Healthcare provider profile · identity verified

Tuan Van Phan, MD

Family Practice · WESTMINSTER, CA · NPI 1396799672

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	612	206
Amlodipine Besylate	Amlodipine Besylate	393	125
Metformin Hcl	Metformin Hcl	326	98
Losartan Potassium	Losartan Potassium	308	100
Azithromycin	Azithromycin	243	227
Alendronate Sodium	Alendronate Sodium	199	66
Januvia	Sitagliptin Phosphate	173	32
Triamcinolone Acetonide	Triamcinolone Acetonide	162	97
Omeprazole	Omeprazole	139	61
Gabapentin	Gabapentin	131	48
Cephalexin	Cephalexin	128	122
Metoprolol Succinate	Metoprolol Succinate	127	37
Atenolol	Atenolol	115	36
Farxiga	Dapagliflozin Propanediol	114	32
Jardiance	Empagliflozin	111	24
Pravastatin Sodium	Pravastatin Sodium	108	30
Valsartan	Valsartan	108	38
Pioglitazone Hcl	Pioglitazone Hcl	99	27
Pantoprazole Sodium	Pantoprazole Sodium	97	40
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	95	91
Prednisone	Prednisone	95	77
Famotidine	Famotidine	93	35
Montelukast Sodium	Montelukast Sodium	90	29
Fluticasone Propionate	Fluticasone Propionate	87	28
Tizanidine Hcl	Tizanidine Hcl	85	72
Celecoxib	Celecoxib	83	42
Lisinopril	Lisinopril	81	29
Rosuvastatin Calcium	Rosuvastatin Calcium	81	24
Simvastatin	Simvastatin	79	23
Diclofenac Sodium	Diclofenac Sodium	76	34
Albuterol Sulfate Hfa	Albuterol Sulfate	74	54
Benazepril Hcl	Benazepril Hcl	73	20
Amoxicillin	Amoxicillin	72	57
Hydrochlorothiazide	Hydrochlorothiazide	70	21
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	69	35
Ibuprofen	Ibuprofen	66	49
Lovastatin	Lovastatin	65	19
Glimepiride	Glimepiride	61	19
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	59	59
Hydrocortisone	Hydrocortisone	57	31
Vascepa	Icosapent Ethyl	57	14
Ciprofloxacin Hcl	Ciprofloxacin Hcl	55	51
Olmesartan Medoxomil	Olmesartan Medoxomil	54	suppressed
Metoprolol Tartrate	Metoprolol Tartrate	53	15
Paxlovid	Nirmatrelvir/Ritonavir	53	53
Levothyroxine Sodium	Levothyroxine Sodium	51	16
Meclizine Hcl	Meclizine Hcl	51	42
Cefdinir	Cefdinir	50	47
Tamsulosin Hcl	Tamsulosin Hcl	49	23
Acarbose	Acarbose	48	suppressed
Glipizide Er	Glipizide	46	12
Acetaminophen-Codeine	Acetaminophen With Codeine	42	19
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	42	33
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	42	suppressed
Clopidogrel	Clopidogrel Bisulfate	40	12
Doxycycline Hyclate	Doxycycline Hyclate	40	40
Prolia	Denosumab	40	30
Metformin Hcl Er	Metformin Hcl	38	11
Allopurinol	Allopurinol	37	11
Mupirocin	Mupirocin	36	35
Betamethasone Dipropionate	Betamethasone Dipropionate	35	20
Ketoconazole	Ketoconazole	35	18
Methylprednisolone	Methylprednisolone	35	35
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	35	34
Zolpidem Tartrate	Zolpidem Tartrate	35	16
Dexlansoprazole Dr	Dexlansoprazole	33	suppressed
Ondansetron Odt	Ondansetron	33	28
Felodipine Er	Felodipine	32	suppressed
Lorazepam	Lorazepam	32	12
Alcohol Prep Pads	Alcohol Antiseptic Pads	30	16
Icosapent Ethyl	Icosapent Ethyl	30	suppressed
Loperamide	Loperamide Hcl	30	24
Sertraline Hcl	Sertraline Hcl	30	suppressed
Clobetasol Propionate	Clobetasol Propionate	29	16
Fenofibrate	Fenofibrate Nanocrystallized	29	13
Hydroxyzine Hcl	Hydroxyzine Hcl	29	22
Carvedilol	Carvedilol	28	suppressed
Polymyxin B Sul-Trimethoprim	Polymyxin B Sulf/Trimethoprim	28	27
Glipizide	Glipizide	26	suppressed
Vemlidy	Tenofovir Alafenamide	26	suppressed
Ventolin Hfa	Albuterol Sulfate	26	suppressed
Procto-Med Hc	Hydrocortisone	25	11
Cromolyn Sodium	Cromolyn Sodium	24	17
Megestrol Acetate	Megestrol Acetate	24	suppressed
Tramadol Hcl	Tramadol Hcl	24	20
Baclofen	Baclofen	23	17
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	23	23
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	23	22
Memantine Hcl	Memantine Hcl	22	suppressed
Omega-3 Acid Ethyl Esters	Omega-3 Acid Ethyl Esters	22	suppressed
Neomycin-Polymyxin-Hydrocort	Neomycin/Polymyxin B/Hydrocort	21	18
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	21	suppressed
Citalopram Hbr	Citalopram Hydrobromide	20	suppressed
Naproxen	Naproxen	20	19
Amitriptyline Hcl	Amitriptyline Hcl	19	suppressed
Clonazepam	Clonazepam	19	suppressed
Gemfibrozil	Gemfibrozil	19	suppressed
Valacyclovir	Valacyclovir Hcl	19	16
Chlorthalidone	Chlorthalidone	18	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	18	16
Hydralazine Hcl	Hydralazine Hcl	18	suppressed
Olanzapine	Olanzapine	17	suppressed
Colchicine	Colchicine	16	13
Lidocaine	Lidocaine	16	suppressed
Trazodone Hcl	Trazodone Hcl	16	suppressed
Bisoprolol Fumarate	Bisoprolol Fumarate	15	suppressed
Dapagliflozin	Dapagliflozin Propanediol	15	11
Fenofibrate	Fenofibrate	15	suppressed
Invokana	Canagliflozin	15	suppressed
Linzess	Linaclotide	15	suppressed
Trulicity	Dulaglutide	15	suppressed
Fenofibrate	Fenofibrate,micronized	14	suppressed
Pregabalin	Pregabalin	14	suppressed
Nebivolol Hcl	Nebivolol Hcl	13	suppressed
Budesonide-Formoterol Fumarate	Budesonide/Formoterol Fumarate	12	suppressed
Clonidine Hcl	Clonidine Hcl	12	suppressed
Myrbetriq	Mirabegron	12	suppressed
Oseltamivir Phosphate	Oseltamivir Phosphate	12	12
Paroxetine Hcl	Paroxetine Hcl	12	suppressed
Symbicort	Budesonide/Formoterol Fumarate	12	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	12	suppressed
Breztri Aerosphere	Budesonide/Glycopyr/Formoterol	11	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	11	suppressed
Glipizide-Metformin	Glipizide/Metformin Hcl	11	suppressed
Sildenafil Citrate	Sildenafil Citrate	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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