Healthcare provider profile · identity verified

Charles S Kaplan, MD

Allopathic & Osteopathic Physicians|Internal Medicine · TUCSON, AZ · NPI 1538117536

Profile state: payments and partd 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

CMS Open Payments records show Charles S Kaplan, MD received $101.40 in general payments during 2025 across 4 reported records.

Ferring Pharmaceuticals Inc. accounted for 46.7% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 3 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Gemtesa.

Sumitomo Pharma America, Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported GEMTESA as an associated drug or biological on 61692 records involving 22152 distinct recipient NPIs. Public Medicare Part D data also shows 11 claims for Gemtesa by this doctor in 2024.

These records do not establish that a payment influenced prescribing or medical care.

Payment overview · 2025

General Payments

$101.40

4 reported records · 3 companies

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.

Who paid this doctor?

Companies in 2025 General Payments

Reported company	Canonical company	Amount	Share	Records	Year
Ferring Pharmaceuticals Inc.	Unresolved — no canonical attribution shown	$47.32	46.7%	2	2025
Boston Scientific Corporation	Unresolved — no canonical attribution shown	$29.20	28.8%	1	2025
Sumitomo Pharma America, Inc.	Unresolved — no canonical attribution shown	$24.88	24.5%	1	2025

What were the payments for?

Payment categories

Category	Amount	Records
Food and Beverage	$101.40	4

A meal, consulting fee, royalty, and travel payment describe different kinds of reported relationships and should not be interpreted as equivalent.

Analysis 1 · Payment-linked products

Products named in Open Payments records

Reported product	Type	Reported company	Related amount*	Records	Year
ADSTILADRIN Normalized: adstiladrin	Biological	Ferring Pharmaceuticals Inc.	$47.32	2	2025
Source payment records 2025-08-01 · Ferring Pharmaceuticals Inc. · $15.36 · Open Payments source 2025-10-01 · Ferring Pharmaceuticals Inc. · $31.96 · Open Payments source
WATCHMAN FLX Normalized: watchman flx	Device	Boston Scientific Corporation	$29.20	1	2025
Source payment records 2025-08-05 · Boston Scientific Corporation · $29.20 · Open Payments source
GEMTESA Normalized: gemtesa	Drug	Sumitomo Pharma America, Inc.	$24.88	1	2025
Source payment records 2025-01-30 · Sumitomo Pharma America, Inc. · $24.88 · Open Payments source

* Product-associated amounts are non-additive because one payment record may name more than one product.

These products were named on specific Open Payments records. A named product does not show that the payment influenced treatment or prescribing.

Public prescribing for products named in payments

Open Payments product	Payment year	Part D brand	Part D year	Claims	Match method	Source
GEMTESA gemtesa	2025	Gemtesa	2024	11 Beneficiary count suppressed	exact normalized	Medicare Part D

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.

Paying company	Payment year	Drug reported by same entity	Open Payments evidence	Part D	Claims	Beneficiaries
Sumitomo Pharma America, Inc. Exact reporting entity; no affiliate inference	2025	GEMTESA open payments reported associated product	CMS Open Payments — General Payments 61692 supporting records · 22152 recipient NPIs · example record 1176593503	Gemtesa · 2024 Exact normalized brand match · 1 Part D row	11	suppressed by CMS

