Healthcare provider profile · identity verified

David L Chan, MD

Family Practice · SHORELINE, WA · NPI 1144648148

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	575	175
Amlodipine Besylate	Amlodipine Besylate	388	113
Lisinopril	Lisinopril	308	94
Levothyroxine Sodium	Levothyroxine Sodium	281	74
Omeprazole	Omeprazole	173	43
Losartan Potassium	Losartan Potassium	155	50
Tamsulosin Hcl	Tamsulosin Hcl	145	43
Metformin Hcl Er	Metformin Hcl	140	42
Trazodone Hcl	Trazodone Hcl	130	34
Metoprolol Succinate	Metoprolol Succinate	127	39
Gabapentin	Gabapentin	126	42
Simvastatin	Simvastatin	123	33
Metformin Hcl	Metformin Hcl	110	30
Allopurinol	Allopurinol	101	22
Albuterol Sulfate Hfa	Albuterol Sulfate	99	32
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	93	16
Hydrochlorothiazide	Hydrochlorothiazide	92	31
Sertraline Hcl	Sertraline Hcl	80	20
Rosuvastatin Calcium	Rosuvastatin Calcium	76	27
Tizanidine Hcl	Tizanidine Hcl	73	11
Alendronate Sodium	Alendronate Sodium	71	19
Fluticasone Propionate	Fluticasone Propionate	70	24
Eliquis	Apixaban	69	19
Ozempic	Semaglutide	67	19
Alprazolam	Alprazolam	64	16
Jardiance	Empagliflozin	64	19
Pantoprazole Sodium	Pantoprazole Sodium	63	22
Duloxetine Hcl	Duloxetine Hcl	57	16
Fluoxetine Hcl	Fluoxetine Hcl	57	15
Quetiapine Fumarate	Quetiapine Fumarate	57	suppressed
Metoprolol Tartrate	Metoprolol Tartrate	56	16
Pregabalin	Pregabalin	54	suppressed
Mirtazapine	Mirtazapine	52	14
Escitalopram Oxalate	Escitalopram Oxalate	51	20
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	49	16
Tramadol Hcl	Tramadol Hcl	48	suppressed
Pravastatin Sodium	Pravastatin Sodium	45	15
Clopidogrel	Clopidogrel Bisulfate	44	suppressed
Furosemide	Furosemide	44	21
Oxycodone Hcl	Oxycodone Hcl	44	suppressed
Lamotrigine	Lamotrigine	41	suppressed
Meloxicam	Meloxicam	40	15
Venlafaxine Hcl Er	Venlafaxine Hcl	40	suppressed
Carvedilol	Carvedilol	39	13
Lorazepam	Lorazepam	39	suppressed
Diclofenac Sodium	Diclofenac Sodium	37	suppressed
Famotidine	Famotidine	37	15
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	37	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	37	25
Spironolactone	Spironolactone	35	suppressed
Morphine Sulfate Er	Morphine Sulfate	34	suppressed
Buspirone Hcl	Buspirone Hcl	33	suppressed
Lovastatin	Lovastatin	32	suppressed
Methocarbamol	Methocarbamol	31	13
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	30	suppressed
Finasteride	Finasteride	29	suppressed
Chlorthalidone	Chlorthalidone	28	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	28	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	28	12
Ondansetron Odt	Ondansetron	28	11
Potassium Chloride	Potassium Chloride	28	suppressed
Bupropion Xl	Bupropion Hcl	27	suppressed
Clonazepam	Clonazepam	27	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	27	12
Warfarin Sodium	Warfarin Sodium	27	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	26	suppressed
Ketoconazole	Ketoconazole	26	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	26	11
Trulicity	Dulaglutide	26	suppressed
Citalopram Hbr	Citalopram Hydrobromide	25	suppressed
Enalapril Maleate	Enalapril Maleate	25	suppressed
Atenolol	Atenolol	24	suppressed
Benazepril Hcl	Benazepril Hcl	24	suppressed
Glimepiride	Glimepiride	23	suppressed
Montelukast Sodium	Montelukast Sodium	23	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	23	suppressed
Diclofenac Potassium	Diclofenac Potassium	22	14
Hydroxyzine Hcl	Hydroxyzine Hcl	22	suppressed
Valacyclovir	Valacyclovir Hcl	21	13
Donepezil Hcl	Donepezil Hcl	20	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	20	14
Baclofen	Baclofen	19	suppressed
Ezetimibe	Ezetimibe	19	suppressed
Methadone Hcl	Methadone Hcl	19	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	18	suppressed
Loperamide	Loperamide Hcl	18	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	17	suppressed
Propranolol Hcl	Propranolol Hcl	17	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	16	suppressed
Januvia	Sitagliptin Phosphate	16	suppressed
Memantine Hcl	Memantine Hcl	16	suppressed
Olanzapine	Olanzapine	16	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	16	suppressed
Acyclovir	Acyclovir	15	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	15	14
Estradiol	Estradiol	15	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	15	suppressed
Prednisone	Prednisone	15	13
Wixela Inhub	Fluticasone Propion/Salmeterol	15	suppressed
Celecoxib	Celecoxib	14	suppressed
Glipizide Er	Glipizide	14	suppressed
Paroxetine Hcl	Paroxetine Hcl	14	suppressed
Scopolamine	Scopolamine	14	suppressed
Terazosin Hcl	Terazosin Hcl	14	suppressed
Cefadroxil	Cefadroxil	13	13
Diazepam	Diazepam	13	suppressed
Dulera	Mometasone/Formoterol	13	suppressed
Irbesartan	Irbesartan	13	suppressed
Qvar Redihaler	Beclomethasone Dipropionate	13	suppressed
Ramipril	Ramipril	13	suppressed
Risperidone	Risperidone	13	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	13	suppressed
Glipizide	Glipizide	12	suppressed
Humulin N	Insulin Nph Human Isophane	12	suppressed
Prazosin Hcl	Prazosin Hcl	12	suppressed
Xifaxan	Rifaximin	12	suppressed
Zafirlukast	Zafirlukast	12	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	11	suppressed
Clobetasol Propionate	Clobetasol Propionate	11	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	11	suppressed
Fentanyl	Fentanyl	11	suppressed
Xarelto	Rivaroxaban	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