Healthcare provider profile · identity verified

Markus H.A. Opel, M.D.

Internal Medicine · GRANTS PASS, OR · NPI 1255336046

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
Losartan Potassium	Losartan Potassium	442	132
Metoprolol Succinate	Metoprolol Succinate	441	136
Amlodipine Besylate	Amlodipine Besylate	338	102
Atorvastatin Calcium	Atorvastatin Calcium	318	98
Lisinopril	Lisinopril	299	102
Levothyroxine Sodium	Levothyroxine Sodium	295	96
Omeprazole	Omeprazole	269	95
Hydrochlorothiazide	Hydrochlorothiazide	247	90
Gabapentin	Gabapentin	235	69
Rosuvastatin Calcium	Rosuvastatin Calcium	224	79
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	211	48
Potassium Chloride	Potassium Chloride	169	63
Tamsulosin Hcl	Tamsulosin Hcl	159	50
Citalopram Hbr	Citalopram Hydrobromide	144	35
Alendronate Sodium	Alendronate Sodium	142	41
Eliquis	Apixaban	140	38
Furosemide	Furosemide	140	56
Prednisone	Prednisone	120	64
Spironolactone	Spironolactone	111	32
Zolpidem Tartrate	Zolpidem Tartrate	103	22
Alprazolam	Alprazolam	102	19
Metformin Hcl	Metformin Hcl	98	32
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	94	18
Xarelto	Rivaroxaban	93	19
Celecoxib	Celecoxib	87	35
Warfarin Sodium	Warfarin Sodium	84	27
Allopurinol	Allopurinol	80	25
Albuterol Sulfate Hfa	Albuterol Sulfate	79	33
Clopidogrel	Clopidogrel Bisulfate	79	22
Buspirone Hcl	Buspirone Hcl	75	15
Fluticasone Propionate	Fluticasone Propionate	74	34
Ozempic	Semaglutide	74	11
Pantoprazole Sodium	Pantoprazole Sodium	74	25
Lorazepam	Lorazepam	69	15
Trazodone Hcl	Trazodone Hcl	66	26
Quetiapine Fumarate	Quetiapine Fumarate	63	suppressed
Methadone Hcl	Methadone Hcl	61	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	55	19
Glipizide	Glipizide	54	18
Montelukast Sodium	Montelukast Sodium	51	12
Tramadol Hcl	Tramadol Hcl	51	18
Simvastatin	Simvastatin	50	17
Famotidine	Famotidine	49	14
Oxycodone Hcl	Oxycodone Hcl	48	14
Paroxetine Hcl	Paroxetine Hcl	46	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	44	12
Carvedilol	Carvedilol	43	20
Ropinirole Hcl	Ropinirole Hcl	42	12
Sertraline Hcl	Sertraline Hcl	41	12
Temazepam	Temazepam	41	suppressed
Finasteride	Finasteride	40	14
Oxybutynin Chloride Er	Oxybutynin Chloride	39	suppressed
Mirtazapine	Mirtazapine	38	suppressed
Bupropion Xl	Bupropion Hcl	35	11
Morphine Sulfate Er	Morphine Sulfate	35	suppressed
Lovastatin	Lovastatin	34	13
Verapamil Er	Verapamil Hcl	34	suppressed
Dexamethasone	Dexamethasone	32	26
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	30	suppressed
Donepezil Hcl	Donepezil Hcl	30	suppressed
Escitalopram Oxalate	Escitalopram Oxalate	30	12
Synthroid	Levothyroxine Sodium	29	suppressed
Metformin Hcl Er	Metformin Hcl	28	14
Oxybutynin Chloride	Oxybutynin Chloride	28	suppressed
Propranolol Hcl	Propranolol Hcl	28	suppressed
Diazepam	Diazepam	27	suppressed
Ondansetron Hcl	Ondansetron Hcl	27	15
Metoprolol Tartrate	Metoprolol Tartrate	26	12
Acyclovir	Acyclovir	25	11
Clonidine Hcl	Clonidine Hcl	25	suppressed
Ibuprofen	Ibuprofen	25	11
Venlafaxine Hcl Er	Venlafaxine Hcl	25	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	24	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	24	suppressed
Torsemide	Torsemide	24	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	24	suppressed
Ibandronate Sodium	Ibandronate Sodium	23	suppressed
Clonazepam	Clonazepam	22	suppressed
Estradiol	Estradiol	22	suppressed
Digoxin	Digoxin	21	suppressed
Ezetimibe	Ezetimibe	21	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	21	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	21	16
Latanoprost	Latanoprost	19	suppressed
Levetiracetam	Levetiracetam	19	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	19	suppressed
Pregabalin	Pregabalin	19	suppressed
Ventolin Hfa	Albuterol Sulfate	19	suppressed
Duloxetine Hcl	Duloxetine Hcl	18	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	17	13
Metronidazole	Metronidazole	17	16
Pravastatin Sodium	Pravastatin Sodium	17	suppressed
Atenolol	Atenolol	15	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	15	12
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	15	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	15	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	15	suppressed
Sutab	Sod Sulf/Pot Chloride/Mag Sulf	15	15
Trospium Chloride	Trospium Chloride	15	suppressed
Lactulose	Lactulose	14	suppressed
Valacyclovir	Valacyclovir Hcl	14	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	13	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	13	suppressed
Fluticasone-Salmeterol Hfa	Fluticasone Propion/Salmeterol	13	suppressed
Trintellix	Vortioxetine Hydrobromide	13	suppressed
Advair Hfa	Fluticasone Propion/Salmeterol	12	suppressed
Anastrozole	Anastrozole	12	suppressed
Lyrica	Pregabalin	12	suppressed
Olanzapine	Olanzapine	12	suppressed
Ondansetron Odt	Ondansetron	12	suppressed
Sevelamer Carbonate	Sevelamer Carbonate	12	suppressed
Tolterodine Tartrate Er	Tolterodine Tartrate	12	suppressed
Breo Ellipta	Fluticasone/Vilanterol	11	suppressed
Bupropion Hcl Sr	Bupropion Hcl	11	suppressed
Carvedilol Er	Carvedilol Phosphate	11	suppressed
Cephalexin	Cephalexin	11	suppressed
Diclofenac Sodium	Diclofenac Sodium	11	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	11	11
Valsartan	Valsartan	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