Healthcare provider profile · identity verified

Larissa Ann Thomas, M.D.

Family Practice · LA GRANDE, OR · NPI 1720344393

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
Levothyroxine Sodium	Levothyroxine Sodium	336	72
Atorvastatin Calcium	Atorvastatin Calcium	287	72
Lisinopril	Lisinopril	245	56
Omeprazole	Omeprazole	163	41
Gabapentin	Gabapentin	162	32
Losartan Potassium	Losartan Potassium	159	45
Amlodipine Besylate	Amlodipine Besylate	154	47
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	135	22
Furosemide	Furosemide	134	30
Trazodone Hcl	Trazodone Hcl	127	20
Metoprolol Succinate	Metoprolol Succinate	124	29
Rosuvastatin Calcium	Rosuvastatin Calcium	108	22
Potassium Chloride	Potassium Chloride	106	24
Eliquis	Apixaban	94	18
Oxycodone Hcl	Oxycodone Hcl	94	17
Citalopram Hbr	Citalopram Hydrobromide	88	18
Sertraline Hcl	Sertraline Hcl	87	22
Metoprolol Tartrate	Metoprolol Tartrate	78	20
Albuterol Sulfate Hfa	Albuterol Sulfate	77	30
Duloxetine Hcl	Duloxetine Hcl	74	13
Tamsulosin Hcl	Tamsulosin Hcl	74	17
Fluticasone Propionate	Fluticasone Propionate	71	27
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	69	15
Alprazolam	Alprazolam	68	16
Famotidine	Famotidine	68	17
Pregabalin	Pregabalin	64	suppressed
Hydrochlorothiazide	Hydrochlorothiazide	62	15
Meloxicam	Meloxicam	62	15
Pantoprazole Sodium	Pantoprazole Sodium	62	12
Metformin Hcl	Metformin Hcl	60	18
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	59	18
Metformin Hcl Er	Metformin Hcl	56	suppressed
Estradiol	Estradiol	52	14
Lovastatin	Lovastatin	52	14
Buprenorphine Hcl	Buprenorphine Hcl	48	suppressed
Clonazepam	Clonazepam	48	suppressed
Allopurinol	Allopurinol	46	suppressed
Lorazepam	Lorazepam	46	suppressed
Tizanidine Hcl	Tizanidine Hcl	43	12
Escitalopram Oxalate	Escitalopram Oxalate	42	12
Spironolactone	Spironolactone	42	suppressed
Warfarin Sodium	Warfarin Sodium	42	suppressed
Prednisone	Prednisone	41	21
Lamotrigine	Lamotrigine	40	suppressed
Arnuity Ellipta	Fluticasone Furoate	39	suppressed
Baclofen	Baclofen	39	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	39	13
Methocarbamol	Methocarbamol	37	suppressed
Ezetimibe	Ezetimibe	36	suppressed
Torsemide	Torsemide	36	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	34	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	34	suppressed
Ozempic	Semaglutide	31	suppressed
Risperidone	Risperidone	30	suppressed
Jardiance	Empagliflozin	29	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	29	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	28	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	28	suppressed
Simvastatin	Simvastatin	27	suppressed
Donepezil Hcl	Donepezil Hcl	26	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	26	suppressed
Irbesartan	Irbesartan	26	suppressed
Breo Ellipta	Fluticasone/Vilanterol	25	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	25	suppressed
Montelukast Sodium	Montelukast Sodium	25	suppressed
Olanzapine	Olanzapine	25	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	24	suppressed
Aripiprazole	Aripiprazole	22	suppressed
Buspirone Hcl	Buspirone Hcl	22	suppressed
Spiriva Respimat	Tiotropium Bromide	22	suppressed
Levetiracetam	Levetiracetam	21	suppressed
Propranolol Hcl	Propranolol Hcl	21	suppressed
Synthroid	Levothyroxine Sodium	21	suppressed
Tramadol Hcl	Tramadol Hcl	21	suppressed
Glimepiride	Glimepiride	20	suppressed
Hydralazine Hcl	Hydralazine Hcl	20	suppressed
Nystatin	Nystatin	20	11
Alendronate Sodium	Alendronate Sodium	19	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	19	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	19	suppressed
Sucralfate	Sucralfate	19	suppressed
Clotrimazole	Clotrimazole	18	suppressed
Diltiazem 24hr Er	Diltiazem Hcl	18	suppressed
Finasteride	Finasteride	18	suppressed
Cephalexin	Cephalexin	17	16
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	17	suppressed
Mirtazapine	Mirtazapine	17	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	17	suppressed
Promethazine Hcl	Promethazine Hcl	17	suppressed
Trulicity	Dulaglutide	17	suppressed
Topiramate	Topiramate	16	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	16	12
Ventolin Hfa	Albuterol Sulfate	16	suppressed
Fluvoxamine Maleate	Fluvoxamine Maleate	15	suppressed
Incruse Ellipta	Umeclidinium Bromide	15	suppressed
Lactulose	Lactulose	15	suppressed
Metoclopramide Hcl	Metoclopramide Hcl	15	suppressed
Nitroglycerin	Nitroglycerin	15	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	14	11
Toujeo Solostar	Insulin Glargine,hum.Rec.Anlog	14	suppressed
Ultra-Fine Micro Pen Needle	Pen Needle, Diabetic	14	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	13	suppressed
Bupropion Hcl	Bupropion Hcl	13	suppressed
Celecoxib	Celecoxib	13	suppressed
Diclofenac Potassium	Diclofenac Potassium	13	suppressed
Diltiazem 12hr Er	Diltiazem Hcl	13	suppressed
Lithium Carbonate Er	Lithium Carbonate	13	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	13	suppressed
Oxycontin	Oxycodone Hcl	13	suppressed
Tamoxifen Citrate	Tamoxifen Citrate	13	suppressed
Temazepam	Temazepam	13	suppressed
Zidovudine	Zidovudine	13	suppressed
Ziprasidone Hcl	Ziprasidone Hcl	13	suppressed
Atrovent Hfa	Ipratropium Bromide	12	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	12	suppressed
Dextroamphetamine Sulfate	Dextroamphetamine Sulfate	12	suppressed
Diltiazem Hcl	Diltiazem Hcl	12	suppressed
Enalapril Maleate	Enalapril Maleate	12	suppressed
Memantine Hcl	Memantine Hcl	12	suppressed
Mupirocin	Mupirocin	12	suppressed
Paroxetine Hcl	Paroxetine Hcl	12	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	12	suppressed
Procto-Med Hc	Hydrocortisone	12	suppressed
Spiriva Handihaler	Tiotropium Bromide	12	suppressed
Zonisamide	Zonisamide	12	suppressed
Carvedilol	Carvedilol	11	suppressed
Dantrolene Sodium	Dantrolene Sodium	11	suppressed
Farxiga	Dapagliflozin Propanediol	11	suppressed
Mirabegron Er	Mirabegron	11	suppressed
Pravastatin Sodium	Pravastatin Sodium	11	suppressed
Terazosin Hcl	Terazosin Hcl	11	suppressed
Tolterodine Tartrate	Tolterodine Tartrate	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

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