Healthcare provider profile · identity verified

John M. Guenst, M.D.

Internal Medicine · NASHVILLE, TN · NPI 1063452902

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	806	222
Amlodipine Besylate	Amlodipine Besylate	486	142
Rosuvastatin Calcium	Rosuvastatin Calcium	388	110
Valsartan	Valsartan	336	94
Metoprolol Succinate	Metoprolol Succinate	333	96
Levothyroxine Sodium	Levothyroxine Sodium	284	70
Losartan Potassium	Losartan Potassium	251	73
Famotidine	Famotidine	246	75
Chlorthalidone	Chlorthalidone	179	65
Lisinopril	Lisinopril	177	55
Gabapentin	Gabapentin	163	34
Prednisone	Prednisone	160	91
Metformin Hcl Er	Metformin Hcl	158	51
Pantoprazole Sodium	Pantoprazole Sodium	149	43
Omeprazole	Omeprazole	148	42
Hydrochlorothiazide	Hydrochlorothiazide	145	48
Furosemide	Furosemide	134	41
Tamsulosin Hcl	Tamsulosin Hcl	131	38
Alprazolam	Alprazolam	126	16
Trazodone Hcl	Trazodone Hcl	125	36
Spironolactone	Spironolactone	124	41
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	122	20
Escitalopram Oxalate	Escitalopram Oxalate	114	35
Atenolol	Atenolol	113	30
Ezetimibe	Ezetimibe	108	39
Memantine Hcl	Memantine Hcl	105	28
Tramadol Hcl	Tramadol Hcl	101	27
Abrysvo	Rsv Vacc, Pref A And Pref B/Pf	81	81
Albuterol Sulfate Hfa	Albuterol Sulfate	76	33
Duloxetine Hcl	Duloxetine Hcl	75	28
Farxiga	Dapagliflozin Propanediol	75	16
Carvedilol	Carvedilol	74	24
Clopidogrel	Clopidogrel Bisulfate	67	17
Ozempic	Semaglutide	65	13
Potassium Chloride	Potassium Chloride	62	20
Pravastatin Sodium	Pravastatin Sodium	62	19
Montelukast Sodium	Montelukast Sodium	60	18
Clonidine Hcl	Clonidine Hcl	58	20
Sertraline Hcl	Sertraline Hcl	57	15
Donepezil Hcl	Donepezil Hcl	56	21
Allopurinol	Allopurinol	54	17
Metformin Hcl	Metformin Hcl	54	18
Doxazosin Mesylate	Doxazosin Mesylate	53	15
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	51	42
Clonazepam	Clonazepam	51	suppressed
Xarelto	Rivaroxaban	51	suppressed
Lorazepam	Lorazepam	50	suppressed
Oxycodone Hcl	Oxycodone Hcl	50	suppressed
Repatha Sureclick	Evolocumab	49	12
Zolpidem Tartrate	Zolpidem Tartrate	49	15
Adacel Tdap	Diph,pertuss(Acell),tet Vac/Pf	46	46
Metoprolol Tartrate	Metoprolol Tartrate	45	14
Quetiapine Fumarate	Quetiapine Fumarate	45	15
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	43	suppressed
Azithromycin	Azithromycin	40	30
Bupropion Xl	Bupropion Hcl	39	13
Fluticasone Propionate	Fluticasone Propionate	39	16
Citalopram Hbr	Citalopram Hydrobromide	38	suppressed
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	38	11
Esomeprazole Magnesium	Esomeprazole Magnesium	37	suppressed
Morphine Sulfate Er	Morphine Sulfate	37	suppressed
Torsemide	Torsemide	37	suppressed
Eliquis	Apixaban	36	11
Paxlovid	Nirmatrelvir/Ritonavir	35	34
Diazepam	Diazepam	33	suppressed
Amoxicillin	Amoxicillin	32	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	30	suppressed
Pregabalin	Pregabalin	27	suppressed
Hydrocortisone	Hydrocortisone	26	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	26	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	26	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	25	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	25	suppressed
Hydralazine Hcl	Hydralazine Hcl	25	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	25	suppressed
Tizanidine Hcl	Tizanidine Hcl	25	suppressed
Topiramate	Topiramate	25	suppressed
Breo Ellipta	Fluticasone/Vilanterol	23	suppressed
Glipizide	Glipizide	23	suppressed
Jardiance	Empagliflozin	23	suppressed
Ketoconazole	Ketoconazole	23	suppressed
Mirtazapine	Mirtazapine	23	suppressed
Shingrix	Varicella-Zoster Ge/As01b/Pf	23	19
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	23	21
Synthroid	Levothyroxine Sodium	23	suppressed
Fluconazole	Fluconazole	22	13
Ipratropium Bromide	Ipratropium Bromide	22	11
Pioglitazone Hcl	Pioglitazone Hcl	22	suppressed
Premarin	Estrogens, Conjugated	22	suppressed
Buspirone Hcl	Buspirone Hcl	21	suppressed
Glimepiride	Glimepiride	20	suppressed
Alfuzosin Hcl Er	Alfuzosin Hcl	19	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	19	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	19	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	19	suppressed
Januvia	Sitagliptin Phosphate	19	suppressed
Meloxicam	Meloxicam	18	suppressed
Ibandronate Sodium	Ibandronate Sodium	17	suppressed
Lansoprazole	Lansoprazole	17	suppressed
Mupirocin	Mupirocin	17	11
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	16	12
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	16	suppressed
Rizatriptan	Rizatriptan Benzoate	16	suppressed
Temazepam	Temazepam	16	suppressed
Valacyclovir	Valacyclovir Hcl	16	suppressed
Verapamil Er	Verapamil Hcl	16	suppressed
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	15	suppressed
Mounjaro	Tirzepatide	15	suppressed
Nadolol	Nadolol	15	suppressed
Candesartan Cilexetil	Candesartan Cilexetil	14	suppressed
Irbesartan	Irbesartan	14	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	14	suppressed
Linzess	Linaclotide	14	suppressed
Finasteride	Finasteride	13	suppressed
Ondansetron Hcl	Ondansetron Hcl	13	suppressed
Telmisartan	Telmisartan	13	suppressed
Toprol Xl	Metoprolol Succinate	13	suppressed
Ventolin Hfa	Albuterol Sulfate	13	suppressed
Dabigatran Etexilate	Dabigatran Etexilate Mesylate	12	suppressed
Estradiol	Estradiol	12	suppressed
Havrix	Hepatitis A Virus Vaccine/Pf	12	11
Levemir	Insulin Detemir	12	suppressed
Nifedipine Er	Nifedipine	12	suppressed
Olanzapine	Olanzapine	12	suppressed
Prazosin Hcl	Prazosin Hcl	12	suppressed
Promethazine Hcl	Promethazine Hcl	12	suppressed
Ranolazine Er	Ranolazine	12	suppressed
Benazepril Hcl	Benazepril Hcl	11	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	11	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	11	suppressed
Minoxidil	Minoxidil	11	suppressed
Nebivolol Hcl	Nebivolol Hcl	11	suppressed
Tresiba Flextouch U-100	Insulin Degludec	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