Metoprolol Succinate	483	132
Lisinopril	Lisinopril	387	110
Metformin Hcl	Metformin Hcl	319	93
Hydrochlorothiazide	Hydrochlorothiazide	298	96
Simvastatin	Simvastatin	243	73
Furosemide	Furosemide	240	67
Eliquis	Apixaban	238	50
Omeprazole	Omeprazole	190	49
Alprazolam	Alprazolam	189	56
Gabapentin	Gabapentin	188	44
Escitalopram Oxalate	Escitalopram Oxalate	184	47
Tamsulosin Hcl	Tamsulosin Hcl	154	48
Metoprolol Tartrate	Metoprolol Tartrate	153	37
Pantoprazole Sodium	Pantoprazole Sodium	146	51
Allopurinol	Allopurinol	129	38
Meloxicam	Meloxicam	117	33
Diclofenac Sodium	Diclofenac Sodium	107	35
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	100	29
Lorazepam	Lorazepam	95	20
Zolpidem Tartrate	Zolpidem Tartrate	86	18
Rosuvastatin Calcium	Rosuvastatin Calcium	83	31
Sertraline Hcl	Sertraline Hcl	82	21
Glimepiride	Glimepiride	79	23
Warfarin Sodium	Warfarin Sodium	76	21
Potassium Chloride	Potassium Chloride	75	18
Pravastatin Sodium	Pravastatin Sodium	74	22
Ramipril	Ramipril	74	20
Synthroid	Levothyroxine Sodium	74	17
Albuterol Sulfate Hfa	Albuterol Sulfate	72	28
Tramadol Hcl	Tramadol Hcl	72	22
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	65	18
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	65	20
Alendronate Sodium	Alendronate Sodium	63	18
Jardiance	Empagliflozin	63	15
Finasteride	Finasteride	62	17
Fluticasone Propionate	Fluticasone Propionate	58	23
Donepezil Hcl	Donepezil Hcl	56	12
Metformin Hcl Er	Metformin Hcl	52	16
Meclizine Hcl	Meclizine Hcl	50	15
Celecoxib	Celecoxib	47	13
Clopidogrel	Clopidogrel Bisulfate	45	14
Atenolol	Atenolol	44	14
Ezetimibe	Ezetimibe	44	15
Clonazepam	Clonazepam	43	suppressed
Januvia	Sitagliptin Phosphate	43	12
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	43	12
Duloxetine Hcl	Duloxetine Hcl	42	suppressed
Irbesartan	Irbesartan	42	suppressed
Prednisone	Prednisone	42	35
Xarelto	Rivaroxaban	42	suppressed
Azithromycin	Azithromycin	41	34
Glipizide Er	Glipizide	36	suppressed
Azelastine Hcl	Azelastine Hcl	35	suppressed
Benazepril Hcl	Benazepril Hcl	33	suppressed
Citalopram Hbr	Citalopram Hydrobromide	33	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	32	suppressed
Trazodone Hcl	Trazodone Hcl	32	13
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	30	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	29	28
Pregabalin	Pregabalin	29	suppressed
Montelukast Sodium	Montelukast Sodium	28	suppressed
Spironolactone	Spironolactone	27	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	27	12
Valsartan	Valsartan	27	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	26	15
Carvedilol	Carvedilol	25	suppressed
Myrbetriq	Mirabegron	25	suppressed
Ozempic	Semaglutide	25	suppressed
Ventolin Hfa	Albuterol Sulfate	25	suppressed
Glipizide	Glipizide	24	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	24	suppressed
Tizanidine Hcl	Tizanidine Hcl	24	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	23	12
Enalapril Maleate	Enalapril Maleate	23	suppressed
Nebivolol Hcl	Nebivolol Hcl	23	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	22	17
Hydralazine Hcl	Hydralazine Hcl	21	suppressed
Ondansetron Odt	Ondansetron	21	suppressed
Indapamide	Indapamide	20	suppressed
Solifenacin Succinate	Solifenacin Succinate	20	suppressed
Alfuzosin Hcl Er	Alfuzosin Hcl	19	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	19	15
Famotidine	Famotidine	19	suppressed
Lamotrigine	Lamotrigine	19	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	19	17
Bupropion Xl	Bupropion Hcl	18	suppressed
Naproxen	Naproxen	18	suppressed
Entresto	Sacubitril/Valsartan	17	suppressed
Lovastatin	Lovastatin	17	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	17	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	17	suppressed
Mounjaro	Tirzepatide	16	suppressed
Toujeo Solostar	Insulin Glargine,hum.Rec.Anlog	16	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	15	suppressed
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	15	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	15	suppressed
Nifedipine Er	Nifedipine	15	suppressed
Clonidine Hcl	Clonidine Hcl	14	suppressed
Colchicine	Colchicine	14	suppressed
Latanoprost	Latanoprost	14	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	14	suppressed
Ropinirole Hcl	Ropinirole Hcl	14	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	13	suppressed
Klor-Con M20	Potassium Chloride	13	suppressed
Memantine Hcl	Memantine Hcl	13	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	13	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	13	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	13	suppressed
Breo Ellipta	Fluticasone/Vilanterol	12	suppressed
Cephalexin	Cephalexin	12	suppressed
Labetalol Hcl	Labetalol Hcl	12	suppressed
Lamictal	Lamotrigine	12	suppressed
Methylprednisolone	Methylprednisolone	12	12
Oxybutynin Chloride Er	Oxybutynin Chloride	12	suppressed
Fosinopril Sodium	Fosinopril Sodium	11	suppressed
Ipratropium Bromide	Ipratropium Bromide	11	suppressed
Methocarbamol	Methocarbamol	11	suppressed
Metolazone	Metolazone	11	suppressed
Raloxifene Hcl	Raloxifene 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