Healthcare provider profile · identity verified

Thomas C Hattan, MD

Internal Medicine · LEWISTON, ME · NPI 1598708315

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	1582	176
Sertraline Hcl	Sertraline Hcl	1581	164
Levothyroxine Sodium	Levothyroxine Sodium	1239	123
Furosemide	Furosemide	1238	136
Trazodone Hcl	Trazodone Hcl	1062	157
Amlodipine Besylate	Amlodipine Besylate	1049	113
Gabapentin	Gabapentin	844	88
Omeprazole	Omeprazole	833	101
Metoprolol Succinate	Metoprolol Succinate	732	90
Pantoprazole Sodium	Pantoprazole Sodium	696	73
Lisinopril	Lisinopril	693	73
Tamsulosin Hcl	Tamsulosin Hcl	650	72
Losartan Potassium	Losartan Potassium	623	66
Metoprolol Tartrate	Metoprolol Tartrate	577	73
Eliquis	Apixaban	571	69
Risperidone	Risperidone	519	47
Metformin Hcl	Metformin Hcl	494	52
Potassium Chloride	Potassium Chloride	430	60
Famotidine	Famotidine	401	47
Mirtazapine	Mirtazapine	390	48
Duloxetine Hcl	Duloxetine Hcl	367	39
Citalopram Hbr	Citalopram Hydrobromide	329	32
Quetiapine Fumarate	Quetiapine Fumarate	319	44
Clopidogrel	Clopidogrel Bisulfate	307	41
Jardiance	Empagliflozin	292	23
Xarelto	Rivaroxaban	280	30
Escitalopram Oxalate	Escitalopram Oxalate	276	28
Spironolactone	Spironolactone	245	28
Lorazepam	Lorazepam	243	73
Levetiracetam	Levetiracetam	222	23
Olanzapine	Olanzapine	218	18
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	217	35
Carvedilol	Carvedilol	213	25
Januvia	Sitagliptin Phosphate	212	21
Ropinirole Hcl	Ropinirole Hcl	208	25
Autoshield Duo Pen Needle	Pen Needle,dual Safety,diabetc	200	36
Buspirone Hcl	Buspirone Hcl	197	24
Fluoxetine Hcl	Fluoxetine Hcl	195	26
Baclofen	Baclofen	194	27
Fluticasone Propionate	Fluticasone Propionate	188	43
Nystatin	Nystatin	184	51
Hydrochlorothiazide	Hydrochlorothiazide	176	19
Triamcinolone Acetonide	Triamcinolone Acetonide	175	48
Donepezil Hcl	Donepezil Hcl	168	25
Latanoprost	Latanoprost	165	26
Venlafaxine Hcl Er	Venlafaxine Hcl	165	16
Simvastatin	Simvastatin	164	22
Rosuvastatin Calcium	Rosuvastatin Calcium	159	20
Lamotrigine	Lamotrigine	157	11
Glipizide	Glipizide	153	21
Ondansetron Hcl	Ondansetron Hcl	152	56
Oxycodone Hcl	Oxycodone Hcl	152	42
Prednisone	Prednisone	151	40
Finasteride	Finasteride	148	19
Warfarin Sodium	Warfarin Sodium	142	11
Tramadol Hcl	Tramadol Hcl	136	40
Carbidopa-Levodopa	Carbidopa/Levodopa	132	14
Bumetanide	Bumetanide	128	19
Myrbetriq	Mirabegron	124	16
Farxiga	Dapagliflozin Propanediol	123	19
Albuterol Sulfate Hfa	Albuterol Sulfate	121	61
Allopurinol	Allopurinol	118	14
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	118	19
Hydralazine Hcl	Hydralazine Hcl	118	23
Trulicity	Dulaglutide	118	12
Divalproex Sodium	Divalproex Sodium	114	11
Lactulose	Lactulose	110	18
Atenolol	Atenolol	106	12
Cephalexin	Cephalexin	106	59
Isosorbide Mononitrate Er	Isosorbide Mononitrate	104	17
Novolog Flexpen	Insulin Aspart	104	13
Midodrine Hcl	Midodrine Hcl	101	15
Paroxetine Hcl	Paroxetine Hcl	101	13
Sucralfate	Sucralfate	100	suppressed
Aripiprazole	Aripiprazole	99	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	99	23
Memantine Hcl	Memantine Hcl	95	14
Meloxicam	Meloxicam	93	11
Montelukast Sodium	Montelukast Sodium	91	12
Metformin Hcl Er	Metformin Hcl	84	12
Methimazole	Methimazole	83	suppressed
Breo Ellipta	Fluticasone/Vilanterol	81	14
Tizanidine Hcl	Tizanidine Hcl	78	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	73	suppressed
Humalog Kwikpen U-100	Insulin Lispro	70	11
Nystop	Nystatin	69	40
Venlafaxine Hcl	Venlafaxine Hcl	67	suppressed
Primidone	Primidone	66	suppressed
Topiramate	Topiramate	65	suppressed
Torsemide	Torsemide	65	12
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	65	13
Bupropion Hcl Sr	Bupropion Hcl	63	suppressed
Chlorpromazine Hcl	Chlorpromazine Hcl	63	suppressed
Divalproex Sodium Er	Divalproex Sodium	63	suppressed
Tradjenta	Linagliptin	63	suppressed
Alendronate Sodium	Alendronate Sodium	61	suppressed
