Healthcare provider profile · identity verified

Dean Chamberlain, DO

Family Practice · ALBION, ME · NPI 1922360411

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
Lisinopril	Lisinopril	329	98
Atorvastatin Calcium	Atorvastatin Calcium	319	105
Omeprazole	Omeprazole	269	77
Losartan Potassium	Losartan Potassium	198	62
Levothyroxine Sodium	Levothyroxine Sodium	177	49
Amlodipine Besylate	Amlodipine Besylate	170	53
Gabapentin	Gabapentin	159	52
Oxycodone Hcl	Oxycodone Hcl	137	21
Albuterol Sulfate Hfa	Albuterol Sulfate	118	60
Furosemide	Furosemide	116	38
Methadone Hcl	Methadone Hcl	115	suppressed
Pregabalin	Pregabalin	113	25
Hydrochlorothiazide	Hydrochlorothiazide	112	36
Metformin Hcl	Metformin Hcl	107	33
Famotidine	Famotidine	106	44
Pantoprazole Sodium	Pantoprazole Sodium	104	33
Metoprolol Succinate	Metoprolol Succinate	101	30
Trazodone Hcl	Trazodone Hcl	90	31
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	88	26
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	86	23
Tamsulosin Hcl	Tamsulosin Hcl	85	33
Metoprolol Tartrate	Metoprolol Tartrate	83	27
Glipizide	Glipizide	80	26
Pravastatin Sodium	Pravastatin Sodium	79	22
Tramadol Hcl	Tramadol Hcl	79	17
Rosuvastatin Calcium	Rosuvastatin Calcium	75	23
Simvastatin	Simvastatin	73	26
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	70	suppressed
Clonazepam	Clonazepam	67	suppressed
Eliquis	Apixaban	66	19
Sertraline Hcl	Sertraline Hcl	62	23
Alprazolam	Alprazolam	59	12
Prednisone	Prednisone	58	32
Triamcinolone Acetonide	Triamcinolone Acetonide	55	31
Fluticasone Propionate	Fluticasone Propionate	53	22
Atenolol	Atenolol	52	15
Meloxicam	Meloxicam	52	18
Escitalopram Oxalate	Escitalopram Oxalate	48	17
Metformin Hcl Er	Metformin Hcl	46	16
Ondansetron Odt	Ondansetron	46	13
Mirtazapine	Mirtazapine	45	15
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	45	13
Potassium Chloride	Potassium Chloride	45	19
Allopurinol	Allopurinol	43	15
Duloxetine Hcl	Duloxetine Hcl	43	15
Ibuprofen	Ibuprofen	43	14
Mounjaro	Tirzepatide	41	suppressed
Lorazepam	Lorazepam	39	12
Myrbetriq	Mirabegron	38	12
Varenicline Tartrate	Varenicline Tartrate	37	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	36	suppressed
Bupropion Xl	Bupropion Hcl	35	11
Zolpidem Tartrate	Zolpidem Tartrate	35	suppressed
Montelukast Sodium	Montelukast Sodium	34	12
Trulicity	Dulaglutide	34	suppressed
Methylphenidate Hcl	Methylphenidate Hcl	33	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	32	11
Paroxetine Hcl	Paroxetine Hcl	30	suppressed
Ropinirole Hcl	Ropinirole Hcl	30	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	30	suppressed
Diazepam	Diazepam	29	suppressed
Buprenorphine-Naloxone	Buprenorphine Hcl/Naloxone Hcl	28	suppressed
Morphine Sulfate Er	Morphine Sulfate	28	suppressed
Warfarin Sodium	Warfarin Sodium	28	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	27	25
Fluoxetine Hcl	Fluoxetine Hcl	27	suppressed
Glipizide Er	Glipizide	26	suppressed
Arnuity Ellipta	Fluticasone Furoate	25	suppressed
Carisoprodol	Carisoprodol	24	suppressed
Clopidogrel	Clopidogrel Bisulfate	24	suppressed
Estradiol	Estradiol	24	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	24	suppressed
Propranolol Hcl	Propranolol Hcl	24	suppressed
Chlorthalidone	Chlorthalidone	23	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	22	suppressed
Breo Ellipta	Fluticasone/Vilanterol	22	suppressed
Citalopram Hbr	Citalopram Hydrobromide	22	suppressed
Primidone	Primidone	22	suppressed
Carvedilol	Carvedilol	21	suppressed
Ezetimibe	Ezetimibe	21	suppressed
Finasteride	Finasteride	21	suppressed
Januvia	Sitagliptin Phosphate	21	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	21	suppressed
Linzess	Linaclotide	21	suppressed
Shingrix	Varicella-Zoster Ge/As01b/Pf	21	17
Venlafaxine Hcl Er	Venlafaxine Hcl	21	suppressed
Lovastatin	Lovastatin	20	suppressed
Nifedipine Er	Nifedipine	20	suppressed
Ozempic	Semaglutide	20	suppressed
Xtampza Er	Oxycodone Myristate	20	suppressed
Amoxicillin	Amoxicillin	19	16
Belbuca	Buprenorphine Hcl	18	suppressed
Methocarbamol	Methocarbamol	18	suppressed
Phenobarbital	Phenobarbital	18	suppressed
Ventolin Hfa	Albuterol Sulfate	18	suppressed
Clonidine Hcl	Clonidine Hcl	17	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	17	suppressed
Jantoven	Warfarin Sodium	17	suppressed
Tizanidine Hcl	Tizanidine Hcl	17	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	16	suppressed
Jardiance	Empagliflozin	16	suppressed
Oxycontin	Oxycodone Hcl	16	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	16	suppressed
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	16	suppressed
Xifaxan	Rifaximin	16	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	15	suppressed
Aripiprazole	Aripiprazole	15	suppressed
Azithromycin	Azithromycin	15	14
Fenofibrate	Fenofibrate	15	suppressed
Hydromorphone Hcl	Hydromorphone Hcl	15	suppressed
Naproxen	Naproxen	15	suppressed
Nitroglycerin	Nitroglycerin	15	suppressed
Ketoconazole	Ketoconazole	13	suppressed
Lamotrigine	Lamotrigine	13	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	13	13
Nystatin	Nystatin	13	11
Oxybutynin Chloride Er	Oxybutynin Chloride	13	suppressed
Spiriva Respimat	Tiotropium Bromide	13	suppressed
Baclofen	Baclofen	12	suppressed
Fluconazole	Fluconazole	12	11
Isosorbide Mononitrate Er	Isosorbide Mononitrate	12	suppressed
Levocarnitine	Levocarnitine	12	suppressed
Memantine Hcl	Memantine Hcl	12	suppressed
Olanzapine	Olanzapine	12	suppressed
Prazosin Hcl	Prazosin Hcl	12	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	12	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	11	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	11	suppressed
Donepezil Hcl	Donepezil Hcl	11	suppressed
Methylphenidate Er	Methylphenidate Hcl	11	suppressed
Spironolactone	Spironolactone	11	suppressed
Torsemide	Torsemide	11	suppressed
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

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