Healthcare provider profile · identity verified

Deirdre Heersink, DO

Geriatric Medicine · TOPSHAM, ME · NPI 1417157298

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	587	58
Eliquis	Apixaban	577	56
Atorvastatin Calcium	Atorvastatin Calcium	517	73
Sertraline Hcl	Sertraline Hcl	388	53
Furosemide	Furosemide	360	54
Pantoprazole Sodium	Pantoprazole Sodium	279	44
Omeprazole	Omeprazole	234	39
Metoprolol Succinate	Metoprolol Succinate	230	38
Metoprolol Tartrate	Metoprolol Tartrate	190	28
Lisinopril	Lisinopril	187	26
Losartan Potassium	Losartan Potassium	166	29
Amlodipine Besylate	Amlodipine Besylate	165	33
Trazodone Hcl	Trazodone Hcl	149	28
Torsemide	Torsemide	148	26
Gabapentin	Gabapentin	140	22
Potassium Chloride	Potassium Chloride	129	29
Allopurinol	Allopurinol	123	13
Finasteride	Finasteride	123	16
Levetiracetam	Levetiracetam	123	17
Mirtazapine	Mirtazapine	123	22
Metformin Hcl Er	Metformin Hcl	115	17
Tamsulosin Hcl	Tamsulosin Hcl	105	20
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	94	11
Jardiance	Empagliflozin	92	11
Rosuvastatin Calcium	Rosuvastatin Calcium	91	11
Carbidopa-Levodopa	Carbidopa/Levodopa	89	12
Clopidogrel	Clopidogrel Bisulfate	86	14
Donepezil Hcl	Donepezil Hcl	84	suppressed
Lactulose	Lactulose	83	22
Fluticasone Propionate	Fluticasone Propionate	76	18
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	76	19
Olanzapine	Olanzapine	76	13
Escitalopram Oxalate	Escitalopram Oxalate	75	13
Baclofen	Baclofen	70	suppressed
Prednisone	Prednisone	70	20
Aripiprazole	Aripiprazole	69	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	69	15
Carvedilol	Carvedilol	68	suppressed
Novolog Flexpen	Insulin Aspart	68	suppressed
Simvastatin	Simvastatin	67	suppressed
Myrbetriq	Mirabegron	65	suppressed
Memantine Hcl	Memantine Hcl	64	suppressed
Cefpodoxime Proxetil	Cefpodoxime Proxetil	62	41
Methenamine Hippurate	Methenamine Hippurate	62	suppressed
Ropinirole Hcl	Ropinirole Hcl	58	suppressed
Metformin Hcl	Metformin Hcl	57	12
Farxiga	Dapagliflozin Propanediol	53	suppressed
Bumetanide	Bumetanide	52	suppressed
Divalproex Sodium	Divalproex Sodium	52	suppressed
Ondansetron Odt	Ondansetron	47	18
Latanoprost	Latanoprost	43	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	42	suppressed
Lamotrigine	Lamotrigine	42	suppressed
Ondansetron Hcl	Ondansetron Hcl	42	20
Quetiapine Fumarate	Quetiapine Fumarate	42	suppressed
Oseltamivir Phosphate	Oseltamivir Phosphate	41	39
Ozempic	Semaglutide	39	suppressed
Diclofenac Sodium	Diclofenac Sodium	38	17
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	38	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	38	suppressed
Midodrine Hcl	Midodrine Hcl	38	11
Autoshield Duo Pen Needle	Pen Needle,dual Safety,diabetc	37	suppressed
Risperidone	Risperidone	37	suppressed
Duloxetine Hcl	Duloxetine Hcl	36	suppressed
Savaysa	Edoxaban Tosylate	36	suppressed
Citalopram Hbr	Citalopram Hydrobromide	35	suppressed
Hydrochlorothiazide	Hydrochlorothiazide	35	suppressed
Nystop	Nystatin	35	suppressed
Buprenorphine	Buprenorphine	34	12
Lokelma	Sodium Zirconium Cyclosilicate	34	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	33	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	32	16
Entacapone	Entacapone	32	suppressed
Haloperidol	Haloperidol	31	suppressed
Clobetasol Propionate	Clobetasol Propionate	30	suppressed
Glipizide	Glipizide	29	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	28	14
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	27	22
Metolazone	Metolazone	27	suppressed
Fosfomycin Tromethamine	Fosfomycin Tromethamine	26	suppressed
Lumigan	Bimatoprost	26	suppressed
Clonidine Hcl	Clonidine Hcl	25	suppressed
Novofine Autocover	Pen Needle, Diabetic, Safety	25	suppressed
Topiramate	Topiramate	25	suppressed
Xarelto	Rivaroxaban	25	suppressed
Atropine Sulfate	Atropine Sulfate	24	16
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	24	11