Benztropine Mesylate	Benztropine Mesylate	61	suppressed
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	60	20
Valsartan	Valsartan	60	suppressed
Amiodarone Hcl	Amiodarone Hcl	58	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	56	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	56	14
Clonazepam	Clonazepam	55	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	55	34
Labetalol Hcl	Labetalol Hcl	53	suppressed
Novofine Autocover	Pen Needle, Diabetic, Safety	53	19
Spiriva Handihaler	Tiotropium Bromide	53	suppressed
Propranolol Hcl	Propranolol Hcl	52	suppressed
Haloperidol Lactate	Haloperidol Lactate	51	11
Felodipine Er	Felodipine	50	suppressed
Morphine Sulfate	Morphine Sulfate	50	33
Ziprasidone Hcl	Ziprasidone Hcl	50	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	49	20
Doxepin Hcl	Doxepin Hcl	46	suppressed
Oxcarbazepine	Oxcarbazepine	45	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	45	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	44	30
Lumigan	Bimatoprost	44	suppressed
Bupropion Xl	Bupropion Hcl	43	suppressed
Glycopyrrolate	Glycopyrrolate	40	suppressed
Phenobarbital	Phenobarbital	40	suppressed
Valproic Acid	Valproic Acid (As Sodium Salt)	40	suppressed
Sevelamer Carbonate	Sevelamer Carbonate	37	suppressed
Ventolin Hfa	Albuterol Sulfate	37	23
Esomeprazole Magnesium	Esomeprazole Magnesium	36	suppressed
Incruse Ellipta	Umeclidinium Bromide	36	suppressed
Nitroglycerin	Nitroglycerin	36	32
Prazosin Hcl	Prazosin Hcl	36	suppressed
Azathioprine	Azathioprine	35	suppressed
Clonidine Hcl	Clonidine Hcl	35	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	35	12
Oxybutynin Chloride	Oxybutynin Chloride	35	suppressed
Bupropion Hcl	Bupropion Hcl	34	suppressed
Colestipol Hcl	Colestipol Hcl	34	suppressed
Diltiazem Hcl	Diltiazem Hcl	34	suppressed
Betamethasone Dipropionate	Betamethasone Dipropionate	33	suppressed
Digoxin	Digoxin	33	suppressed
Fluphenazine Hcl	Fluphenazine Hcl	33	suppressed
Novolog Mix 70-30 Flexpen	Insulin Aspart Prot/Insuln Asp	33	suppressed
Pravastatin Sodium	Pravastatin Sodium	33	suppressed
Fluconazole	Fluconazole	32	14
Ketoconazole	Ketoconazole	32	16
Levemir Flexpen	Insulin Detemir	32	suppressed
Rocklatan	Netarsudil Mesylat/Latanoprost	32	suppressed
Valproic Acid	Valproic Acid	32	suppressed
Arexvy	Rsvpref3 Antigen/As01e/Pf	31	31
Fentanyl	Fentanyl	31	13
Sps	Sodium Polystyrene Sulfon/Sorb	31	suppressed
Carbidopa-Levodopa Er	Carbidopa/Levodopa	30	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	30	suppressed
Pregabalin	Pregabalin	30	11
Doxycycline Monohydrate	Doxycycline Monohydrate	29	suppressed
Methotrexate	Methotrexate Sodium	29	suppressed
Advair Hfa	Fluticasone Propion/Salmeterol	28	suppressed
Amantadine	Amantadine Hcl	28	suppressed
Azithromycin	Azithromycin	27	20
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	27	11
Lacosamide	Lacosamide	27	suppressed
Ozempic	Semaglutide	27	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	27	suppressed
Clozapine	Clozapine	26	suppressed
Dapagliflozin	Dapagliflozin Propanediol	26	suppressed
Glimepiride	Glimepiride	26	suppressed
Insulin Lispro	Insulin Lispro	26	suppressed
Isosorbide Dinitrate	Isosorbide Dinitrate	26	suppressed
Jentadueto	Linagliptin/Metformin Hcl	26	suppressed
Pyridostigmine Bromide	Pyridostigmine Bromide	26	suppressed
Caplyta	Lumateperone Tosylate	25	suppressed
Creon	Lipase/Protease/Amylase	25	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	25	11
Serevent Diskus	Salmeterol Xinafoate	25	suppressed
Chlorthalidone	Chlorthalidone	24	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	24	suppressed
Nadolol	Nadolol	24	suppressed
Nifedipine Er	Nifedipine	24	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	24	suppressed
Carbamazepine	Carbamazepine	23	suppressed
Haloperidol	Haloperidol	23	12
Metronidazole	Metronidazole	23	suppressed
