Healthcare provider profile · identity verified

James A. Siy, MD

Internal Medicine · FOLSOM, CA · NPI 1811075591

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	413	142
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	397	53
Amlodipine Besylate	Amlodipine Besylate	355	117
Lisinopril	Lisinopril	277	101
Levothyroxine Sodium	Levothyroxine Sodium	274	95
Albuterol Sulfate Hfa	Albuterol Sulfate	203	81
Losartan Potassium	Losartan Potassium	181	64
Tamsulosin Hcl	Tamsulosin Hcl	177	63
Hydrochlorothiazide	Hydrochlorothiazide	164	61
Gabapentin	Gabapentin	136	53
Ibuprofen	Ibuprofen	129	42
Metoprolol Tartrate	Metoprolol Tartrate	129	44
Furosemide	Furosemide	127	51
Omeprazole	Omeprazole	123	37
Trazodone Hcl	Trazodone Hcl	121	40
Fluticasone Propionate	Fluticasone Propionate	108	44
Atenolol	Atenolol	106	36
Metoprolol Succinate	Metoprolol Succinate	101	34
Doxycycline Monohydrate	Doxycycline Monohydrate	89	60
Pantoprazole Sodium	Pantoprazole Sodium	89	30
Simvastatin	Simvastatin	89	31
Famotidine	Famotidine	87	28
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	87	30
Ondansetron Hcl	Ondansetron Hcl	80	11
Paxlovid	Nirmatrelvir/Ritonavir	80	80
Zolpidem Tartrate	Zolpidem Tartrate	78	14
Allopurinol	Allopurinol	77	27
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	74	suppressed
Meloxicam	Meloxicam	73	26
Rosuvastatin Calcium	Rosuvastatin Calcium	72	26
Wixela Inhub	Fluticasone Propion/Salmeterol	72	21
Lorazepam	Lorazepam	70	17
Alvesco	Ciclesonide	65	24
Metformin Hcl	Metformin Hcl	62	23
Clonazepam	Clonazepam	61	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	59	53
Clopidogrel	Clopidogrel Bisulfate	58	18
Tizanidine Hcl	Tizanidine Hcl	58	29
Finasteride	Finasteride	57	17
Glipizide	Glipizide	57	19
Fluoxetine Hcl	Fluoxetine Hcl	54	19
Ondansetron Odt	Ondansetron	54	suppressed
Naproxen	Naproxen	53	18
Carvedilol	Carvedilol	51	18
Acyclovir	Acyclovir	50	20
Metformin Hcl Er	Metformin Hcl	50	19
Escitalopram Oxalate	Escitalopram Oxalate	48	15
Alprazolam	Alprazolam	46	suppressed
Bupropion Xl	Bupropion Hcl	46	11
Montelukast Sodium	Montelukast Sodium	46	18
Hydroxyzine Hcl	Hydroxyzine Hcl	45	11
Terazosin Hcl	Terazosin Hcl	44	14
Cefadroxil	Cefadroxil	42	35
Cefpodoxime Proxetil	Cefpodoxime Proxetil	42	29
Cephalexin	Cephalexin	42	35
Duloxetine Hcl	Duloxetine Hcl	42	16
Prednisone	Prednisone	42	26
Temazepam	Temazepam	42	suppressed
Alendronate Sodium	Alendronate Sodium	41	18
Morphine Sulfate Er	Morphine Sulfate	40	suppressed
Citalopram Hbr	Citalopram Hydrobromide	38	14
Diazepam	Diazepam	37	suppressed
Oxycontin	Oxycodone Hcl	37	suppressed
Potassium Chloride	Potassium Chloride	35	15
Spiriva Respimat	Tiotropium Bromide	35	12
Buspirone Hcl	Buspirone Hcl	34	suppressed
Colchicine	Colchicine	34	20
Azithromycin	Azithromycin	33	33
Sertraline Hcl	Sertraline Hcl	32	13
Venlafaxine Hcl Er	Venlafaxine Hcl	32	12
Warfarin Sodium	Warfarin Sodium	32	13
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	31	27
Adacel Tdap	Diph,pertuss(Acell),tet Vac/Pf	30	30
Pradaxa	Dabigatran Etexilate Mesylate	30	18
Pregabalin	Pregabalin	29	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	28	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	28	18
Clobetasol Propionate	Clobetasol Propionate	27	12
Fluocinonide	Fluocinonide	27	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	26	suppressed
Butalbital-Acetaminophen	Butalbital/Acetaminophen	25	suppressed
Lovastatin	Lovastatin	25	suppressed
Lactulose	Lactulose	24	suppressed
Azelastine Hcl	Azelastine Hcl	22	11
Eliquis	Apixaban	22	suppressed
Jardiance	Empagliflozin	22	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	22	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	22	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	22	15
Amoxicillin	Amoxicillin	21	15
Nabumetone	Nabumetone	20	12
Oxybutynin Chloride Er	Oxybutynin Chloride	20	suppressed
Promethazine Hcl	Promethazine Hcl	20	suppressed
Baclofen	Baclofen	19	suppressed
Donepezil Hcl	Donepezil Hcl	19	suppressed
Glipizide Er	Glipizide	19	suppressed
Ipratropium Bromide	Ipratropium Bromide	18	suppressed
Nystatin	Nystatin	18	suppressed
Bupropion Hcl Sr	Bupropion Hcl	17	suppressed
Hydralazine Hcl	Hydralazine Hcl	17	suppressed
Naloxone Hcl	Naloxone Hcl	17	17
Trospium Chloride	Trospium Chloride	17	suppressed
Clindamycin Phosphate	Clindamycin Phosphate	16	suppressed
Estradiol	Estradiol	16	suppressed
Fenofibrate	Fenofibrate	16	suppressed
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	16	suppressed
Tramadol Hcl	Tramadol Hcl	16	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	15	suppressed
Varenicline Tartrate	Varenicline Tartrate	15	suppressed
Clindamycin Hcl	Clindamycin Hcl	14	12
Clonidine Hcl	Clonidine Hcl	14	suppressed
Metronidazole	Metronidazole	14	suppressed
Ofloxacin	Ofloxacin	14	14
Ozempic	Semaglutide	14	suppressed
Propranolol Hcl	Propranolol Hcl	14	suppressed
Propranolol Hcl Er	Propranolol Hcl	14	suppressed
Valacyclovir	Valacyclovir Hcl	14	suppressed
Humulin N	Insulin Nph Human Isophane	13	suppressed
Naltrexone Hcl	Naltrexone Hcl	13	suppressed
Oxycodone Hcl	Oxycodone Hcl	13	suppressed
Rizatriptan	Rizatriptan Benzoate	13	suppressed
Terbinafine Hcl	Terbinafine Hcl	13	11
Zolpidem Tartrate Er	Zolpidem Tartrate	13	suppressed
Benazepril Hcl	Benazepril Hcl	12	suppressed
Methadone Hcl	Methadone Hcl	12	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	12	11
Nystatin-Triamcinolone	Nystatin/Triamcinolone Acet	12	suppressed
Stiolto Respimat	Tiotropium Br/Olodaterol Hcl	12	suppressed
Celecoxib	Celecoxib	11	suppressed
Fluconazole	Fluconazole	11	suppressed
Hydrocortisone	Hydrocortisone	11	suppressed
Paroxetine Hcl	Paroxetine Hcl	11	suppressed
Retin-A	Tretinoin	11	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	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

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