Ketoconazole	Ketoconazole	24	suppressed
Restasis	Cyclosporine	24	suppressed
Incruse Ellipta	Umeclidinium Bromide	23	suppressed
Sevelamer Carbonate	Sevelamer Carbonate	23	suppressed
Celecoxib	Celecoxib	22	suppressed
Cephalexin	Cephalexin	22	15
Hydralazine Hcl	Hydralazine Hcl	22	suppressed
Minocycline Hcl	Minocycline Hcl	22	suppressed
Spironolactone	Spironolactone	22	suppressed
Combigan	Brimonidine Tartrate/Timolol	21	suppressed
Famotidine	Famotidine	21	suppressed
Montelukast Sodium	Montelukast Sodium	21	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	20	suppressed
Albuterol Sulfate Hfa	Albuterol Sulfate	19	15
Carbidopa-Levodopa Er	Carbidopa/Levodopa	19	suppressed
Fludrocortisone Acetate	Fludrocortisone Acetate	19	suppressed
Nitroglycerin	Nitroglycerin	19	15
Albuterol Sulfate	Albuterol Sulfate	18	14
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	18	suppressed
Fluconazole	Fluconazole	18	suppressed
Konvomep	Omeprazole/Sodium Bicarbonate	18	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	18	suppressed
Paroxetine Hcl	Paroxetine Hcl	18	suppressed
Thiothixene	Thiothixene	18	suppressed
Toujeo Solostar	Insulin Glargine,hum.Rec.Anlog	18	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	17	suppressed
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	17	suppressed
Eplerenone	Eplerenone	17	suppressed
Nitrofurantoin	Nitrofurantoin Macrocrystal	17	suppressed
Olanzapine Odt	Olanzapine	17	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	17	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	16	suppressed
Azithromycin	Azithromycin	16	suppressed
Mounjaro	Tirzepatide	16	suppressed
Oxcarbazepine	Oxcarbazepine	16	suppressed
Alendronate Sodium	Alendronate Sodium	15	suppressed
Gemtesa	Vibegron	15	suppressed
Humalog Kwikpen U-100	Insulin Lispro	15	suppressed
Nystatin	Nystatin	15	suppressed
Sevelamer Hcl	Sevelamer Hcl	15	suppressed
Amantadine	Amantadine Hcl	14	suppressed
Bupropion Hcl	Bupropion Hcl	14	suppressed
Clonidine	Clonidine	14	suppressed
Entresto	Sacubitril/Valsartan	14	suppressed
Methimazole	Methimazole	14	suppressed
Stiolto Respimat	Tiotropium Br/Olodaterol Hcl	14	suppressed
Valproic Acid	Valproic Acid (As Sodium Salt)	14	suppressed
Amiodarone Hcl	Amiodarone Hcl	13	suppressed
Atenolol	Atenolol	13	suppressed
Buspirone Hcl	Buspirone Hcl	13	suppressed
Felbamate	Felbamate	13	suppressed
Fiasp Flextouch	Insulin Aspart (Niacinamide)	13	suppressed
Fluticasone-Salmeterol Hfa	Fluticasone Propion/Salmeterol	13	suppressed
Isosorbide Dinitrate	Isosorbide Dinitrate	13	suppressed
Januvia	Sitagliptin Phosphate	13	suppressed
Lorazepam	Lorazepam	13	suppressed
Medroxyprogesterone Acetate	Medroxyprogesterone Acetate	13	suppressed
Methotrexate	Methotrexate Sodium	13	suppressed
Terazosin Hcl	Terazosin Hcl	13	suppressed
Topiramate Er	Topiramate	13	suppressed
Xtandi	Enzalutamide	13	suppressed
Carbidopa-Levodopa-Entacapone	Carbidopa/Levodopa/Entacapone	12	suppressed
Chlorhexidine Gluconate	Chlorhexidine Gluconate	12	suppressed
Colchicine	Colchicine	12	suppressed
Dutasteride	Dutasteride	12	suppressed
Erythromycin	Erythromycin Base	12	suppressed
Ezetimibe	Ezetimibe	12	suppressed
Fenofibrate	Fenofibrate,micronized	12	suppressed
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	12	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	12	suppressed
Mesalamine	Mesalamine	12	suppressed
Prazosin Hcl	Prazosin Hcl	12	suppressed
Symbicort	Budesonide/Formoterol Fumarate	12	suppressed
Aspirin-Dipyridamole Er	Aspirin/Dipyridamole	11	suppressed
Bevespi Aerosphere	Glycopyrrolate/Formoterol Fum	11	suppressed
Estradiol	Estradiol	11	suppressed
Insulin Aspart Flexpen	Insulin Aspart	11	suppressed
Lanthanum Carbonate	Lanthanum Carbonate	11	suppressed
Oxycodone Hcl	Oxycodone Hcl	11	suppressed
Tizanidine Hcl	Tizanidine Hcl	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