Healthcare provider profile · identity verified

David A Portier, MD

Internal Medicine · DALY CITY, CA · NPI 1417118639

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	2094	228
Amlodipine Besylate	Amlodipine Besylate	1389	136
Tamsulosin Hcl	Tamsulosin Hcl	867	92
Gabapentin	Gabapentin	727	101
Eliquis	Apixaban	649	94
Pantoprazole Sodium	Pantoprazole Sodium	581	111
Lisinopril	Lisinopril	556	48
Levothyroxine Sodium	Levothyroxine Sodium	537	80
Metformin Hcl	Metformin Hcl	462	54
Metoprolol Tartrate	Metoprolol Tartrate	421	56
Furosemide	Furosemide	392	67
Escitalopram Oxalate	Escitalopram Oxalate	389	41
Mirtazapine	Mirtazapine	381	57
Metoprolol Succinate	Metoprolol Succinate	380	74
Carvedilol	Carvedilol	349	41
Levetiracetam	Levetiracetam	339	35
Finasteride	Finasteride	335	61
Donepezil Hcl	Donepezil Hcl	331	33
Famotidine	Famotidine	318	45
Losartan Potassium	Losartan Potassium	309	59
Hydralazine Hcl	Hydralazine Hcl	299	34
Trazodone Hcl	Trazodone Hcl	294	47
Sertraline Hcl	Sertraline Hcl	277	31
Montelukast Sodium	Montelukast Sodium	265	19
Baclofen	Baclofen	258	24
Clopidogrel	Clopidogrel Bisulfate	256	34
Allopurinol	Allopurinol	255	22
Memantine Hcl	Memantine Hcl	250	21
Quetiapine Fumarate	Quetiapine Fumarate	216	34
Carbidopa-Levodopa	Carbidopa/Levodopa	208	20
Omeprazole	Omeprazole	188	21
Pravastatin Sodium	Pravastatin Sodium	186	16
Jardiance	Empagliflozin	172	27
Simvastatin	Simvastatin	172	23
Januvia	Sitagliptin Phosphate	164	19
Xarelto	Rivaroxaban	156	19
Duloxetine Hcl	Duloxetine Hcl	154	32
Rosuvastatin Calcium	Rosuvastatin Calcium	148	17
Spironolactone	Spironolactone	146	34
Risperidone	Risperidone	144	15
Doxazosin Mesylate	Doxazosin Mesylate	136	14
Latanoprost	Latanoprost	136	34
Olanzapine	Olanzapine	129	21
Lansoprazole	Lansoprazole	126	17
Bupropion Xl	Bupropion Hcl	119	12
Ondansetron Hcl	Ondansetron Hcl	106	36
Tradjenta	Linagliptin	94	12
Oxybutynin Chloride Er	Oxybutynin Chloride	93	suppressed
Metformin Hcl Er	Metformin Hcl	90	suppressed
Bumetanide	Bumetanide	87	17
Isosorbide Dinitrate	Isosorbide Dinitrate	87	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	85	31
Midodrine Hcl	Midodrine Hcl	83	16
Valsartan	Valsartan	83	suppressed
Labetalol Hcl	Labetalol Hcl	79	suppressed
Divalproex Sodium	Divalproex Sodium	77	14
Sodium Chloride	0.9 % Sodium Chloride	76	44
Amiodarone Hcl	Amiodarone Hcl	75	12
Glipizide	Glipizide	72	suppressed
Myrbetriq	Mirabegron	68	suppressed
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	66	36
Terazosin Hcl	Terazosin Hcl	64	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	63	23
Potassium Chloride	Potassium Chloride	63	16
Fluoxetine Hcl	Fluoxetine Hcl	62	13
Diltiazem Hcl	Diltiazem Hcl	61	suppressed
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	61	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	60	11
Atenolol	Atenolol	59	suppressed
Metoclopramide Hcl	Metoclopramide Hcl	59	suppressed
Insulin Lispro	Insulin Lispro	58	35
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	56	12
