Healthcare provider profile · identity verified

Gregory D. Krol, M.D.FACP

Internal Medicine · STERLING HEIGHTS, MI · NPI 1548338098

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	677	184
Losartan Potassium	Losartan Potassium	548	155
Amlodipine Besylate	Amlodipine Besylate	360	106
Levothyroxine Sodium	Levothyroxine Sodium	315	77
Metoprolol Succinate	Metoprolol Succinate	315	86
Omeprazole	Omeprazole	272	84
Eliquis	Apixaban	260	73
Metformin Hcl	Metformin Hcl	224	60
Lisinopril	Lisinopril	218	61
Rosuvastatin Calcium	Rosuvastatin Calcium	212	60
Gabapentin	Gabapentin	175	48
Simvastatin	Simvastatin	173	50
Jardiance	Empagliflozin	150	48
Alprazolam	Alprazolam	132	45
Pantoprazole Sodium	Pantoprazole Sodium	132	44
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	125	32
Escitalopram Oxalate	Escitalopram Oxalate	122	29
Allopurinol	Allopurinol	113	29
Hydrochlorothiazide	Hydrochlorothiazide	113	31
Tamsulosin Hcl	Tamsulosin Hcl	113	34
Famotidine	Famotidine	108	32
Nifedipine Er	Nifedipine	108	27
Potassium Chloride	Potassium Chloride	100	33
Pravastatin Sodium	Pravastatin Sodium	96	28
Metoprolol Tartrate	Metoprolol Tartrate	78	27
Ozempic	Semaglutide	78	13
Alendronate Sodium	Alendronate Sodium	76	23
Furosemide	Furosemide	76	31
Oxycodone Hcl	Oxycodone Hcl	74	11
Spironolactone	Spironolactone	74	27
Clopidogrel	Clopidogrel Bisulfate	70	21
Montelukast Sodium	Montelukast Sodium	68	15
Carvedilol	Carvedilol	66	20
Fluticasone Propionate	Fluticasone Propionate	66	38
Metformin Hcl Er	Metformin Hcl	66	20
Duloxetine Hcl	Duloxetine Hcl	65	21
Sertraline Hcl	Sertraline Hcl	61	16
Methocarbamol	Methocarbamol	56	12
Abrysvo	Rsv Vacc, Pref A And Pref B/Pf	54	53
Tramadol Hcl	Tramadol Hcl	53	13
Donepezil Hcl	Donepezil Hcl	48	12
Benazepril Hcl	Benazepril Hcl	47	16
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	46	18
Xarelto	Rivaroxaban	46	11
Finasteride	Finasteride	44	14
Lorazepam	Lorazepam	44	12
Trazodone Hcl	Trazodone Hcl	44	12
Albuterol Sulfate Hfa	Albuterol Sulfate	43	18
Atenolol	Atenolol	43	14
Citalopram Hbr	Citalopram Hydrobromide	42	11
Meloxicam	Meloxicam	42	23
Pregabalin	Pregabalin	42	11
Ventolin Hfa	Albuterol Sulfate	42	13
Torsemide	Torsemide	40	11
Chlorthalidone	Chlorthalidone	38	12
Ibuprofen	Ibuprofen	36	16
Trulicity	Dulaglutide	36	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	36	suppressed
Ipratropium Bromide	Ipratropium Bromide	34	18
Spiriva Respimat	Tiotropium Bromide	34	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	33	suppressed
Clonazepam	Clonazepam	32	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	31	21
Nitroglycerin	Nitroglycerin	31	22
Spironolactone-Hctz	Spironolact/Hydrochlorothiazid	30	suppressed
Warfarin Sodium	Warfarin Sodium	30	suppressed
Glipizide	Glipizide	29	suppressed
Tradjenta	Linagliptin	28	suppressed
Levetiracetam	Levetiracetam	27	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	25	suppressed
Januvia	Sitagliptin Phosphate	24	suppressed
Klor-Con M20	Potassium Chloride	24	suppressed
Paroxetine Hcl	Paroxetine Hcl	24	suppressed
Flecainide Acetate	Flecainide Acetate	23	suppressed
Lactulose	Lactulose	22	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	21	suppressed
Amiodarone Hcl	Amiodarone Hcl	20	suppressed
Diazepam	Diazepam	20	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	20	suppressed
Midodrine Hcl	Midodrine Hcl	20	suppressed
Amiloride-Hydrochlorothiazide	Amiloride/Hydrochlorothiazide	19	suppressed
Aripiprazole	Aripiprazole	19	suppressed
Boostrix Tdap	Diphth,pertuss(Acell),tet Vac	19	19
Calcitriol	Calcitriol	19	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	19	11
Alfuzosin Hcl Er	Alfuzosin Hcl	18	suppressed
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	18	suppressed
Colchicine	Colchicine	18	13
Ezetimibe	Ezetimibe	18	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	18	suppressed
Propranolol Hcl	Propranolol Hcl	18	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	18	suppressed
Cilostazol	Cilostazol	17	suppressed
Novolog Flexpen	Insulin Aspart	17	suppressed
Synthroid	Levothyroxine Sodium	17	suppressed
Terazosin Hcl	Terazosin Hcl	17	suppressed
Zolpidem Tartrate Er	Zolpidem Tartrate	17	suppressed
Buprenorphine-Naloxone	Buprenorphine Hcl/Naloxone Hcl	16	suppressed
Bupropion Hcl	Bupropion Hcl	16	suppressed
Lamotrigine	Lamotrigine	16	suppressed
Mounjaro	Tirzepatide	16	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	16	suppressed
Prednisone	Prednisone	16	11
Shingrix	Varicella-Zoster Ge/As01b/Pf	16	13
Bupropion Xl	Bupropion Hcl	15	suppressed
Entresto	Sacubitril/Valsartan	15	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	15	suppressed
Ketoconazole	Ketoconazole	15	suppressed
Pulmicort Flexhaler	Budesonide	15	suppressed
Tolterodine Tartrate Er	Tolterodine Tartrate	15	suppressed
Verapamil Er	Verapamil Hcl	15	suppressed
Bumetanide	Bumetanide	14	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	14	suppressed
Humalog Kwikpen U-100	Insulin Lispro	14	suppressed
Propranolol Hcl Er	Propranolol Hcl	14	suppressed
Ramipril	Ramipril	14	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	13	suppressed
Amoxicillin	Amoxicillin	13	11
Budesonide Dr	Budesonide	13	suppressed
Eplerenone	Eplerenone	13	suppressed
Meclizine Hcl	Meclizine Hcl	13	suppressed
Metronidazole	Metronidazole	13	suppressed
Ondansetron Hcl	Ondansetron Hcl	13	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	13	suppressed
Rivastigmine	Rivastigmine Tartrate	13	suppressed
Bupropion Hcl Sr	Bupropion Hcl	12	suppressed
Buspirone Hcl	Buspirone Hcl	12	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	12	suppressed
Hydralazine Hcl	Hydralazine Hcl	12	suppressed
Hydromorphone Hcl	Hydromorphone Hcl	12	suppressed
Imipramine Hcl	Imipramine Hcl	12	suppressed
Lamotrigine Er	Lamotrigine	12	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	12	suppressed
Oxycontin	Oxycodone Hcl	12	suppressed
Potassium Citrate Er	Potassium Citrate	12	suppressed
Rivastigmine	Rivastigmine	12	suppressed
Ammonium Lactate	Ammonium Lactate	11	suppressed
Clonidine Hcl	Clonidine 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