Healthcare provider profile · identity verified

Cathy A Castillo, MD

Family Practice · PFLUGERVILLE, TX · NPI 1295787778

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	713	212
Levothyroxine Sodium	Levothyroxine Sodium	462	142
Amlodipine Besylate	Amlodipine Besylate	409	118
Lisinopril	Lisinopril	302	83
Losartan Potassium	Losartan Potassium	261	84
Metformin Hcl Er	Metformin Hcl	242	70
Rosuvastatin Calcium	Rosuvastatin Calcium	231	76
Montelukast Sodium	Montelukast Sodium	211	73
Gabapentin	Gabapentin	196	62
Duloxetine Hcl	Duloxetine Hcl	188	54
Omeprazole	Omeprazole	182	65
Metformin Hcl	Metformin Hcl	162	55
Metoprolol Succinate	Metoprolol Succinate	158	46
Hydrochlorothiazide	Hydrochlorothiazide	146	47
Jardiance	Empagliflozin	140	32
Escitalopram Oxalate	Escitalopram Oxalate	138	41
Pantoprazole Sodium	Pantoprazole Sodium	136	42
Simvastatin	Simvastatin	125	44
Trazodone Hcl	Trazodone Hcl	119	37
Fluticasone Propionate	Fluticasone Propionate	114	45
Bupropion Xl	Bupropion Hcl	109	30
Azelastine Hcl	Azelastine Hcl	108	64
Ozempic	Semaglutide	107	22
Pravastatin Sodium	Pravastatin Sodium	95	34
Furosemide	Furosemide	94	33
Sertraline Hcl	Sertraline Hcl	92	26
Pioglitazone Hcl	Pioglitazone Hcl	87	24
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	81	25
Alendronate Sodium	Alendronate Sodium	80	31
Glipizide	Glipizide	80	26
Tamsulosin Hcl	Tamsulosin Hcl	79	20
Meloxicam	Meloxicam	76	27
Estradiol	Estradiol	73	41
Potassium Chloride	Potassium Chloride	73	28
Carvedilol	Carvedilol	71	23
Albuterol Sulfate Hfa	Albuterol Sulfate	68	33
Januvia	Sitagliptin Phosphate	68	12
Lovastatin	Lovastatin	68	15
Eliquis	Apixaban	66	18
Glipizide Er	Glipizide	65	24
Atenolol	Atenolol	62	18
Synthroid	Levothyroxine Sodium	61	23
Pregabalin	Pregabalin	58	31
Venlafaxine Hcl Er	Venlafaxine Hcl	58	15
Allopurinol	Allopurinol	56	19
Celecoxib	Celecoxib	51	18
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	50	15
Citalopram Hbr	Citalopram Hydrobromide	49	12
Buspirone Hcl	Buspirone Hcl	48	24
Donepezil Hcl	Donepezil Hcl	48	19
Zolpidem Tartrate	Zolpidem Tartrate	48	12
Triamcinolone Acetonide	Triamcinolone Acetonide	43	33
Famotidine	Famotidine	42	18
Mirtazapine	Mirtazapine	41	12
Olmesartan Medoxomil	Olmesartan Medoxomil	41	13
Ezetimibe	Ezetimibe	40	16
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	40	14
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	36	13
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	35	suppressed
Metoprolol Tartrate	Metoprolol Tartrate	35	15
Valsartan	Valsartan	35	suppressed
Clopidogrel	Clopidogrel Bisulfate	34	16
Amitriptyline Hcl	Amitriptyline Hcl	33	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	33	30
Ibandronate Sodium	Ibandronate Sodium	33	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	33	15
Hydralazine Hcl	Hydralazine Hcl	32	13
Toujeo Max Solostar	Insulin Glargine,hum.Rec.Anlog	32	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	31	31
Nifedipine Er	Nifedipine	30	suppressed
Benazepril Hcl	Benazepril Hcl	28	suppressed
Mounjaro	Tirzepatide	28	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	27	12
Telmisartan	Telmisartan	27	suppressed
Aripiprazole	Aripiprazole	26	suppressed
Clobetasol Propionate	Clobetasol Propionate	26	19
Prednisone	Prednisone	26	22
Tizanidine Hcl	Tizanidine Hcl	26	11
Irbesartan	Irbesartan	25	suppressed
Clonazepam	Clonazepam	24	suppressed
Ropinirole Hcl	Ropinirole Hcl	24	suppressed
Diclofenac Sodium	Diclofenac Sodium	23	13
Fenofibrate	Fenofibrate	23	suppressed
Rexulti	Brexpiprazole	23	suppressed
Propranolol Hcl	Propranolol Hcl	22	suppressed
Finasteride	Finasteride	21	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	20	suppressed
Valacyclovir	Valacyclovir Hcl	19	12
Ipratropium Bromide	Ipratropium Bromide	18	suppressed
Levetiracetam	Levetiracetam	18	suppressed
Shingrix	Varicella-Zoster Ge/As01b/Pf	18	18
Spironolactone	Spironolactone	18	suppressed
Ultra-Fine Short Pen Needle	Pen Needle, Diabetic	18	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	17	suppressed
Ondansetron Hcl	Ondansetron Hcl	17	suppressed
Ondansetron Odt	Ondansetron	17	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	17	suppressed
Soliqua 100-33	Insulin Glargine/Lixisenatide	17	suppressed
Azithromycin	Azithromycin	16	16
Belsomra	Suvorexant	16	suppressed
Glimepiride	Glimepiride	16	suppressed
Memantine Hcl	Memantine Hcl	16	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	16	suppressed
Trulicity	Dulaglutide	16	suppressed
Xarelto	Rivaroxaban	16	suppressed
Breo Ellipta	Fluticasone/Vilanterol	15	suppressed
Bupropion Hcl Sr	Bupropion Hcl	15	suppressed
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	15	suppressed
Janumet	Sitagliptin Phos/Metformin Hcl	15	suppressed
Lorazepam	Lorazepam	15	suppressed
Myrbetriq	Mirabegron	15	suppressed
Rivastigmine	Rivastigmine	15	suppressed
Terbinafine Hcl	Terbinafine Hcl	15	13
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	15	suppressed
Ibuprofen	Ibuprofen	14	suppressed
Primidone	Primidone	14	suppressed
Spiriva Handihaler	Tiotropium Bromide	14	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	14	suppressed
Farxiga	Dapagliflozin Propanediol	13	suppressed
Gemfibrozil	Gemfibrozil	13	suppressed
Tradjenta	Linagliptin	13	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	12	suppressed
Metronidazole	Metronidazole	12	suppressed
Symbicort	Budesonide/Formoterol Fumarate	12	suppressed
Torsemide	Torsemide	12	suppressed
Verapamil Er	Verapamil Hcl	12	suppressed
Dulera	Mometasone/Formoterol	11	suppressed
Nebivolol Hcl	Nebivolol Hcl	11	suppressed
Nystatin	Nystatin	11	suppressed
Spiriva Respimat	Tiotropium Bromide	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