Enulose	Lactulose	56	suppressed
Digoxin	Digoxin	54	suppressed
Loperamide	Loperamide Hcl	54	suppressed
Folic Acid	Folic Acid	53	suppressed
Albuterol Sulfate Hfa	Albuterol Sulfate	52	43
Sevelamer Carbonate	Sevelamer Carbonate	52	14
Doxycycline Hyclate	Doxycycline Hyclate	51	21
Oxycodone Hcl	Oxycodone Hcl	51	19
Citalopram Hbr	Citalopram Hydrobromide	50	12
Colchicine	Colchicine	48	suppressed
Primidone	Primidone	48	suppressed
Prednisone	Prednisone	47	15
Hydrochlorothiazide	Hydrochlorothiazide	46	suppressed
Lovastatin	Lovastatin	46	suppressed
Nystatin	Nystatin	46	26
Benazepril Hcl	Benazepril Hcl	43	suppressed
Farxiga	Dapagliflozin Propanediol	42	suppressed
Incruse Ellipta	Umeclidinium Bromide	42	12
Lidocaine	Lidocaine	42	19
Brilinta	Ticagrelor	41	suppressed
Calcium Acetate	Calcium Acetate	41	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	41	17
Isosorbide Mononitrate Er	Isosorbide Mononitrate	41	suppressed
Brimonidine Tartrate	Brimonidine Tartrate	39	suppressed
Otezla	Apremilast	39	suppressed
Acyclovir	Acyclovir	38	suppressed
Amantadine	Amantadine Hcl	37	suppressed
Alendronate Sodium	Alendronate Sodium	36	11
Cephalexin	Cephalexin	36	26
Insulin Lispro Kwikpen U-100	Insulin Lispro	36	12
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	34	suppressed
Torsemide	Torsemide	34	suppressed
Ezetimibe	Ezetimibe	33	suppressed
Glimepiride	Glimepiride	32	suppressed
Buspirone Hcl	Buspirone Hcl	31	suppressed
Estradiol	Estradiol	31	suppressed
Budesonide-Formoterol Fumarate	Budesonide/Formoterol Fumarate	30	16
Carbidopa-Levodopa Er	Carbidopa/Levodopa	30	suppressed
Timolol Maleate	Timolol Maleate	30	suppressed
Memantine Hcl Er	Memantine Hcl	29	suppressed
Ropinirole Hcl	Ropinirole Hcl	29	suppressed
Albuterol Sulfate	Albuterol Sulfate	28	14
Sucralfate	Sucralfate	28	suppressed
Entresto	Sacubitril/Valsartan	27	suppressed
Vancomycin Hcl	Vancomycin/Water For Inj (Peg)	27	suppressed
Fenofibrate	Fenofibrate	26	suppressed
Benztropine Mesylate	Benztropine Mesylate	25	suppressed
Clotrimazole	Clotrimazole	25	suppressed
Fludrocortisone Acetate	Fludrocortisone Acetate	25	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	24	suppressed
Aripiprazole	Aripiprazole	24	suppressed
Dexlansoprazole Dr	Dexlansoprazole	24	suppressed
Fluticasone Propionate	Fluticasone Propionate	24	suppressed
Mupirocin	Mupirocin	24	12
Novolog	Insulin Aspart	24	suppressed
Ondansetron Odt	Ondansetron	24	14
Bupropion Hcl Sr	Bupropion Hcl	23	suppressed
Haloperidol	Haloperidol	23	suppressed
Propranolol Hcl	Propranolol Hcl	23	suppressed
Doxepin Hcl	Doxepin Hcl	22	suppressed
Lactulose	Lactulose	22	suppressed
Nurtec Odt	Rimegepant Sulfate	22	suppressed
Heparin Sodium	Heparin Sodium,porcine	21	suppressed
Topiramate	Topiramate	21	suppressed
Arexvy	Rsvpref3 Antigen/As01e/Pf	20	19
Clonidine	Clonidine	20	suppressed
Dorzolamide-Timolol	Dorzolamide Hcl/Timolol Maleat	20	suppressed
Nyamyc	Nystatin	20	16
Paroxetine Hcl	Paroxetine Hcl	20	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	20	13
