Healthcare provider profile · identity verified

Alan Barker, M.D.

Family Practice · BOOTHBAY HARBOR, ME · NPI 1518900422

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	386	88
Atorvastatin Calcium	Atorvastatin Calcium	384	101
Amlodipine Besylate	Amlodipine Besylate	302	77
Lisinopril	Lisinopril	233	67
Losartan Potassium	Losartan Potassium	230	54
Tamsulosin Hcl	Tamsulosin Hcl	186	51
Simvastatin	Simvastatin	175	45
Gabapentin	Gabapentin	173	44
Metoprolol Succinate	Metoprolol Succinate	170	43
Eliquis	Apixaban	167	38
Rosuvastatin Calcium	Rosuvastatin Calcium	159	44
Hydrochlorothiazide	Hydrochlorothiazide	158	45
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	120	19
Escitalopram Oxalate	Escitalopram Oxalate	117	21
Trazodone Hcl	Trazodone Hcl	115	30
Omeprazole	Omeprazole	111	39
Alprazolam	Alprazolam	96	27
Bupropion Xl	Bupropion Hcl	93	20
Prednisone	Prednisone	91	40
Sertraline Hcl	Sertraline Hcl	88	20
Oxycodone Hcl	Oxycodone Hcl	87	18
Furosemide	Furosemide	84	26
Jardiance	Empagliflozin	81	14
Metformin Hcl	Metformin Hcl	81	27
Finasteride	Finasteride	80	23
Albuterol Sulfate Hfa	Albuterol Sulfate	79	40
Metoprolol Tartrate	Metoprolol Tartrate	79	23
Zolpidem Tartrate	Zolpidem Tartrate	77	21
Spironolactone	Spironolactone	65	13
Xarelto	Rivaroxaban	65	14
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	60	15
Doxycycline Hyclate	Doxycycline Hyclate	58	46
Warfarin Sodium	Warfarin Sodium	56	15
Metformin Hcl Er	Metformin Hcl	55	16
Quetiapine Fumarate	Quetiapine Fumarate	55	suppressed
Potassium Chloride	Potassium Chloride	53	16
Montelukast Sodium	Montelukast Sodium	50	15
Pantoprazole Sodium	Pantoprazole Sodium	46	11
Mirtazapine	Mirtazapine	45	suppressed
Tramadol Hcl	Tramadol Hcl	45	12
Lorazepam	Lorazepam	44	22
Allopurinol	Allopurinol	40	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	39	11
Benazepril Hcl	Benazepril Hcl	38	suppressed
Synthroid	Levothyroxine Sodium	37	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	36	19
Duloxetine Hcl	Duloxetine Hcl	35	suppressed
Hydralazine Hcl	Hydralazine Hcl	35	suppressed
Methylphenidate Hcl	Methylphenidate Hcl	35	suppressed
Shingrix	Varicella-Zoster Ge/As01b/Pf	35	33
Atenolol	Atenolol	33	suppressed
Ropinirole Hcl	Ropinirole Hcl	32	suppressed
Ozempic	Semaglutide	31	suppressed
Carvedilol	Carvedilol	29	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	29	14
Estradiol	Estradiol	29	11
Donepezil Hcl	Donepezil Hcl	28	suppressed
Famotidine	Famotidine	28	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	28	suppressed
Incruse Ellipta	Umeclidinium Bromide	27	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	27	23
Telmisartan	Telmisartan	27	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	26	suppressed
Risperidone	Risperidone	26	suppressed
Amoxicillin	Amoxicillin	25	12
Clopidogrel	Clopidogrel Bisulfate	25	suppressed
Gemtesa	Vibegron	24	suppressed
Nitroglycerin	Nitroglycerin	24	21
Citalopram Hbr	Citalopram Hydrobromide	23	suppressed
Dilt-Xr	Diltiazem Hcl	23	suppressed
Chlorthalidone	Chlorthalidone	22	suppressed
Fluconazole	Fluconazole	22	11
Bupropion Hcl Sr	Bupropion Hcl	21	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	21	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	21	suppressed
Diazepam	Diazepam	20	suppressed
Lansoprazole	Lansoprazole	20	suppressed
Torsemide	Torsemide	20	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	19	16
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	19	15
Ondansetron Odt	Ondansetron	19	suppressed
Ipratropium Bromide	Ipratropium Bromide	18	suppressed
Oxcarbazepine	Oxcarbazepine	18	suppressed
Terazosin Hcl	Terazosin Hcl	18	suppressed
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	17	suppressed
Ezetimibe	Ezetimibe	17	suppressed
Indapamide	Indapamide	17	suppressed
Memantine Hcl Er	Memantine Hcl	17	suppressed
Myrbetriq	Mirabegron	17	suppressed
Propranolol Hcl	Propranolol Hcl	17	suppressed
Symbicort	Budesonide/Formoterol Fumarate	17	suppressed
Buspirone Hcl	Buspirone Hcl	16	suppressed
Cephalexin	Cephalexin	16	12
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	16	suppressed
Divalproex Sodium	Divalproex Sodium	16	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	16	suppressed
Ibuprofen	Ibuprofen	16	suppressed
Lamotrigine	Lamotrigine	16	suppressed
Glipizide	Glipizide	15	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	15	suppressed
Colestipol Hcl	Colestipol Hcl	14	suppressed
Farxiga	Dapagliflozin Propanediol	14	suppressed
Nifedipine Er	Nifedipine	14	suppressed
Olanzapine	Olanzapine	14	suppressed
Paroxetine Hcl	Paroxetine Hcl	14	suppressed
Diclofenac Sodium	Diclofenac Sodium	13	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	13	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	13	suppressed
Lovastatin	Lovastatin	13	suppressed
Mycophenolate Mofetil	Mycophenolate Mofetil	13	suppressed
Tizanidine Hcl	Tizanidine Hcl	13	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	13	suppressed
Arexvy	Rsvpref3 Antigen/As01e/Pf	12	12
Brilinta	Ticagrelor	12	suppressed
Bumetanide	Bumetanide	12	suppressed
Enalapril Maleate	Enalapril Maleate	12	suppressed
Fluticasone Propionate	Fluticasone Propionate	12	suppressed
Janumet	Sitagliptin Phos/Metformin Hcl	12	suppressed
Loperamide	Loperamide Hcl	12	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	12	suppressed
Testosterone Cypionate	Testosterone Cypionate	12	suppressed
Trulicity	Dulaglutide	12	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	11	suppressed
Azithromycin	Azithromycin	11	11
Bisoprolol-Hydrochlorothiazide	Bisoprolol/Hydrochlorothiazide	11	suppressed
Clobetasol Propionate	Clobetasol Propionate	11	suppressed
Clonazepam	Clonazepam	11	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	11	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	11	11
Tresiba Flextouch U-100	Insulin Degludec	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