Healthcare provider profile · identity verified

Gregory Albert Parkin, MD

Internal Medicine · SALT LAKE CITY, UT · NPI 1154360691

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	589	181
Rosuvastatin Calcium	Rosuvastatin Calcium	400	121
Levothyroxine Sodium	Levothyroxine Sodium	345	100
Omeprazole	Omeprazole	291	101
Losartan Potassium	Losartan Potassium	271	88
Zolpidem Tartrate	Zolpidem Tartrate	219	48
Metoprolol Succinate	Metoprolol Succinate	211	64
Lisinopril	Lisinopril	199	69
Potassium Chloride	Potassium Chloride	189	57
Eliquis	Apixaban	187	45
Metformin Hcl Er	Metformin Hcl	187	58
Tamsulosin Hcl	Tamsulosin Hcl	179	61
Amlodipine Besylate	Amlodipine Besylate	168	56
Trazodone Hcl	Trazodone Hcl	161	43
Gabapentin	Gabapentin	160	52
Simvastatin	Simvastatin	147	47
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	146	36
Fluoxetine Hcl	Fluoxetine Hcl	145	34
Alendronate Sodium	Alendronate Sodium	142	53
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	142	42
Escitalopram Oxalate	Escitalopram Oxalate	130	45
Tramadol Hcl	Tramadol Hcl	128	28
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	123	40
Finasteride	Finasteride	117	43
Furosemide	Furosemide	111	45
Pantoprazole Sodium	Pantoprazole Sodium	103	36
Sertraline Hcl	Sertraline Hcl	89	27
Pravastatin Sodium	Pravastatin Sodium	85	31
Olmesartan Medoxomil	Olmesartan Medoxomil	78	29
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	76	24
Alprazolam	Alprazolam	75	16
Allopurinol	Allopurinol	72	23
Ibuprofen	Ibuprofen	72	27
Jardiance	Empagliflozin	72	21
Metformin Hcl	Metformin Hcl	72	27
Carvedilol	Carvedilol	71	23
Hydrochlorothiazide	Hydrochlorothiazide	67	26
Spironolactone	Spironolactone	66	25
Glimepiride	Glimepiride	64	22
Celecoxib	Celecoxib	63	24
Clonazepam	Clonazepam	61	12
Fluticasone Propionate	Fluticasone Propionate	59	25
Clopidogrel	Clopidogrel Bisulfate	54	19
Sodium Chloride	0.9 % Sodium Chloride	53	suppressed
Citalopram Hbr	Citalopram Hydrobromide	49	16
Lorazepam	Lorazepam	48	11
Triamcinolone Acetonide	Triamcinolone Acetonide	47	28
Ropinirole Hcl	Ropinirole Hcl	44	14
Sumatriptan Succinate	Sumatriptan Succinate	44	suppressed
Bupropion Xl	Bupropion Hcl	43	17
Montelukast Sodium	Montelukast Sodium	43	16
Albuterol Sulfate Hfa	Albuterol Sulfate	42	26
Oxycodone Hcl	Oxycodone Hcl	42	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	39	14
Oxybutynin Chloride Er	Oxybutynin Chloride	38	12
Trulicity	Dulaglutide	38	suppressed
Donepezil Hcl	Donepezil Hcl	36	14
Mounjaro	Tirzepatide	35	suppressed
Temazepam	Temazepam	35	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	34	11
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	32	suppressed
Myrbetriq	Mirabegron	32	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	31	14
Ezetimibe	Ezetimibe	31	11
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	31	12
Pregabalin	Pregabalin	30	suppressed
Diclofenac Sodium	Diclofenac Sodium	29	13
Duloxetine Hcl	Duloxetine Hcl	29	12
Famotidine	Famotidine	29	11
Irbesartan	Irbesartan	29	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	28	suppressed
Diazepam	Diazepam	28	suppressed
Metoprolol Tartrate	Metoprolol Tartrate	28	suppressed
Lamotrigine	Lamotrigine	27	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	27	suppressed
Meloxicam	Meloxicam	27	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	27	suppressed
Rizatriptan	Rizatriptan Benzoate	27	suppressed
Memantine Hcl	Memantine Hcl	24	suppressed
Morphine Sulfate Er	Morphine Sulfate	24	suppressed
Synthroid	Levothyroxine Sodium	24	suppressed
Farxiga	Dapagliflozin Propanediol	23	11
Ondansetron Hcl	Ondansetron Hcl	23	suppressed
Prednisone	Prednisone	23	11
Tizanidine Hcl	Tizanidine Hcl	23	suppressed
Estradiol	Estradiol	22	11
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	22	17
Ozempic	Semaglutide	22	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	22	suppressed
Cephalexin	Cephalexin	21	17
Testosterone Cypionate	Testosterone Cypionate	21	suppressed
Bupropion Hcl Sr	Bupropion Hcl	19	suppressed
Glipizide Er	Glipizide	19	suppressed
Solifenacin Succinate	Solifenacin Succinate	19	12
Doxycycline Monohydrate	Doxycycline Monohydrate	18	12
Olmesartan-Hydrochlorothiazide	Olmesartan/Hydrochlorothiazide	18	suppressed
Procto-Med Hc	Hydrocortisone	18	suppressed
Cholestyramine	Cholestyramine (With Sugar)	17	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	17	suppressed
Lansoprazole	Lansoprazole	16	suppressed
Paroxetine Hcl	Paroxetine Hcl	16	suppressed
Propranolol Hcl	Propranolol Hcl	16	11
Ciprofloxacin Hcl	Ciprofloxacin Hcl	15	14
Humalog Kwikpen U-100	Insulin Lispro	15	suppressed
Imipramine Hcl	Imipramine Hcl	15	suppressed
Novolog Flexpen	Insulin Aspart	15	suppressed
Sucralfate	Sucralfate	15	suppressed
Acyclovir	Acyclovir	14	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	14	11
Benazepril Hcl	Benazepril Hcl	14	suppressed
Fenofibrate	Fenofibrate	14	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	14	suppressed
Verapamil Er	Verapamil Hcl	14	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	13	suppressed
Valsartan	Valsartan	13	suppressed
Budesonide-Formoterol Fumarate	Budesonide/Formoterol Fumarate	12	suppressed
Dayvigo	Lemborexant	12	suppressed
Potassium Citrate Er	Potassium Citrate	12	suppressed
Topiramate	Topiramate	12	suppressed
Clindamycin Phosphate	Clindamycin Phosphate	11	suppressed
Eszopiclone	Eszopiclone	11	suppressed
Flecainide Acetate	Flecainide Acetate	11	suppressed
Mirtazapine	Mirtazapine	11	suppressed
Naproxen	Naproxen	11	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	11	suppressed
Symbicort	Budesonide/Formoterol 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