Healthcare provider profile · identity verified

Guido Calderon, MD

Internal Medicine · NEW BRAUNFELS, TX · NPI 1720053739

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	517	102
Levothyroxine Sodium	Levothyroxine Sodium	474	84
Amlodipine Besylate	Amlodipine Besylate	404	67
Donepezil Hcl	Donepezil Hcl	361	50
Eliquis	Apixaban	357	61
Pantoprazole Sodium	Pantoprazole Sodium	300	77
Memantine Hcl	Memantine Hcl	268	43
Furosemide	Furosemide	266	89
Trazodone Hcl	Trazodone Hcl	238	48
Potassium Chloride	Potassium Chloride	223	62
Lisinopril	Lisinopril	214	40
Gabapentin	Gabapentin	212	44
Metoprolol Tartrate	Metoprolol Tartrate	193	41
Escitalopram Oxalate	Escitalopram Oxalate	182	34
Tamsulosin Hcl	Tamsulosin Hcl	182	34
Sertraline Hcl	Sertraline Hcl	175	36
Metformin Hcl	Metformin Hcl	169	30
Tramadol Hcl	Tramadol Hcl	164	68
Losartan Potassium	Losartan Potassium	151	40
Metoprolol Succinate	Metoprolol Succinate	144	43
Fluticasone Propionate	Fluticasone Propionate	134	33
Omeprazole	Omeprazole	130	29
Carvedilol	Carvedilol	125	25
Montelukast Sodium	Montelukast Sodium	125	19
Mirtazapine	Mirtazapine	123	32
Divalproex Sodium	Divalproex Sodium	119	16
Simvastatin	Simvastatin	116	14
Xarelto	Rivaroxaban	116	19
Levetiracetam	Levetiracetam	107	17
Lorazepam	Lorazepam	94	26
Clopidogrel	Clopidogrel Bisulfate	93	28
Famotidine	Famotidine	93	39
Duloxetine Hcl	Duloxetine Hcl	91	17
Fluoxetine Hcl	Fluoxetine Hcl	90	suppressed
Pravastatin Sodium	Pravastatin Sodium	87	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	78	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	77	suppressed
Amiodarone Hcl	Amiodarone Hcl	74	28
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	72	12
Hydrochlorothiazide	Hydrochlorothiazide	71	12
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	71	51
Prednisone	Prednisone	70	33
Spironolactone	Spironolactone	69	26
Buspirone Hcl	Buspirone Hcl	66	13
Myrbetriq	Mirabegron	66	suppressed
Cefuroxime	Cefuroxime Axetil	63	56
Quetiapine Fumarate	Quetiapine Fumarate	60	17
Hydralazine Hcl	Hydralazine Hcl	58	18
Oxcarbazepine	Oxcarbazepine	57	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	56	suppressed
Lacosamide	Lacosamide	53	suppressed
Risperidone	Risperidone	52	suppressed
Ondansetron Hcl	Ondansetron Hcl	50	37
Clonazepam	Clonazepam	47	suppressed
Latanoprost	Latanoprost	46	13
Oxybutynin Chloride	Oxybutynin Chloride	46	suppressed
Xifaxan	Rifaximin	44	suppressed
Alendronate Sodium	Alendronate Sodium	43	suppressed
Glimepiride	Glimepiride	43	suppressed
Lactulose	Lactulose	41	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	41	13
Memantine Hcl Er	Memantine Hcl	41	suppressed
Midodrine Hcl	Midodrine Hcl	41	13
Rivastigmine	Rivastigmine	41	suppressed
Propranolol Hcl	Propranolol Hcl	40	suppressed
Divalproex Sodium Er	Divalproex Sodium	39	suppressed
Topiramate	Topiramate	39	suppressed
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	38	16
Valsartan	Valsartan	38	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	36	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	36	15
Bumetanide	Bumetanide	35	12
Celecoxib	Celecoxib	35	11
Finasteride	Finasteride	35	suppressed
Meloxicam	Meloxicam	35	suppressed
Oseltamivir Phosphate	Oseltamivir Phosphate	35	34
Digoxin	Digoxin	34	suppressed
Diltiazem Hcl	Diltiazem Hcl	32	suppressed
Levofloxacin	Levofloxacin	31	25
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	30	28
Cefdinir	Cefdinir	30	25
Pregabalin	Pregabalin	30	suppressed
Albuterol Sulfate Hfa	Albuterol Sulfate	29	suppressed
Citalopram Hbr	Citalopram Hydrobromide	29	suppressed
Diltiazem 24hr Er (Xr)	Diltiazem Hcl	28	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	28	suppressed
Sucralfate	Sucralfate	28	suppressed
Baclofen	Baclofen	27	suppressed
