Healthcare provider profile · identity verified

Thomas W. Porter, M.D.

Internal Medicine · PASADENA, TX · NPI 1235230574

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	112
Amlodipine Besylate	Amlodipine Besylate	306	62
Eliquis	Apixaban	270	26
Donepezil Hcl	Donepezil Hcl	231	24
Lisinopril	Lisinopril	230	46
Levothyroxine Sodium	Levothyroxine Sodium	227	34
Sertraline Hcl	Sertraline Hcl	224	28
Divalproex Sodium	Divalproex Sodium	218	30
Trazodone Hcl	Trazodone Hcl	213	23
Furosemide	Furosemide	188	30
Potassium Chloride	Potassium Chloride	181	31
Carvedilol	Carvedilol	178	26
Gabapentin	Gabapentin	165	26
Omeprazole	Omeprazole	149	25
Tamsulosin Hcl	Tamsulosin Hcl	143	28
Buspirone Hcl	Buspirone Hcl	138	20
Famotidine	Famotidine	135	23
Memantine Hcl	Memantine Hcl	130	18
Risperidone	Risperidone	129	15
Mirtazapine	Mirtazapine	124	22
Lactulose	Lactulose	123	25
Levetiracetam	Levetiracetam	118	suppressed
Losartan Potassium	Losartan Potassium	107	22
Metformin Hcl	Metformin Hcl	107	28
Pantoprazole Sodium	Pantoprazole Sodium	100	17
Metoprolol Succinate	Metoprolol Succinate	99	27
Clopidogrel	Clopidogrel Bisulfate	95	18
Hydralazine Hcl	Hydralazine Hcl	90	17
Metoprolol Tartrate	Metoprolol Tartrate	89	19
Finasteride	Finasteride	86	11
Quetiapine Fumarate	Quetiapine Fumarate	86	suppressed
Tradjenta	Linagliptin	83	11
Jardiance	Empagliflozin	82	17
Oxcarbazepine	Oxcarbazepine	73	suppressed
Benztropine Mesylate	Benztropine Mesylate	71	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	69	14
Duloxetine Hcl	Duloxetine Hcl	68	suppressed
Latanoprost	Latanoprost	68	suppressed
Olanzapine	Olanzapine	66	suppressed
Metformin Hcl Er	Metformin Hcl	63	16
Albuterol Sulfate	Albuterol Sulfate	60	14
Aripiprazole	Aripiprazole	59	suppressed
Escitalopram Oxalate	Escitalopram Oxalate	59	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	57	11
Fluoxetine Hcl	Fluoxetine Hcl	52	suppressed
Januvia	Sitagliptin Phosphate	51	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	51	suppressed
Haloperidol	Haloperidol	45	suppressed
Lorazepam	Lorazepam	45	16
Baclofen	Baclofen	44	suppressed
Amantadine	Amantadine Hcl	43	suppressed
Lamotrigine	Lamotrigine	43	suppressed
Valproic Acid	Valproic Acid (As Sodium Salt)	43	suppressed
Hydrochlorothiazide	Hydrochlorothiazide	42	suppressed
Fluticasone Propionate	Fluticasone Propionate	41	12
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	39	suppressed
Clonazepam	Clonazepam	38	suppressed
Divalproex Sodium Er	Divalproex Sodium	37	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	36	14
Prednisone	Prednisone	36	18
Nifedipine Er	Nifedipine	33	suppressed
Brimonidine Tartrate	Brimonidine Tartrate	32	suppressed
Bumetanide	Bumetanide	32	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	32	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	32	suppressed
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	31	13
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	30	19
Insulin Lispro Kwikpen U-100	Insulin Lispro	30	suppressed
Ketoconazole	Ketoconazole	30	suppressed
Ezetimibe	Ezetimibe	29	suppressed
Pravastatin Sodium	Pravastatin Sodium	29	suppressed
Tramadol Hcl	Tramadol Hcl	29	suppressed
Ozempic	Semaglutide	28	suppressed
Azithromycin	Azithromycin	27	20
Humalog	Insulin Lispro	27	suppressed
Budesonide	Budesonide	26	suppressed
Citalopram Hbr	Citalopram Hydrobromide	26	suppressed
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	26	suppressed
Simvastatin	Simvastatin	26	suppressed
