Healthcare provider profile · identity verified

Hong Phuc Nguyen, DO

Internal Medicine · LANCASTER, CA · NPI 1992995997

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	791	215
Metoprolol Succinate	Metoprolol Succinate	485	147
Midodrine Hcl	Midodrine Hcl	425	89
Montelukast Sodium	Montelukast Sodium	348	97
Lisinopril	Lisinopril	250	74
Tamsulosin Hcl	Tamsulosin Hcl	218	61
Amlodipine Besylate	Amlodipine Besylate	212	62
Rosuvastatin Calcium	Rosuvastatin Calcium	199	56
Gabapentin	Gabapentin	191	56
Fludrocortisone Acetate	Fludrocortisone Acetate	170	45
Metformin Hcl Er	Metformin Hcl	166	50
Ipratropium Bromide	Ipratropium Bromide	146	51
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	140	39
Eliquis	Apixaban	137	23
Hydralazine Hcl	Hydralazine Hcl	129	34
Levothyroxine Sodium	Levothyroxine Sodium	127	36
Losartan Potassium	Losartan Potassium	123	43
Albuterol Sulfate Hfa	Albuterol Sulfate	120	36
Trazodone Hcl	Trazodone Hcl	113	30
Pantoprazole Sodium	Pantoprazole Sodium	112	31
Baclofen	Baclofen	109	34
Alendronate Sodium	Alendronate Sodium	104	36
Clopidogrel	Clopidogrel Bisulfate	101	26
Omeprazole	Omeprazole	92	24
Famotidine	Famotidine	82	30
Simvastatin	Simvastatin	77	19
Donepezil Hcl	Donepezil Hcl	76	22
Tolterodine Tartrate Er	Tolterodine Tartrate	73	21
Sertraline Hcl	Sertraline Hcl	66	15
Finasteride	Finasteride	63	19
Tramadol Hcl	Tramadol Hcl	58	24
Glipizide	Glipizide	53	16
Pravastatin Sodium	Pravastatin Sodium	52	14
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	50	suppressed
Trulicity	Dulaglutide	49	suppressed
Furosemide	Furosemide	45	18
Benazepril Hcl	Benazepril Hcl	43	13
Zolpidem Tartrate	Zolpidem Tartrate	42	suppressed
Valsartan	Valsartan	38	11
Digoxin	Digoxin	37	suppressed
Hydrochlorothiazide	Hydrochlorothiazide	37	13
Escitalopram Oxalate	Escitalopram Oxalate	35	suppressed
Allopurinol	Allopurinol	34	suppressed
Meloxicam	Meloxicam	31	suppressed
Fluticasone Propionate	Fluticasone Propionate	30	13
Xarelto	Rivaroxaban	29	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	28	suppressed
Diclofenac Sodium	Diclofenac Sodium	27	suppressed
Aripiprazole	Aripiprazole	26	suppressed
Buspirone Hcl	Buspirone Hcl	26	suppressed
Carvedilol	Carvedilol	26	suppressed
Duloxetine Hcl	Duloxetine Hcl	26	suppressed
Glipizide Er	Glipizide	26	suppressed
Metformin Er Gastric	Metformin Hcl	26	suppressed
Metformin Hcl	Metformin Hcl	26	11
Sildenafil Citrate	Sildenafil Citrate	26	suppressed
Memantine Hcl	Memantine Hcl	25	suppressed
Oxycodone Hcl	Oxycodone Hcl	25	suppressed
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	24	suppressed
Myrbetriq	Mirabegron	24	suppressed
Spironolactone	Spironolactone	24	suppressed
Sucralfate	Sucralfate	24	suppressed
Propranolol Hcl	Propranolol Hcl	23	suppressed
Stiolto Respimat	Tiotropium Br/Olodaterol Hcl	23	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	23	14
Cinacalcet Hcl	Cinacalcet Hcl	22	suppressed
Clonidine Hcl	Clonidine Hcl	22	suppressed
Ibandronate Sodium	Ibandronate Sodium	22	suppressed
Ketoconazole	Ketoconazole	22	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	22	suppressed
Terazosin Hcl	Terazosin Hcl	22	suppressed
Ibuprofen	Ibuprofen	21	suppressed
Irbesartan	Irbesartan	21	suppressed
Methimazole	Methimazole	21	suppressed
Ozempic	Semaglutide	21	suppressed
Alprazolam	Alprazolam	20	suppressed
Amiodarone Hcl	Amiodarone Hcl	20	suppressed
Januvia	Sitagliptin Phosphate	20	suppressed
Warfarin Sodium	Warfarin Sodium	19	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	18	suppressed
Glimepiride	Glimepiride	18	suppressed
Lactulose	Lactulose	18	suppressed
Latanoprost	Latanoprost	18	suppressed
Methocarbamol	Methocarbamol	18	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	18	suppressed
Bupropion Xl	Bupropion Hcl	17	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	17	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	17	suppressed
Meclizine Hcl	Meclizine Hcl	17	suppressed
Nifedipine Er	Nifedipine	17	suppressed
Jardiance	Empagliflozin	16	suppressed
Pyridostigmine Bromide	Pyridostigmine Bromide	16	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	15	12
Breo Ellipta	Fluticasone/Vilanterol	15	suppressed
Calcitriol	Calcitriol	15	suppressed
Synthroid	Levothyroxine Sodium	15	suppressed
Atrovent Hfa	Ipratropium Bromide	14	suppressed
Ezetimibe	Ezetimibe	14	suppressed
Hydrocortisone	Hydrocortisone	14	suppressed
Omeprazole-Sodium Bicarbonate	Omeprazole/Sodium Bicarbonate	14	suppressed
Spiriva Handihaler	Tiotropium Bromide	14	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	14	suppressed
Acyclovir	Acyclovir	13	suppressed
Fluconazole	Fluconazole	13	suppressed
Paroxetine Hcl	Paroxetine Hcl	13	suppressed
Potassium Chloride	Potassium Chloride	13	suppressed
Tizanidine Hcl	Tizanidine Hcl	13	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	13	suppressed
Carisoprodol	Carisoprodol	12	suppressed
Cyproheptadine Hcl	Cyproheptadine Hcl	12	suppressed
Entresto	Sacubitril/Valsartan	12	suppressed
Ibu	Ibuprofen	12	suppressed
Levetiracetam	Levetiracetam	12	suppressed
Metoprolol Tartrate	Metoprolol Tartrate	12	suppressed
Mounjaro	Tirzepatide	12	suppressed
Risedronate Sodium	Risedronate Sodium	12	suppressed
Tri-Lo-Estarylla	Norgestimate-Ethinyl Estradiol	12	suppressed
Advair Hfa	Fluticasone Propion/Salmeterol	11	suppressed
Citalopram Hbr	Citalopram Hydrobromide	11	suppressed
Humulin 70/30 Kwikpen	Insulin Nph Hum/Reg Insulin Hm	11	suppressed
Pregabalin	Pregabalin	11	suppressed
Primidone	Primidone	11	suppressed
Promethazine Hcl	Promethazine Hcl	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