Healthcare provider profile · identity verified

Gary Alan Calhoun, MD

Allopathic & Osteopathic Physicians|Family Medicine · ALBERTVILLE, AL · NPI 1083687990

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 Gary Alan Calhoun, MD received $164.51 in general payments during 2025 across 2 reported records.

Alpha Cognition USA, Inc. accounted for 84.2% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 2 associated products.

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

Otsuka America Pharmaceutical, 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 NUEDEXTA as an associated drug or biological on 393 records involving 285 distinct recipient NPIs. Public Medicare Part D data also shows 48 claims for Nuedexta by this doctor in 2024.

Otsuka America Pharmaceutical, 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 REXULTI as an associated drug or biological on 160756 records involving 46288 distinct recipient NPIs. Public Medicare Part D data also shows 35 claims for Rexulti by this doctor in 2024.

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

Payment overview · 2025

General Payments

$164.51

2 reported records · 2 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
Alpha Cognition USA, Inc.	Unresolved — no canonical attribution shown	$138.47	84.2%	1	2025
Otsuka America Pharmaceutical, Inc.	Unresolved — no canonical attribution shown	$26.04	15.8%	1	2025

What were the payments for?

Payment categories

Category	Amount	Records
Food and Beverage	$164.51	2

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
Zunveyl Normalized: zunveyl	Drug	Alpha Cognition USA, Inc.	$138.47	1	2025
Source payment records 2025-10-01 · Alpha Cognition USA, Inc. · $138.47 · Open Payments source
REXULTI Normalized: rexulti	Drug	Otsuka America Pharmaceutical, Inc.	$26.04	1	2025
Source payment records 2025-04-17 · Otsuka America Pharmaceutical, Inc. · $26.04 · 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
REXULTI rexulti	2025	Rexulti	2024	35 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
Otsuka America Pharmaceutical, Inc. Exact reporting entity; no affiliate inference	2025	NUEDEXTA open payments reported associated product	CMS Open Payments — General Payments 393 supporting records · 285 recipient NPIs · example record 1227268901	Nuedexta · 2024 Exact normalized brand match · 1 Part D row	48	suppressed by CMS
Otsuka America Pharmaceutical, Inc. Exact reporting entity; no affiliate inference	2025	REXULTI open payments reported associated product	CMS Open Payments — General Payments 160756 supporting records · 46288 recipient NPIs · example record 1227267708	Rexulti · 2024 Exact normalized brand match · 1 Part D row	35	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
Eliquis	Apixaban	1078	107
Levothyroxine Sodium	Levothyroxine Sodium	920	126
Atorvastatin Calcium	Atorvastatin Calcium	838	128
Furosemide	Furosemide	695	126
Gabapentin	Gabapentin	645	100
Pantoprazole Sodium	Pantoprazole Sodium	605	120
Amlodipine Besylate	Amlodipine Besylate	574	94
Potassium Chloride	Potassium Chloride	569	109
Trazodone Hcl	Trazodone Hcl	562	86
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	548	139
Omeprazole	Omeprazole	503	77
Famotidine	Famotidine	481	76
Lisinopril	Lisinopril	478	79
Mirtazapine	Mirtazapine	440	79
Donepezil Hcl	Donepezil Hcl	409	74
Tamsulosin Hcl	Tamsulosin Hcl	362	57
Escitalopram Oxalate	Escitalopram Oxalate	328	45
Metoprolol Succinate	Metoprolol Succinate	326	59
Duloxetine Hcl	Duloxetine Hcl	317	52
Sucralfate	Sucralfate	308	37
Losartan Potassium	Losartan Potassium	291	50
Divalproex Sodium	Divalproex Sodium	272	53
Sertraline Hcl	Sertraline Hcl	266	47
Metformin Hcl	Metformin Hcl	264	42
