Healthcare provider profile · identity verified

Dan O'Brien, D.O.

Family Practice · ORLEANS, IN · NPI 1427036474

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	642	152
Amlodipine Besylate	Amlodipine Besylate	555	139
Levothyroxine Sodium	Levothyroxine Sodium	491	114
Omeprazole	Omeprazole	407	104
Hydrochlorothiazide	Hydrochlorothiazide	401	102
Losartan Potassium	Losartan Potassium	347	87
Lisinopril	Lisinopril	341	91
Gabapentin	Gabapentin	336	81
Metformin Hcl	Metformin Hcl	305	79
Tamsulosin Hcl	Tamsulosin Hcl	294	71
Prednisone	Prednisone	273	143
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	241	57
Pantoprazole Sodium	Pantoprazole Sodium	229	49
Furosemide	Furosemide	199	55
Rosuvastatin Calcium	Rosuvastatin Calcium	197	61
Metformin Hcl Er	Metformin Hcl	187	45
Simvastatin	Simvastatin	168	47
Montelukast Sodium	Montelukast Sodium	163	31
Metoprolol Succinate	Metoprolol Succinate	160	43
Escitalopram Oxalate	Escitalopram Oxalate	159	42
Albuterol Sulfate Hfa	Albuterol Sulfate	149	41
Atenolol	Atenolol	149	33
Metoprolol Tartrate	Metoprolol Tartrate	145	37
Meloxicam	Meloxicam	141	37
Glimepiride	Glimepiride	137	34
Citalopram Hbr	Citalopram Hydrobromide	129	28
Eliquis	Apixaban	126	31
Potassium Chloride	Potassium Chloride	124	36
Famotidine	Famotidine	123	30
Sertraline Hcl	Sertraline Hcl	121	33
Cephalexin	Cephalexin	118	79
Ozempic	Semaglutide	114	29
Clopidogrel	Clopidogrel Bisulfate	113	30
Amoxicillin	Amoxicillin	111	85
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	109	28
Carvedilol	Carvedilol	102	31
Allopurinol	Allopurinol	101	20
Januvia	Sitagliptin Phosphate	93	12
Duloxetine Hcl	Duloxetine Hcl	92	19
Warfarin Sodium	Warfarin Sodium	91	20
Pravastatin Sodium	Pravastatin Sodium	90	25
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	86	25
Azithromycin	Azithromycin	79	60
Mounjaro	Tirzepatide	74	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	71	16
Lovastatin	Lovastatin	69	15
Mirtazapine	Mirtazapine	69	15
Fluticasone Propionate	Fluticasone Propionate	68	25
Spironolactone	Spironolactone	67	15
Alprazolam	Alprazolam	62	20
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	62	52
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	61	13
Pioglitazone Hcl	Pioglitazone Hcl	57	17
Buspirone Hcl	Buspirone Hcl	56	16
Bupropion Xl	Bupropion Hcl	52	12
Fluoxetine Hcl	Fluoxetine Hcl	51	12
Trulicity	Dulaglutide	48	11
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	46	22
Novolog Flexpen	Insulin Aspart	46	14
Fluconazole	Fluconazole	43	25
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	43	40
Breo Ellipta	Fluticasone/Vilanterol	42	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	42	18
Verapamil Er	Verapamil Hcl	42	suppressed
Hydralazine Hcl	Hydralazine Hcl	41	suppressed
Naproxen	Naproxen	41	11
Venlafaxine Hcl Er	Venlafaxine Hcl	41	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	40	27
Oxybutynin Chloride	Oxybutynin Chloride	39	11
Cilostazol	Cilostazol	36	suppressed
Trazodone Hcl	Trazodone Hcl	36	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	33	12
Fenofibrate	Fenofibrate Nanocrystallized	33	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	32	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	32	suppressed
Synthroid	Levothyroxine Sodium	32	11
Jardiance	Empagliflozin	31	suppressed
Ondansetron Hcl	Ondansetron Hcl	31	15
Pregabalin	Pregabalin	31	suppressed
Torsemide	Torsemide	31	suppressed
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	31	suppressed
Digoxin	Digoxin	29	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	29	suppressed
Paroxetine Hcl	Paroxetine Hcl	29	suppressed
Celecoxib	Celecoxib	28	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	28	14
Estradiol	Estradiol	28	suppressed