Methenamine Hippurate	Methenamine Hippurate	27	suppressed
Rosuvastatin Calcium	Rosuvastatin Calcium	27	11
Temazepam	Temazepam	27	suppressed
Alprazolam	Alprazolam	26	suppressed
Nitrofurantoin	Nitrofurantoin Macrocrystal	26	suppressed
Ropinirole Hcl	Ropinirole Hcl	26	suppressed
Bydureon Bcise	Exenatide Microspheres	25	suppressed
Labetalol Hcl	Labetalol Hcl	25	suppressed
Erythromycin	Erythromycin Base	24	suppressed
Methocarbamol	Methocarbamol	24	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	24	suppressed
Amantadine	Amantadine Hcl	23	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	23	suppressed
Lurasidone Hcl	Lurasidone Hcl	23	suppressed
Nystop	Nystatin	23	14
Trulicity	Dulaglutide	23	suppressed
Vitamin D2	Ergocalciferol (Vitamin D2)	23	suppressed
Brimonidine Tartrate	Brimonidine Tartrate	22	suppressed
Clonidine Hcl	Clonidine Hcl	22	suppressed
Desmopressin Acetate	Desmopressin Acetate	22	suppressed
Ondansetron Odt	Ondansetron	22	17
Cholestyramine	Cholestyramine (With Sugar)	21	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	21	suppressed
Nystatin	Nystatin	21	17
Venlafaxine Hcl	Venlafaxine Hcl	21	suppressed
Allopurinol	Allopurinol	20	suppressed
Glipizide Er	Glipizide	20	suppressed
Ketoconazole	Ketoconazole	20	suppressed
Sodium Chloride	0.9 % Sodium Chloride	20	12
Bethanechol Chloride	Bethanechol Chloride	19	suppressed
Olanzapine	Olanzapine	19	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	18	15
Meclizine Hcl	Meclizine Hcl	18	suppressed
Nifedipine Er	Nifedipine	18	suppressed
Valproic Acid	Valproic Acid (As Sodium Salt)	18	suppressed
Azelastine Hcl	Azelastine Hcl	17	suppressed
Cephalexin	Cephalexin	17	13
Doxycycline Hyclate	Doxycycline Hyclate	17	11
Ezetimibe	Ezetimibe	17	suppressed
Rytary	Carbidopa/Levodopa	17	suppressed
Amlodipine-Valsartan	Amlodipine Besylate/Valsartan	16	suppressed
Bupropion Xl	Bupropion Hcl	16	suppressed
Carbamazepine Er	Carbamazepine	16	suppressed
Linzess	Linaclotide	16	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	16	suppressed
Tradjenta	Linagliptin	16	suppressed
Bupropion Hcl Sr	Bupropion Hcl	15	suppressed
Clobazam	Clobazam	15	suppressed
Doxepin Hcl	Doxepin Hcl	15	suppressed
Fludrocortisone Acetate	Fludrocortisone Acetate	15	suppressed
Ipratropium Bromide	Ipratropium Bromide	15	suppressed
Isosorbide Dinitrate	Isosorbide Dinitrate	15	suppressed
Ranolazine Er	Ranolazine	15	suppressed
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	14	suppressed
Mupirocin	Mupirocin	14	suppressed
Nuedexta	Dextromethorphan Hbr/Quinidine	14	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	14	suppressed
Vraylar	Cariprazine Hcl	14	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	13	suppressed
Amoxicillin	Amoxicillin	13	11
Anastrozole	Anastrozole	13	suppressed
Azithromycin	Azithromycin	13	13
Nateglinide	Nateglinide	13	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	13	suppressed
Nitroglycerin	Nitroglycerin	13	13
Solifenacin Succinate	Solifenacin Succinate	13	suppressed
Zenpep	Lipase/Protease/Amylase	13	suppressed
Auryxia	Ferric Citrate	12	suppressed
Diclofenac Sodium	Diclofenac Sodium	12	suppressed
Glipizide	Glipizide	12	suppressed
Riluzole	Riluzole	12	suppressed
Roflumilast	Roflumilast	12	suppressed
Tizanidine Hcl	Tizanidine Hcl	12	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	12	suppressed
Xtandi	Enzalutamide	12	suppressed
Letrozole	Letrozole	11	suppressed
Lidocaine-Prilocaine	Lidocaine/Prilocaine	11	suppressed
Lithium Carbonate	Lithium Carbonate	11	suppressed
Methimazole	Methimazole	11	suppressed
Nebivolol Hcl	Nebivolol Hcl	11	suppressed
Omega-3 Acid Ethyl Esters	Omega-3 Acid Ethyl Esters	11	suppressed
Sevelamer Carbonate	Sevelamer Carbonate	11	suppressed
Teflaro	Ceftaroline Fosamil Acetate	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