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	871	239
Atorvastatin Calcium	Atorvastatin Calcium	595	170
Lisinopril	Lisinopril	544	162
Gabapentin	Gabapentin	537	143
Amlodipine Besylate	Amlodipine Besylate	532	157
Losartan Potassium	Losartan Potassium	420	126
Metformin Hcl	Metformin Hcl	381	122
Simvastatin	Simvastatin	381	103
Rosuvastatin Calcium	Rosuvastatin Calcium	346	102
Metoprolol Succinate	Metoprolol Succinate	322	92
Potassium Chloride	Potassium Chloride	296	90
Oxycodone Hcl	Oxycodone Hcl	283	45
Omeprazole	Omeprazole	280	92
Pantoprazole Sodium	Pantoprazole Sodium	244	72
Tamsulosin Hcl	Tamsulosin Hcl	232	71
Atenolol	Atenolol	217	60
Allopurinol	Allopurinol	216	61
Furosemide	Furosemide	215	67
Hydrochlorothiazide	Hydrochlorothiazide	215	65
Montelukast Sodium	Montelukast Sodium	198	53
Albuterol Sulfate Hfa	Albuterol Sulfate	197	70
Trazodone Hcl	Trazodone Hcl	190	45
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	180	35
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	163	21
Alprazolam	Alprazolam	144	29
Famotidine	Famotidine	143	43
Tramadol Hcl	Tramadol Hcl	138	36
Pravastatin Sodium	Pravastatin Sodium	135	42
Meloxicam	Meloxicam	130	42
Zolpidem Tartrate	Zolpidem Tartrate	123	28
Lorazepam	Lorazepam	121	29
Duloxetine Hcl	Duloxetine Hcl	113	33
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	108	33
Eliquis	Apixaban	101	28
Escitalopram Oxalate	Escitalopram Oxalate	99	33
Acyclovir	Acyclovir	95	25
Diazepam	Diazepam	95	19
Ezetimibe	Ezetimibe	94	24
Morphine Sulfate Er	Morphine Sulfate	90	suppressed
Celecoxib	Celecoxib	89	25
Tizanidine Hcl	Tizanidine Hcl	88	23
Jardiance	Empagliflozin	86	24
Lovastatin	Lovastatin	86	25
Azithromycin	Azithromycin	85	65
Fluticasone Propionate	Fluticasone Propionate	84	34
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	83	28
Fluoxetine Hcl	Fluoxetine Hcl	83	20
Mirtazapine	Mirtazapine	80	24
Ibuprofen	Ibuprofen	79	22
Clopidogrel	Clopidogrel Bisulfate	78	23
Triamcinolone Acetonide	Triamcinolone Acetonide	76	38
Spironolactone	Spironolactone	75	22
Amitriptyline Hcl	Amitriptyline Hcl	74	13
Metoprolol Tartrate	Metoprolol Tartrate	73	26
Ondansetron Hcl	Ondansetron Hcl	71	23
Sumatriptan Succinate	Sumatriptan Succinate	69	14
Prednisone	Prednisone	68	22
Carvedilol	Carvedilol	66	20
Donepezil Hcl	Donepezil Hcl	66	22
Methocarbamol	Methocarbamol	66	23
Alendronate Sodium	Alendronate Sodium	64	21
Sertraline Hcl	Sertraline Hcl	64	22
Temazepam	Temazepam	62	12
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	60	19
Buspirone Hcl	Buspirone Hcl	59	11
Finasteride	Finasteride	58	16
Venlafaxine Hcl Er	Venlafaxine Hcl	56	16
Warfarin Sodium	Warfarin Sodium	55	14
Diclofenac Sodium	Diclofenac Sodium	54	17
Amoxicillin	Amoxicillin	53	37
Glipizide	Glipizide	53	19
Naproxen	Naproxen	53	17
Baclofen	Baclofen	51	14
Synthroid	Levothyroxine Sodium	50	14
Terazosin Hcl	Terazosin Hcl	49	15
Ciprofloxacin Hcl	Ciprofloxacin Hcl	48	42
Trulicity	Dulaglutide	48	suppressed
Methylprednisolone	Methylprednisolone	47	37
Ondansetron Odt	Ondansetron	47	15
Ropinirole Hcl	Ropinirole Hcl	47	suppressed
Estradiol	Estradiol	46	13
Paroxetine Hcl	Paroxetine Hcl	46	12
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	46	40
Cephalexin	Cephalexin	45	36
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	45	14
Morphine Sulfate	Morphine Sulfate	45	suppressed
Clonazepam	Clonazepam	44	suppressed
Testosterone Cypionate	Testosterone Cypionate	44	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	43	11
Valsartan	Valsartan	43	13
Citalopram Hbr	Citalopram Hydrobromide	41	11
Glipizide Er	Glipizide	41	11
Lantus	Insulin Glargine,hum.Rec.Anlog	41	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	41	41
Januvia	Sitagliptin Phosphate	40	11
Clonidine Hcl	Clonidine Hcl	38	13
Meclizine Hcl	Meclizine Hcl	38	13
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	38	14
Olmesartan Medoxomil	Olmesartan Medoxomil	38	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	37	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	37	30
Eszopiclone	Eszopiclone	36	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	36	29
Azelastine Hcl	Azelastine Hcl	35	13
Insulin Syringe	Syringe-Needle,insulin,0.5 Ml	35	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	35	suppressed
Nystatin	Nystatin	35	16
Carisoprodol	Carisoprodol	34	suppressed
Hydralazine Hcl	Hydralazine Hcl	34	suppressed
Raloxifene Hcl	Raloxifene Hcl	34	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	33	suppressed
Mounjaro	Tirzepatide	31	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	31	suppressed
Pregabalin	Pregabalin	31	11
Esomeprazole Magnesium	Esomeprazole Magnesium	30	suppressed
Verapamil Er	Verapamil Hcl	30	suppressed
Glimepiride	Glimepiride	29	suppressed
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	29	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	29	suppressed