Nystatin	Nystatin	27	16
Olmesartan Medoxomil	Olmesartan Medoxomil	27	suppressed
Tresiba Flextouch U-100	Insulin Degludec	27	suppressed
Farxiga	Dapagliflozin Propanediol	26	suppressed
Glipizide Er	Glipizide	26	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	26	19
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	25	suppressed
Propranolol Hcl	Propranolol Hcl	25	suppressed
Sucralfate	Sucralfate	25	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	24	suppressed
Enalapril Maleate	Enalapril Maleate	24	suppressed
Ibuprofen	Ibuprofen	24	suppressed
Lorazepam	Lorazepam	24	suppressed
Meclizine Hcl	Meclizine Hcl	24	15
Colestipol Hcl	Colestipol Hcl	23	suppressed
Glipizide	Glipizide	23	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	23	suppressed
Ramipril	Ramipril	23	suppressed
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	23	suppressed
Bupropion Hcl Sr	Bupropion Hcl	22	suppressed
Gemfibrozil	Gemfibrozil	22	suppressed
Humalog Kwikpen U-100	Insulin Lispro	22	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	22	suppressed
Clonazepam	Clonazepam	21	suppressed
Olanzapine	Olanzapine	21	suppressed
Alendronate Sodium	Alendronate Sodium	20	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	20	suppressed
Baclofen	Baclofen	20	11
Donepezil Hcl	Donepezil Hcl	20	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	20	18
Fenofibrate	Fenofibrate	20	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	20	suppressed
Risperidone	Risperidone	19	suppressed
Ultra-Fine Short Pen Needle	Pen Needle, Diabetic	19	suppressed
Ventolin Hfa	Albuterol Sulfate	19	suppressed
Xarelto	Rivaroxaban	19	suppressed
Cefuroxime	Cefuroxime Axetil	18	14
Clonidine Hcl	Clonidine Hcl	18	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	18	suppressed
Humulin 70/30 Kwikpen	Insulin Nph Hum/Reg Insulin Hm	17	suppressed
Diclofenac Sodium	Diclofenac Sodium	16	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	16	suppressed
Ropinirole Hcl	Ropinirole Hcl	16	suppressed
Breztri Aerosphere	Budesonide/Glycopyr/Formoterol	15	suppressed
Chlorthalidone	Chlorthalidone	15	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	15	suppressed
Ibandronate Sodium	Ibandronate Sodium	15	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	15	suppressed
Levemir Flexpen	Insulin Detemir	15	suppressed
Levetiracetam	Levetiracetam	15	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	15	suppressed
Nitroglycerin	Nitroglycerin	15	suppressed
Toujeo Solostar	Insulin Glargine,hum.Rec.Anlog	15	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	15	suppressed
Carbamazepine Er	Carbamazepine	14	suppressed
Colchicine	Colchicine	14	suppressed
Finasteride	Finasteride	14	suppressed
Irbesartan	Irbesartan	14	suppressed
Lansoprazole	Lansoprazole	14	suppressed
Nifedipine Er	Nifedipine	14	suppressed
Primidone	Primidone	14	suppressed
Tramadol Hcl	Tramadol Hcl	14	suppressed
Clotrimazole	Clotrimazole	13	suppressed
Diazepam	Diazepam	13	suppressed
Eszopiclone	Eszopiclone	13	suppressed
Jantoven	Warfarin Sodium	13	suppressed
Novolog Mix 70-30 Flexpen	Insulin Aspart Prot/Insuln Asp	13	suppressed
Valacyclovir	Valacyclovir Hcl	13	suppressed
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	12	suppressed
Metronidazole	Metronidazole	12	suppressed
Ondansetron Odt	Ondansetron	12	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	12	12
Semglee (Yfgn) Pen	Insulin Glargine-Yfgn	12	suppressed
Theophylline Er	Theophylline Anhydrous	12	suppressed
Bisoprolol-Hydrochlorothiazide	Bisoprolol/Hydrochlorothiazide	11	suppressed
Linzess	Linaclotide	11	suppressed
Nebivolol Hcl	Nebivolol Hcl	11	suppressed
Otezla	Apremilast	11	suppressed
Solifenacin Succinate	Solifenacin Succinate	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