Healthcare provider profile · identity verified

Thomas Vernon Chambliss, M.D.

Internal Medicine · GREENVILLE, SC · NPI 1578586202

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	715	206
Levothyroxine Sodium	Levothyroxine Sodium	346	93
Losartan Potassium	Losartan Potassium	308	91
Amlodipine Besylate	Amlodipine Besylate	292	81
Pantoprazole Sodium	Pantoprazole Sodium	275	85
Hydrochlorothiazide	Hydrochlorothiazide	200	59
Omeprazole	Omeprazole	196	57
Lisinopril	Lisinopril	183	59
Metoprolol Succinate	Metoprolol Succinate	182	52
Montelukast Sodium	Montelukast Sodium	177	48
Zolpidem Tartrate	Zolpidem Tartrate	175	32
Escitalopram Oxalate	Escitalopram Oxalate	169	41
Simvastatin	Simvastatin	164	43
Rosuvastatin Calcium	Rosuvastatin Calcium	135	43
Lorazepam	Lorazepam	134	32
Eliquis	Apixaban	131	30
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	119	31
Tamsulosin Hcl	Tamsulosin Hcl	119	41
Duloxetine Hcl	Duloxetine Hcl	108	28
Metformin Hcl Er	Metformin Hcl	106	29
Ezetimibe	Ezetimibe	102	33
Tramadol Hcl	Tramadol Hcl	102	20
Trazodone Hcl	Trazodone Hcl	101	29
Allopurinol	Allopurinol	99	23
Sertraline Hcl	Sertraline Hcl	98	27
Meloxicam	Meloxicam	96	34
Finasteride	Finasteride	93	32
Metformin Hcl	Metformin Hcl	88	22
Gabapentin	Gabapentin	86	29
Synthroid	Levothyroxine Sodium	78	20
Fluticasone Propionate	Fluticasone Propionate	76	35
Metoprolol Tartrate	Metoprolol Tartrate	76	22
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	72	22
Ozempic	Semaglutide	68	suppressed
Alprazolam	Alprazolam	63	12
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	62	55
Olmesartan Medoxomil	Olmesartan Medoxomil	59	suppressed
Citalopram Hbr	Citalopram Hydrobromide	57	15
Pravastatin Sodium	Pravastatin Sodium	57	16
Jardiance	Empagliflozin	56	18
Glipizide Er	Glipizide	55	16
Famotidine	Famotidine	54	16
Albuterol Sulfate Hfa	Albuterol Sulfate	53	33
Celecoxib	Celecoxib	52	15
Clonazepam	Clonazepam	51	11
Amitriptyline Hcl	Amitriptyline Hcl	49	16
Bupropion Xl	Bupropion Hcl	49	17
Clopidogrel	Clopidogrel Bisulfate	49	18
Carvedilol	Carvedilol	48	17
Donepezil Hcl	Donepezil Hcl	48	suppressed
Methylprednisolone	Methylprednisolone	47	47
Fenofibrate	Fenofibrate	46	12
Ipratropium Bromide	Ipratropium Bromide	46	suppressed
Propranolol Hcl	Propranolol Hcl	43	11
Xarelto	Rivaroxaban	43	suppressed
Potassium Chloride	Potassium Chloride	42	15
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	37	14
Atenolol	Atenolol	36	suppressed
Pregabalin	Pregabalin	36	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	33	31
Mirtazapine	Mirtazapine	33	suppressed
Prednisone	Prednisone	33	23
Memantine Hcl	Memantine Hcl	32	suppressed
Clonidine Hcl	Clonidine Hcl	31	suppressed
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	30	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	29	suppressed
Terazosin Hcl	Terazosin Hcl	28	suppressed
Paroxetine Hcl	Paroxetine Hcl	27	suppressed
Furosemide	Furosemide	26	suppressed
Azithromycin	Azithromycin	25	22
Fluoxetine Hcl	Fluoxetine Hcl	25	suppressed
Alendronate Sodium	Alendronate Sodium	24	11
Cephalexin	Cephalexin	24	17
Chlorthalidone	Chlorthalidone	24	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	24	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	23	suppressed
Divalproex Sodium	Divalproex Sodium	23	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	22	22
Warfarin Sodium	Warfarin Sodium	22	suppressed
Advair Hfa	Fluticasone Propion/Salmeterol	21	suppressed
Baclofen	Baclofen	21	suppressed
Benazepril Hcl	Benazepril Hcl	21	suppressed
Irbesartan	Irbesartan	21	suppressed
Temazepam	Temazepam	21	suppressed
Diclofenac Sodium	Diclofenac Sodium	20	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	20	suppressed
Fentanyl	Fentanyl	20	suppressed
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	20	suppressed
Tizanidine Hcl	Tizanidine Hcl	20	suppressed
Clonidine	Clonidine	19	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	18	suppressed
Zolpidem Tartrate Er	Zolpidem Tartrate	18	suppressed
Amoxicillin	Amoxicillin	17	suppressed
Glimepiride	Glimepiride	17	suppressed
Tolterodine Tartrate Er	Tolterodine Tartrate	17	suppressed
Bumetanide	Bumetanide	16	suppressed
Amlodipine-Valsartan	Amlodipine Besylate/Valsartan	15	suppressed
Budesonide-Formoterol Fumarate	Budesonide/Formoterol Fumarate	15	suppressed
Estradiol	Estradiol	15	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	15	suppressed
Torsemide	Torsemide	15	suppressed
Valsartan	Valsartan	15	suppressed
Fluconazole	Fluconazole	14	11
Minocycline Hcl	Minocycline Hcl	14	13
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	14	12
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	14	suppressed
Valacyclovir	Valacyclovir Hcl	14	12
Colchicine	Colchicine	13	suppressed
Lansoprazole	Lansoprazole	13	suppressed
Meclizine Hcl	Meclizine Hcl	13	suppressed
Ondansetron Odt	Ondansetron	13	12
Triamcinolone Acetonide	Triamcinolone Acetonide	13	11
Atomoxetine Hcl	Atomoxetine Hcl	12	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	12	suppressed
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	12	suppressed
Olmesartan-Hydrochlorothiazide	Olmesartan/Hydrochlorothiazide	12	suppressed
Testosterone	Testosterone	12	suppressed
Amiodarone Hcl	Amiodarone Hcl	11	suppressed
Armodafinil	Armodafinil	11	suppressed
Azelastine Hcl	Azelastine Hcl	11	suppressed
Testosterone Cypionate	Testosterone Cypionate	11	suppressed
Verapamil Er	Verapamil 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