Healthcare provider profile · identity verified

Katherine Thyssen, DO

Geriatric Medicine · RENO, NV · NPI 1790191955

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	531	168
Rosuvastatin Calcium	Rosuvastatin Calcium	506	170
Atorvastatin Calcium	Atorvastatin Calcium	491	178
Losartan Potassium	Losartan Potassium	355	134
Gabapentin	Gabapentin	330	140
Amlodipine Besylate	Amlodipine Besylate	305	106
Omeprazole	Omeprazole	287	111
Lisinopril	Lisinopril	273	94
Tamsulosin Hcl	Tamsulosin Hcl	186	69
Metformin Hcl	Metformin Hcl	163	62
Simvastatin	Simvastatin	150	51
Trazodone Hcl	Trazodone Hcl	149	60
Metoprolol Succinate	Metoprolol Succinate	142	53
Albuterol Sulfate Hfa	Albuterol Sulfate	139	59
Potassium Chloride	Potassium Chloride	139	58
Fluoxetine Hcl	Fluoxetine Hcl	135	38
Alendronate Sodium	Alendronate Sodium	131	32
Meloxicam	Meloxicam	122	56
Eliquis	Apixaban	121	39
Sertraline Hcl	Sertraline Hcl	121	39
Estradiol	Estradiol	108	55
Pantoprazole Sodium	Pantoprazole Sodium	107	42
Duloxetine Hcl	Duloxetine Hcl	105	38
Mounjaro	Tirzepatide	96	17
Carvedilol	Carvedilol	90	36
Hydrochlorothiazide	Hydrochlorothiazide	90	40
Xarelto	Rivaroxaban	90	28
Alprazolam	Alprazolam	85	36
Metoprolol Tartrate	Metoprolol Tartrate	85	33
Montelukast Sodium	Montelukast Sodium	83	29
Furosemide	Furosemide	80	41
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	80	18
Spironolactone	Spironolactone	79	25
Zolpidem Tartrate	Zolpidem Tartrate	75	28
Celecoxib	Celecoxib	74	33
Escitalopram Oxalate	Escitalopram Oxalate	70	30
Trulicity	Dulaglutide	69	15
Fluticasone Propionate	Fluticasone Propionate	63	25
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	63	12
Pravastatin Sodium	Pravastatin Sodium	59	19
Finasteride	Finasteride	56	22
Allopurinol	Allopurinol	55	21
Ezetimibe	Ezetimibe	53	21
Pioglitazone Hcl	Pioglitazone Hcl	53	16
Citalopram Hbr	Citalopram Hydrobromide	52	24
Metformin Hcl Er	Metformin Hcl	52	25
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	49	40
Triamcinolone Acetonide	Triamcinolone Acetonide	47	34
Torsemide	Torsemide	46	26
Tramadol Hcl	Tramadol Hcl	46	suppressed
Azithromycin	Azithromycin	45	41
Benazepril Hcl	Benazepril Hcl	45	16
Myrbetriq	Mirabegron	45	17
Ozempic	Semaglutide	45	14
Tizanidine Hcl	Tizanidine Hcl	45	16
Oxycodone Hcl	Oxycodone Hcl	43	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	41	15
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	41	18
Wixela Inhub	Fluticasone Propion/Salmeterol	41	17
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	40	19
Hydroxyzine Hcl	Hydroxyzine Hcl	40	17
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	39	15
Olmesartan Medoxomil	Olmesartan Medoxomil	39	11
Donepezil Hcl	Donepezil Hcl	38	suppressed
Lovastatin	Lovastatin	38	14
Buspirone Hcl	Buspirone Hcl	37	19
Ipratropium Bromide	Ipratropium Bromide	37	12
Prednisone	Prednisone	37	29
Acyclovir	Acyclovir	36	18
Bupropion Hcl	Bupropion Hcl	36	16
Colestipol Hcl	Colestipol Hcl	35	14
Famotidine	Famotidine	35	15
Farxiga	Dapagliflozin Propanediol	34	11
Jardiance	Empagliflozin	33	11
Clopidogrel	Clopidogrel Bisulfate	32	18
Nystatin	Nystatin	32	15
Pregabalin	Pregabalin	31	14
Clobetasol Propionate	Clobetasol Propionate	30	11
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	30	15
Doxazosin Mesylate	Doxazosin Mesylate	29	suppressed
Mirtazapine	Mirtazapine	29	15
Paxlovid	Nirmatrelvir/Ritonavir	28	26
Ondansetron Odt	Ondansetron	27	16
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	26	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	26	suppressed
Ropinirole Hcl	Ropinirole Hcl	26	suppressed
Azelastine Hcl	Azelastine Hcl	25	14
Baclofen	Baclofen	25	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	25	suppressed
Warfarin Sodium	Warfarin Sodium	25	suppressed
Glipizide	Glipizide	24	suppressed
Latanoprost	Latanoprost	24	suppressed
Toujeo Solostar	Insulin Glargine,hum.Rec.Anlog	24	suppressed
Bupropion Hcl Sr	Bupropion Hcl	23	suppressed
Midodrine Hcl	Midodrine Hcl	23	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	23	suppressed
Tresiba Flextouch U-100	Insulin Degludec	23	suppressed
Propranolol Hcl	Propranolol Hcl	22	17
Sotalol	Sotalol Hcl	22	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	22	17
Valsartan	Valsartan	22	suppressed
Bupropion Xl	Bupropion Hcl	20	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	20	19
Diazepam	Diazepam	19	suppressed
Methylprednisolone	Methylprednisolone	19	18
Oxybutynin Chloride Er	Oxybutynin Chloride	19	suppressed
Rybelsus	Semaglutide	19	11
Valacyclovir	Valacyclovir Hcl	19	suppressed
Chlorthalidone	Chlorthalidone	18	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	18	16
Lorazepam	Lorazepam	18	suppressed
Premarin	Estrogens, Conjugated	18	suppressed
Amiodarone Hcl	Amiodarone Hcl	17	suppressed
Atenolol	Atenolol	17	suppressed
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	17	suppressed
Sucralfate	Sucralfate	17	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	17	suppressed
Terazosin Hcl	Terazosin Hcl	16	suppressed
Amoxicillin	Amoxicillin	15	suppressed
Ibuprofen	Ibuprofen	15	suppressed
Irbesartan	Irbesartan	15	suppressed
Ketoconazole	Ketoconazole	15	suppressed
Topiramate	Topiramate	15	suppressed
Verapamil Er	Verapamil Hcl	15	suppressed
Armour Thyroid	Thyroid,pork	14	suppressed
Cefdinir	Cefdinir	14	11
Clonazepam	Clonazepam	14	suppressed
Minoxidil	Minoxidil	14	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	14	suppressed
Nifedipine Er	Nifedipine	14	suppressed
Fluconazole	Fluconazole	13	11
Hydralazine Hcl	Hydralazine Hcl	13	suppressed
Lactulose	Lactulose	13	suppressed
Novolog Flexpen	Insulin Aspart	13	suppressed
Repatha Sureclick	Evolocumab	13	suppressed
Anastrozole	Anastrozole	11	suppressed
Lansoprazole	Lansoprazole	11	suppressed
Meclizine Hcl	Meclizine 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