Metronidazole	Metronidazole	29	24
Ciclopirox	Ciclopirox	28	13
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	28	suppressed
Prolia	Denosumab	28	16
Xarelto	Rivaroxaban	28	suppressed
Alfuzosin Hcl Er	Alfuzosin Hcl	27	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	27	26
Hydromorphone Hcl	Hydromorphone Hcl	27	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	27	13
Propranolol Hcl	Propranolol Hcl	27	suppressed
Ventolin Hfa	Albuterol Sulfate	26	suppressed
Amiodarone Hcl	Amiodarone Hcl	25	suppressed
Bupropion Hcl	Bupropion Hcl	25	suppressed
Fluconazole	Fluconazole	25	suppressed
Memantine Hcl	Memantine Hcl	25	11
Myrbetriq	Mirabegron	25	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	25	13
Toujeo Solostar	Insulin Glargine,hum.Rec.Anlog	25	suppressed
Vitamin D2	Ergocalciferol (Vitamin D2)	25	suppressed
Bupropion Hcl Sr	Bupropion Hcl	24	suppressed
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	23	suppressed
Mupirocin	Mupirocin	23	16
Ozempic	Semaglutide	23	suppressed
Promethazine Hcl	Promethazine Hcl	23	suppressed
Valacyclovir	Valacyclovir Hcl	23	11
Ketoconazole	Ketoconazole	22	14
Nitroglycerin	Nitroglycerin	22	11
Phenobarbital	Phenobarbital	22	suppressed
Chlorthalidone	Chlorthalidone	21	suppressed
Cholestyramine	Cholestyramine (With Sugar)	21	suppressed
Clindamycin Hcl	Clindamycin Hcl	21	suppressed
Divalproex Sodium	Divalproex Sodium	21	suppressed
Enalapril Maleate	Enalapril Maleate	21	suppressed
Lidocaine	Lidocaine	21	suppressed
Metformin Hcl Er	Metformin Hcl	21	suppressed
Nebivolol Hcl	Nebivolol Hcl	21	suppressed
Repatha Sureclick	Evolocumab	21	suppressed
Stiolto Respimat	Tiotropium Br/Olodaterol Hcl	21	suppressed
Benazepril Hcl	Benazepril Hcl	20	suppressed
Breo Ellipta	Fluticasone/Vilanterol	20	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	20	suppressed
Farxiga	Dapagliflozin Propanediol	20	suppressed
Lamotrigine	Lamotrigine	20	suppressed
Sildenafil Citrate	Sildenafil Citrate	20	suppressed
Symbicort	Budesonide/Formoterol Fumarate	20	suppressed
Telmisartan	Telmisartan	20	suppressed
Zolpidem Tartrate Er	Zolpidem Tartrate	20	suppressed
Rybelsus	Semaglutide	19	suppressed
Sucralfate	Sucralfate	19	suppressed
Torsemide	Torsemide	19	suppressed
Bumetanide	Bumetanide	18	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	18	suppressed
Ibu	Ibuprofen	18	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	17	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	17	suppressed
Liothyronine Sodium	Liothyronine Sodium	16	suppressed
Omega-3 Acid Ethyl Esters	Omega-3 Acid Ethyl Esters	16	suppressed
Testosterone	Testosterone	16	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	15	suppressed
Bupropion Xl	Bupropion Hcl	15	suppressed
Dextroamphetamine-Amphet Er	Dextroamphetamine/Amphetamine	15	suppressed
Folic Acid	Folic Acid	15	suppressed
Humulin N	Insulin Nph Human Isophane	15	suppressed
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	15	suppressed
Levetiracetam	Levetiracetam	15	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	14	suppressed
Humalog	Insulin Lispro	14	suppressed
Ramipril	Ramipril	14	suppressed
Tradjenta	Linagliptin	14	suppressed
Fenofibrate	Fenofibrate	13	suppressed
Metolazone	Metolazone	13	suppressed
Nifedipine Er	Nifedipine	13	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	13	suppressed
Zaleplon	Zaleplon	13	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	12	suppressed
Armour Thyroid	Thyroid,pork	12	suppressed
Bydureon Bcise	Exenatide Microspheres	12	suppressed
Dabigatran Etexilate	Dabigatran Etexilate Mesylate	12	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	12	suppressed
Flecainide Acetate	Flecainide Acetate	12	suppressed
Gemfibrozil	Gemfibrozil	12	suppressed
Irbesartan	Irbesartan	12	suppressed
Linzess	Linaclotide	12	suppressed
Nadolol	Nadolol	12	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	12	suppressed
Vimpat	Lacosamide	12	suppressed
Advair Hfa	Fluticasone Propion/Salmeterol	11	suppressed
Carbamazepine	Carbamazepine	11	suppressed
Gemtesa	Vibegron	11	suppressed
Humalog Mix 75-25 Kwikpen	Insulin Lispro Protamin/Lispro	11	suppressed
Humulin R	Insulin Regular, Human	11	suppressed
Insulin Lispro	Insulin Lispro	11	suppressed
Insulin Syringe	Syringe And Needle,insulin,1ml	11	suppressed
Nitrofurantoin	Nitrofurantoin Macrocrystal	11	suppressed
Novolin R	Insulin Regular, Human	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	$101.40 · 4 records	Ferring Pharmaceuticals Inc.	ADSTILADRIN, GEMTESA, WATCHMAN FLX	1	—
2024	—	—	—	—	Complete

Questions to ask

Questions you could discuss with your doctor

What role, if any, does Gemtesa play in your treatment recommendations for me?
How do you evaluate evidence when you have a financial relationship with Sumitomo Pharma America, Inc.?
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