Clopidogrel	Clopidogrel Bisulfate	259	44
Buspirone Hcl	Buspirone Hcl	253	53
Carvedilol	Carvedilol	243	49
Lorazepam	Lorazepam	234	54
Montelukast Sodium	Montelukast Sodium	228	38
Memantine Hcl	Memantine Hcl	225	41
Quetiapine Fumarate	Quetiapine Fumarate	218	65
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	212	81
Ondansetron Hcl	Ondansetron Hcl	209	74
Clonazepam	Clonazepam	207	32
Gemtesa	Vibegron	204	17
Metoprolol Tartrate	Metoprolol Tartrate	196	43
Levetiracetam	Levetiracetam	185	32
Topiramate	Topiramate	181	20
Citalopram Hbr	Citalopram Hydrobromide	166	29
Fluticasone Propionate	Fluticasone Propionate	164	45
Oxycodone Hcl	Oxycodone Hcl	152	17
Tramadol Hcl	Tramadol Hcl	150	39
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	146	32
Simvastatin	Simvastatin	146	31
Nystatin	Nystatin	144	69
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	134	25
Jardiance	Empagliflozin	133	13
Myrbetriq	Mirabegron	125	12
Ceftriaxone	Ceftriaxone Sodium	124	76
Pravastatin Sodium	Pravastatin Sodium	119	22
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	116	21
Lidocaine Hcl	Lidocaine Hcl	111	79
Prednisone	Prednisone	110	37
Rosuvastatin Calcium	Rosuvastatin Calcium	110	23
Alprazolam	Alprazolam	109	20
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	108	81
Latanoprost	Latanoprost	106	22
Aripiprazole	Aripiprazole	100	15
Ropinirole Hcl	Ropinirole Hcl	99	21
Atenolol	Atenolol	97	12
Fluoxetine Hcl	Fluoxetine Hcl	97	18
Baclofen	Baclofen	96	18
Spironolactone	Spironolactone	95	24
Januvia	Sitagliptin Phosphate	90	suppressed
Memantine Hcl Er	Memantine Hcl	90	11
Xarelto	Rivaroxaban	90	suppressed
Nitrofurantoin	Nitrofurantoin Macrocrystal	89	32
Lamotrigine	Lamotrigine	87	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	86	16
Hydrochlorothiazide	Hydrochlorothiazide	85	19
Tizanidine Hcl	Tizanidine Hcl	82	11
Diclofenac Sodium	Diclofenac Sodium	80	26
Bupropion Xl	Bupropion Hcl	79	13
Allopurinol	Allopurinol	78	16
Sodium Chloride	0.9 % Sodium Chloride	77	35
Amiodarone Hcl	Amiodarone Hcl	75	14
Doxepin Hcl	Doxepin Hcl	74	13
Risperidone	Risperidone	73	17
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	73	52
Pregabalin	Pregabalin	72	12
Humalog Kwikpen U-100	Insulin Lispro	70	22
Doxycycline Hyclate	Doxycycline Hyclate	69	54
Finasteride	Finasteride	69	suppressed
Fluconazole	Fluconazole	69	55
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	69	41
Celecoxib	Celecoxib	68	12
Linzess	Linaclotide	68	suppressed
Meloxicam	Meloxicam	68	16
Desvenlafaxine Succinate Er	Desvenlafaxine Succinate	65	suppressed
Hydralazine Hcl	Hydralazine Hcl	63	20
Trulicity	Dulaglutide	63	suppressed
Alendronate Sodium	Alendronate Sodium	62	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	62	48
Hydroxyzine Hcl	Hydroxyzine Hcl	62	18
Olanzapine	Olanzapine	62	13
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	61	12
Triamcinolone Acetonide	Triamcinolone Acetonide	61	23
Lacosamide	Lacosamide	60	suppressed
Digoxin	Digoxin	59	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	59	15
Methenamine Hippurate	Methenamine Hippurate	58	11
Ezetimibe	Ezetimibe	57	12
Meclizine Hcl	Meclizine Hcl	56	12
Fenofibrate	Fenofibrate	55	suppressed
Levofloxacin	Levofloxacin	54	47
Primidone	Primidone	54	suppressed
Sevelamer Carbonate	Sevelamer Carbonate	54	suppressed
Cefdinir	Cefdinir	52	48
Oxybutynin Chloride	Oxybutynin Chloride	52	15
Divalproex Sodium Er	Divalproex Sodium	51	suppressed
Valsartan	Valsartan	51	13
Abrysvo	Rsv Vacc, Pref A And Pref B/Pf	50	50
Bumetanide	Bumetanide	50	suppressed
Hydroxyzine Pamoate	Hydroxyzine Pamoate	50	suppressed
Temazepam	Temazepam	50	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	48	12
Nuedexta	Dextromethorphan Hbr/Quinidine	48	suppressed