Valproic Acid	Valproic Acid (As Sodium Salt)	20	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	19	13
Ceftriaxone	Ceftriaxone Sodium	19	12
Celecoxib	Celecoxib	19	suppressed
Methenamine Hippurate	Methenamine Hippurate	19	suppressed
Symbicort	Budesonide/Formoterol Fumarate	19	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	19	suppressed
Xifaxan	Rifaximin	19	suppressed
Clobetasol Propionate	Clobetasol Propionate	18	suppressed
Insulin Aspart	Insulin Aspart	18	12
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	18	suppressed
Lamotrigine	Lamotrigine	18	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	17	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	17	11
Fluconazole	Fluconazole	17	suppressed
Irbesartan-Hydrochlorothiazide	Irbesartan/Hydrochlorothiazide	17	suppressed
Levofloxacin	Levofloxacin	17	13
Sevelamer Hcl	Sevelamer Hcl	17	suppressed
Hydrocortisone	Hydrocortisone	16	suppressed
Spiriva Respimat	Tiotropium Bromide	16	11
Tiotropium Bromide	Tiotropium Bromide	16	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	15	suppressed
Dapsone	Dapsone	15	suppressed
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	15	suppressed
Lacosamide	Lacosamide	15	suppressed
Ursodiol	Ursodiol	15	suppressed
Venlafaxine Hcl	Venlafaxine Hcl	15	suppressed
Clozapine Odt	Clozapine	14	suppressed
Dulera	Mometasone/Formoterol	14	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	14	suppressed
Glipizide Er	Glipizide	14	suppressed
Morphine Sulfate Er	Morphine Sulfate	14	suppressed
Desmopressin Acetate	Desmopressin Acetate	13	suppressed
Enoxaparin Sodium	Enoxaparin Sodium	13	suppressed
Ketoconazole	Ketoconazole	13	suppressed
Pentoxifylline	Pentoxifylline	13	suppressed
Prazosin Hcl	Prazosin Hcl	13	suppressed
Ranolazine Er	Ranolazine	13	suppressed
Ziprasidone Hcl	Ziprasidone Hcl	13	suppressed
Advair Diskus	Fluticasone Propion/Salmeterol	12	suppressed
Breo Ellipta	Fluticasone/Vilanterol	12	suppressed
Clozapine	Clozapine	12	suppressed
Creon	Lipase/Protease/Amylase	12	suppressed
Dapagliflozin	Dapagliflozin Propanediol	12	suppressed
Dorzolamide-Timolol	Dorzolamide/Timolol/Pf	12	suppressed
Entacapone	Entacapone	12	suppressed
Erythromycin	Erythromycin Base	12	suppressed
Linzess	Linaclotide	12	suppressed
Lokelma	Sodium Zirconium Cyclosilicate	12	suppressed
Santyl	Collagenase Clostridium Hist.	12	suppressed
Vancomycin Hcl	Vancomycin Hcl	12	suppressed
Ceftriaxone	Ceftriaxone In Is-Osm Dextrose	11	suppressed
Fluticasone-Salmeterol Hfa	Fluticasone Propion/Salmeterol	11	suppressed
Humalog	Insulin Lispro	11	suppressed
Humulin R	Insulin Regular, Human	11	suppressed
Methimazole	Methimazole	11	suppressed
Perphenazine	Perphenazine	11	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	11	suppressed
Tramadol Hcl	Tramadol Hcl	11	suppressed
Trifluoperazine Hcl	Trifluoperazine Hcl	11	suppressed
Trihexyphenidyl Hcl	Trihexyphenidyl Hcl	11	suppressed
Trulicity	Dulaglutide	11	suppressed
Valproic Acid	Valproic Acid	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