Combigan	Brimonidine Tartrate/Timolol	22	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	22	suppressed
Levofloxacin	Levofloxacin	22	16
Symbicort	Budesonide/Formoterol Fumarate	22	suppressed
Dorzolamide Hcl	Dorzolamide Hcl	21	suppressed
Invokana	Canagliflozin	21	suppressed
Loperamide	Loperamide Hcl	21	suppressed
Mycophenolate Mofetil	Mycophenolate Mofetil	21	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	21	suppressed
Trihexyphenidyl Hcl	Trihexyphenidyl Hcl	21	suppressed
Timolol Maleate	Timolol Maleate	20	suppressed
Brimonidine Tartrate-Timolol	Brimonidine Tartrate/Timolol	19	suppressed
Felbamate	Felbamate	19	suppressed
Fludrocortisone Acetate	Fludrocortisone Acetate	19	suppressed
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	19	15
Lovastatin	Lovastatin	19	suppressed
Solifenacin Succinate	Solifenacin Succinate	19	suppressed
Xtampza Er	Oxycodone Myristate	19	suppressed
Chlorhexidine Gluconate	Chlorhexidine Gluconate	18	suppressed
Erythromycin	Erythromycin Base	18	11
Fingolimod	Fingolimod Hcl	18	suppressed
Meclizine Hcl	Meclizine Hcl	18	suppressed
Velphoro	Sucroferric Oxyhydroxide	18	suppressed
Benazepril Hcl	Benazepril Hcl	17	suppressed
Humalog	Insulin Lispro	17	suppressed
Novolin 70-30	Insulin Nph Hum/Reg Insulin Hm	17	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	16	suppressed
Ipratropium Bromide	Ipratropium Bromide	16	suppressed
Perphenazine	Perphenazine	16	suppressed
Ammonium Lactate	Ammonium Lactate	15	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	15	13
Aptiom	Eslicarbazepine Acetate	15	suppressed
Clobazam	Clobazam	15	suppressed
Insulin Aspart Flexpen	Insulin Aspart	15	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	15	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	15	suppressed
Methenamine Hippurate	Methenamine Hippurate	15	suppressed
Metolazone	Metolazone	15	suppressed
Brimonidine Tartrate	Brimonidine Tartrate	14	suppressed
Clindamycin Phosphate	Clindamycin Phosphate	14	suppressed
Clonidine	Clonidine	14	suppressed
Copaxone	Glatiramer Acetate	14	suppressed
Fluticasone Propionate Hfa	Fluticasone Propionate	14	suppressed
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	14	suppressed
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	14	suppressed
Lurasidone Hcl	Lurasidone Hcl	14	suppressed
Morphine Sulfate Er	Morphine Sulfate	14	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	14	14
Propranolol Hcl Er	Propranolol Hcl	14	suppressed
Cefdinir	Cefdinir	13	12
Clobetasol Propionate	Clobetasol Propionate	13	suppressed
Epinephrine	Epinephrine	13	11
Letrozole	Letrozole	13	suppressed
Lidocaine	Lidocaine	13	suppressed
Mounjaro	Tirzepatide	13	suppressed
Namzaric	Memantine Hcl/Donepezil Hcl	13	suppressed
Ondansetron Odt	Ondansetron	13	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	13	suppressed
Ranolazine Er	Ranolazine	13	suppressed
Sulindac	Sulindac	13	suppressed
Toujeo Max Solostar	Insulin Glargine,hum.Rec.Anlog	13	suppressed
Bethanechol Chloride	Bethanechol Chloride	12	suppressed
Folic Acid	Folic Acid	12	suppressed
Lansoprazole	Lansoprazole	12	suppressed
Lithium Carbonate Er	Lithium Carbonate	12	suppressed
Methadone Hcl	Methadone Hcl	12	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	12	suppressed
Roflumilast	Roflumilast	12	suppressed
Trospium Chloride	Trospium Chloride	12	suppressed
Arnuity Ellipta	Fluticasone Furoate	11	suppressed
Calcitonin-Salmon	Calcitonin,salmon,synthetic	11	suppressed
Desipramine Hcl	Desipramine Hcl	11	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	11	suppressed
Konvomep	Omeprazole/Sodium Bicarbonate	11	suppressed
Novolin 70-30 Flexpen	Insulin Nph Hum/Reg Insulin Hm	11	suppressed
Prednisolone Acetate	Prednisolone Acetate	11	suppressed
Travoprost	Travoprost	11	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	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