Promethazine Hcl	Promethazine Hcl	47	suppressed
Glipizide	Glipizide	46	suppressed
Carbamazepine	Carbamazepine	45	suppressed
Fentanyl	Fentanyl	45	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	44	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	43	suppressed
Solifenacin Succinate	Solifenacin Succinate	43	suppressed
Clonidine Hcl	Clonidine Hcl	42	18
Fluvoxamine Maleate	Fluvoxamine Maleate	42	suppressed
Mupirocin	Mupirocin	42	30
Terazosin Hcl	Terazosin Hcl	42	suppressed
Cephalexin	Cephalexin	41	28
Incruse Ellipta	Umeclidinium Bromide	40	suppressed
Nystop	Nystatin	40	21
Diazepam	Diazepam	39	suppressed
Entresto	Sacubitril/Valsartan	39	suppressed
Ertapenem	Ertapenem Sodium	39	27
Lovastatin	Lovastatin	38	suppressed
Oxcarbazepine	Oxcarbazepine	38	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	38	suppressed
Azithromycin	Azithromycin	37	33
Hydrocortisone	Hydrocortisone	37	suppressed
Morphine Sulfate	Morphine Sulfate	37	23
Nuplazid	Pimavanserin Tartrate	37	suppressed
Torsemide	Torsemide	37	suppressed
Amoxicillin	Amoxicillin	36	30
Morphine Sulfate Er	Morphine Sulfate	36	suppressed
Methocarbamol	Methocarbamol	35	suppressed
Ozempic	Semaglutide	35	suppressed
Rexulti	Brexpiprazole	35	suppressed
Warfarin Sodium	Warfarin Sodium	35	suppressed
Diltiazem Hcl	Diltiazem Hcl	34	suppressed
Dutasteride	Dutasteride	34	suppressed
Enulose	Lactulose	34	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	34	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	34	suppressed
Methotrexate	Methotrexate Sodium	34	suppressed
Lurasidone Hcl	Lurasidone Hcl	33	suppressed
Oseltamivir Phosphate	Oseltamivir Phosphate	33	33
Dexamethasone Sodium Phosphate	Dexamethasone Sodium Phosphate	32	22
Estradiol	Estradiol	32	suppressed
Ibuprofen	Ibuprofen	32	16
Restasis	Cyclosporine	32	suppressed
Midodrine Hcl	Midodrine Hcl	31	suppressed
Nebivolol Hcl	Nebivolol Hcl	31	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	30	suppressed
Brimonidine Tartrate-Timolol	Brimonidine Tartrate/Timolol	30	suppressed
Glimepiride	Glimepiride	30	suppressed
Breyna	Budesonide/Formoterol Fumarate	29	suppressed
Lansoprazole	Lansoprazole	29	suppressed
Benztropine Mesylate	Benztropine Mesylate	28	suppressed
Chlorhexidine Gluconate	Chlorhexidine Gluconate	28	suppressed
Farxiga	Dapagliflozin Propanediol	28	suppressed
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	28	12
Dicyclomine Hcl	Dicyclomine Hcl	27	suppressed
Novolin R	Insulin Regular, Human	27	suppressed
Rivastigmine	Rivastigmine Tartrate	27	suppressed
Colesevelam Hcl	Colesevelam Hcl	26	suppressed
Nifedipine Er	Nifedipine	26	suppressed
Cyclosporine	Cyclosporine	25	suppressed
Humulin R	Insulin Regular, Human	25	suppressed
Isosorbide Dinitrate	Isosorbide Dinitrate	25	suppressed
Albuterol Sulfate Hfa	Albuterol Sulfate	24	14
Clindamycin Hcl	Clindamycin Hcl	24	19
Lactulose	Lactulose	24	suppressed
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	24	suppressed
Lidocaine	Lidocaine	24	suppressed
Ranolazine Er	Ranolazine	24	suppressed
Brimonidine Tartrate	Brimonidine Tartrate	23	suppressed
Meropenem	Meropenem	23	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	23	suppressed
Ssd	Silver Sulfadiazine	23	suppressed
Calcitriol	Calcitriol	22	suppressed
Clonidine	Clonidine	22	suppressed
Haloperidol	Haloperidol	22	suppressed
Linezolid	Linezolid	22	18
Propranolol Hcl	Propranolol Hcl	22	suppressed
Santyl	Collagenase Clostridium Hist.	22	14
Novolog Flexpen	Insulin Aspart	21	suppressed
Scopolamine	Scopolamine	21	suppressed
Clobetasol Propionate	Clobetasol Propionate	20	suppressed
Fluticasone Propionate Hfa	Fluticasone Propionate	20	suppressed
Lubiprostone	Lubiprostone	20	suppressed
