Healthcare provider profile · identity verified

Ryan S. Lum, MD

Internal Medicine · SAN RAFAEL, CA · NPI 1841374824

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	367	127
Lisinopril	Lisinopril	253	83
Losartan Potassium	Losartan Potassium	250	88
Tamsulosin Hcl	Tamsulosin Hcl	244	81
Amlodipine Besylate	Amlodipine Besylate	204	73
Fluticasone Propionate	Fluticasone Propionate	200	71
Levothyroxine Sodium	Levothyroxine Sodium	189	56
Metformin Hcl Er	Metformin Hcl	148	52
Hydrochlorothiazide	Hydrochlorothiazide	143	56
Pantoprazole Sodium	Pantoprazole Sodium	103	39
Allopurinol	Allopurinol	102	32
Atenolol	Atenolol	101	35
Rosuvastatin Calcium	Rosuvastatin Calcium	84	32
Finasteride	Finasteride	74	21
Simvastatin	Simvastatin	72	27
Albuterol Sulfate Hfa	Albuterol Sulfate	70	31
Famotidine	Famotidine	69	31
Nabumetone	Nabumetone	69	38
Terazosin Hcl	Terazosin Hcl	68	24
Furosemide	Furosemide	64	33
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	61	27
Omeprazole	Omeprazole	61	24
Metoprolol Tartrate	Metoprolol Tartrate	57	17
Alendronate Sodium	Alendronate Sodium	56	21
Trazodone Hcl	Trazodone Hcl	55	27
Azithromycin	Azithromycin	54	45
Gabapentin	Gabapentin	53	18
Pradaxa	Dabigatran Etexilate Mesylate	48	17
Alvesco	Ciclesonide	46	18
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	45	19
Duloxetine Hcl	Duloxetine Hcl	39	11
Montelukast Sodium	Montelukast Sodium	39	suppressed
Pravastatin Sodium	Pravastatin Sodium	39	14
Metformin Hcl	Metformin Hcl	35	13
Cephalexin	Cephalexin	34	29
Jardiance	Empagliflozin	34	11
Glipizide	Glipizide	33	14
Metoprolol Succinate	Metoprolol Succinate	33	12
Warfarin Sodium	Warfarin Sodium	31	12
Amoxicillin	Amoxicillin	30	18
Prednisone	Prednisone	30	22
Potassium Chloride	Potassium Chloride	29	suppressed
Carvedilol	Carvedilol	27	suppressed
Ciclopirox	Ciclopirox	27	12
Meloxicam	Meloxicam	26	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	26	22
Acyclovir	Acyclovir	25	12
Clopidogrel	Clopidogrel Bisulfate	25	suppressed
Sertraline Hcl	Sertraline Hcl	25	11
Adacel Tdap	Diph,pertuss(Acell),tet Vac/Pf	24	24
Citalopram Hbr	Citalopram Hydrobromide	24	suppressed
Ibuprofen	Ibuprofen	24	suppressed
Spironolactone	Spironolactone	24	suppressed
Colchicine	Colchicine	23	suppressed
Escitalopram Oxalate	Escitalopram Oxalate	23	suppressed
Fluocinonide	Fluocinonide	23	16
Doxycycline Monohydrate	Doxycycline Monohydrate	21	18
Fluoxetine Hcl	Fluoxetine Hcl	21	suppressed
Lovastatin	Lovastatin	21	suppressed
Mupirocin	Mupirocin	21	19
Ciprofloxacin Hcl	Ciprofloxacin Hcl	20	18
Hydralazine Hcl	Hydralazine Hcl	20	suppressed
Levofloxacin	Levofloxacin	18	14
Mirtazapine	Mirtazapine	18	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	18	suppressed
Lorazepam	Lorazepam	17	11
Victoza 2-Pak	Liraglutide	17	suppressed
Spiriva Respimat	Tiotropium Bromide	16	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	16	suppressed
Clonidine Hcl	Clonidine Hcl	15	suppressed
Alprazolam	Alprazolam	14	suppressed
Azelastine Hcl	Azelastine Hcl	14	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	14	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	13	suppressed
Baclofen	Baclofen	13	suppressed
Celecoxib	Celecoxib	13	suppressed
Ozempic	Semaglutide	13	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	12	11
Humulin R	Insulin Regular, Human	12	suppressed
Metronidazole	Metronidazole	12	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	12	suppressed
Propranolol Hcl	Propranolol Hcl	12	suppressed
Trospium Chloride	Trospium Chloride	12	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	11	suppressed
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	11	suppressed
Ofloxacin	Ofloxacin	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