Sucralfate	Sucralfate	26	suppressed
Albuterol Sulfate Hfa	Albuterol Sulfate	25	11
Medroxyprogesterone Acetate	Medroxyprogesterone Acetate	25	suppressed
Cephalexin	Cephalexin	24	17
Demeclocycline Hcl	Demeclocycline Hcl	24	suppressed
Permethrin	Permethrin	24	19
Amiodarone Hcl	Amiodarone Hcl	23	suppressed
Glipizide	Glipizide	23	suppressed
Lumigan	Bimatoprost	23	suppressed
Topiramate	Topiramate	22	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	21	suppressed
Hydrocortisone	Hydrocortisone	21	suppressed
Memantine Hcl Er	Memantine Hcl	21	suppressed
Midodrine Hcl	Midodrine Hcl	21	suppressed
Rivastigmine	Rivastigmine Tartrate	21	suppressed
Valsartan	Valsartan	21	suppressed
Humulin N Kwikpen	Insulin Nph Human Isophane	20	suppressed
Ingrezza	Valbenazine Tosylate	20	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	20	suppressed
Pregabalin	Pregabalin	20	suppressed
Incruse Ellipta	Umeclidinium Bromide	19	suppressed
Nuedexta	Dextromethorphan Hbr/Quinidine	19	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	18	suppressed
Ceftriaxone	Ceftriaxone Sodium	18	14
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	18	suppressed
Ondansetron Hcl	Ondansetron Hcl	18	14
Torsemide	Torsemide	18	suppressed
Levemir Flexpen	Insulin Detemir	17	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	17	15
Alendronate Sodium	Alendronate Sodium	16	suppressed
Humulin R	Insulin Regular, Human	16	suppressed
Myrbetriq	Mirabegron	16	suppressed
Simbrinza	Brinzolamide/Brimonidine Tart	16	suppressed
Sodium Chloride	0.9 % Sodium Chloride	16	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	16	12
Tolterodine Tartrate	Tolterodine Tartrate	16	suppressed
Insulin Aspart Flexpen	Insulin Aspart	15	suppressed
Scopolamine	Scopolamine	15	suppressed
Sevelamer Carbonate	Sevelamer Carbonate	15	suppressed
Farxiga	Dapagliflozin Propanediol	14	suppressed
Humalog Kwikpen U-100	Insulin Lispro	14	suppressed
Ibuprofen	Ibuprofen	14	suppressed
Lidocaine Hcl	Lidocaine Hcl	14	12
Pioglitazone Hcl	Pioglitazone Hcl	14	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	14	suppressed
Unifine Safecontrol Pen Needle	Pen Needle,dual Safety,diabetc	14	suppressed
Amoxicillin	Amoxicillin	13	12
Bupropion Hcl	Bupropion Hcl	13	suppressed
Glimepiride	Glimepiride	13	suppressed
Glucagon Emergency Kit	Glucagon	13	suppressed
Isosorbide Dinitrate	Isosorbide Dinitrate	13	suppressed
Naproxen	Naproxen	13	suppressed
Phenobarbital	Phenobarbital	13	suppressed
Prednisolone Acetate	Prednisolone Acetate	13	suppressed
Trulicity	Dulaglutide	13	suppressed
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	13	suppressed
Alprazolam	Alprazolam	12	suppressed
Azelastine Hcl	Azelastine Hcl	12	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	12	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	12	suppressed
Entresto	Sacubitril/Valsartan	12	suppressed
Fenofibrate	Fenofibrate	12	suppressed
Haloperidol Decanoate	Haloperidol Decanoate	12	suppressed
Paroxetine Hcl	Paroxetine Hcl	12	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	12	12
Phenytoin	Phenytoin	12	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	12	suppressed
Carbamazepine	Carbamazepine	11	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	11	suppressed
Cyproheptadine Hcl	Cyproheptadine Hcl	11	suppressed
Linzess	Linaclotide	11	suppressed
Nyamyc	Nystatin	11	suppressed
Pyridostigmine Bromide	Pyridostigmine Bromide	11	suppressed
Valproic Acid	Valproic Acid	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