Paroxetine Hcl	Paroxetine Hcl	20	suppressed
Sotalol	Sotalol Hcl	20	suppressed
Budesonide	Budesonide	19	suppressed
Gentamicin Sulfate	Gentamicin Sulfate	19	suppressed
Rivastigmine	Rivastigmine	19	suppressed
Timolol Maleate	Timolol Maleate	19	suppressed
Albuterol Sulfate	Albuterol Sulfate	18	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	18	suppressed
Clemastine Fumarate	Clemastine Fumarate	18	17
Lokelma	Sodium Zirconium Cyclosilicate	18	suppressed
Oxycontin	Oxycodone Hcl	18	suppressed
Valacyclovir	Valacyclovir Hcl	18	suppressed
Eszopiclone	Eszopiclone	17	suppressed
Glycopyrrolate	Glycopyrrolate	17	suppressed
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	17	suppressed
Metformin Hcl Er	Metformin Hcl	17	suppressed
Propranolol Hcl Er	Propranolol Hcl	17	suppressed
Dorzolamide Hcl	Dorzolamide Hcl	16	suppressed
Ketoconazole	Ketoconazole	16	suppressed
Methylprednisolone	Methylprednisolone	16	15
Metoclopramide Hcl	Metoclopramide Hcl	16	suppressed
Nystatin-Triamcinolone	Nystatin/Triamcinolone Acet	16	suppressed
Xcopri	Cenobamate	16	suppressed
Ziprasidone Hcl	Ziprasidone Hcl	16	suppressed
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	15	suppressed
Dorzolamide-Timolol	Dorzolamide Hcl/Timolol Maleat	15	suppressed
Metolazone	Metolazone	15	11
Ramipril	Ramipril	15	suppressed
Colchicine	Colchicine	14	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	14	suppressed
Fesoterodine Fumarate Er	Fesoterodine Fumarate	14	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	14	suppressed
Haloperidol Lactate	Haloperidol Lactate	14	suppressed
Mounjaro	Tirzepatide	14	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	14	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	13	suppressed
Bupropion Hcl Sr	Bupropion Hcl	13	suppressed
Daptomycin	Daptomycin	13	suppressed
Humulin 70-30	Insulin Nph Hum/Reg Insulin Hm	13	suppressed
Ingrezza	Valbenazine Tosylate	13	suppressed
Invega Sustenna	Paliperidone Palmitate	13	suppressed
Labetalol Hcl	Labetalol Hcl	13	suppressed
Lumigan	Bimatoprost	13	suppressed
Methadone Hcl	Methadone Hcl	13	suppressed
Olanzapine Odt	Olanzapine	13	suppressed
Theophylline Er	Theophylline Anhydrous	13	suppressed
Tresiba	Insulin Degludec	13	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	13	suppressed
Alfuzosin Hcl Er	Alfuzosin Hcl	12	suppressed
Amlodipine-Olmesartan	Amlodipine Bes/Olmesartan Med	12	suppressed
Breztri Aerosphere	Budesonide/Glycopyr/Formoterol	12	suppressed
Cefepime Hcl	Cefepime Hcl	12	suppressed
Combigan	Brimonidine Tartrate/Timolol	12	suppressed
Janumet Xr	Sitagliptin Phos/Metformin Hcl	12	suppressed
Novolin R Flexpen	Insulin Regular, Human	12	suppressed
Ondansetron Hcl	Ondansetron Hcl/Pf	12	suppressed
Otezla	Apremilast	12	suppressed
Dabigatran Etexilate	Dabigatran Etexilate Mesylate	11	suppressed
Dextroamphetamine Sulfate	Dextroamphetamine Sulfate	11	suppressed
Insulin Degludec	Insulin Degludec	11	suppressed
Klor-Con	Potassium Chloride	11	suppressed
Letrozole	Letrozole	11	suppressed
Nitroglycerin	Nitroglycerin	11	11
Prazosin Hcl	Prazosin Hcl	11	suppressed
Prednisolone Acetate	Prednisolone Acetate	11	suppressed
Premarin	Estrogens, Conjugated	11	suppressed
Risedronate Sodium	Risedronate Sodium	11	suppressed
Tobramycin-Dexamethasone	Tobramycin/Dexamethasone	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	$164.51 · 2 records	Alpha Cognition USA, Inc.	REXULTI, Zunveyl	2	—
2024	—	—	—	—	Complete

Questions to ask

Questions you could discuss with your doctor

What role, if any, does Rexulti play in your treatment recommendations for me?
How do you evaluate evidence when you have a financial relationship with Otsuka America Pharmaceutical, 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