Healthcare provider profile · identity verified

Lew D Barker, MD

Family Practice · TURLOCK, CA · NPI 1295770337

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	514	130
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	457	74
Omeprazole	Omeprazole	396	90
Amlodipine Besylate	Amlodipine Besylate	350	81
Levothyroxine Sodium	Levothyroxine Sodium	328	76
Metformin Hcl	Metformin Hcl	277	74
Gabapentin	Gabapentin	266	55
Lisinopril	Lisinopril	263	69
Hydrochlorothiazide	Hydrochlorothiazide	239	55
Losartan Potassium	Losartan Potassium	206	53
Furosemide	Furosemide	190	54
Tamsulosin Hcl	Tamsulosin Hcl	188	47
Carvedilol	Carvedilol	173	39
Escitalopram Oxalate	Escitalopram Oxalate	172	24
Albuterol Sulfate Hfa	Albuterol Sulfate	168	54
Buspirone Hcl	Buspirone Hcl	164	34
Metoprolol Succinate	Metoprolol Succinate	152	41
Simvastatin	Simvastatin	140	32
Trazodone Hcl	Trazodone Hcl	137	39
Alprazolam	Alprazolam	132	36
Lorazepam	Lorazepam	125	26
Meloxicam	Meloxicam	121	34
Pantoprazole Sodium	Pantoprazole Sodium	117	29
Tizanidine Hcl	Tizanidine Hcl	111	33
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	107	26
Zolpidem Tartrate	Zolpidem Tartrate	102	16
Famotidine	Famotidine	96	24
Glimepiride	Glimepiride	94	25
Fluticasone Propionate	Fluticasone Propionate	92	25
Potassium Chloride	Potassium Chloride	86	24
Metoprolol Tartrate	Metoprolol Tartrate	82	21
Venlafaxine Hcl Er	Venlafaxine Hcl	80	16
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	79	21
Duloxetine Hcl	Duloxetine Hcl	76	16
Fenofibrate	Fenofibrate	73	20
Allopurinol	Allopurinol	72	16
Citalopram Hbr	Citalopram Hydrobromide	72	22
Tramadol Hcl	Tramadol Hcl	72	26
Pravastatin Sodium	Pravastatin Sodium	70	17
Fluoxetine Hcl	Fluoxetine Hcl	68	12
Triamcinolone Acetonide	Triamcinolone Acetonide	68	34
Baclofen	Baclofen	67	20
Oxybutynin Chloride Er	Oxybutynin Chloride	67	16
Sertraline Hcl	Sertraline Hcl	67	18
Ibuprofen	Ibuprofen	65	18
Diclofenac Sodium	Diclofenac Sodium	64	17
Eliquis	Apixaban	64	15
Clonazepam	Clonazepam	63	15
Ozempic	Semaglutide	60	12
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	57	suppressed
Rosuvastatin Calcium	Rosuvastatin Calcium	57	14
Irbesartan	Irbesartan	55	16
Finasteride	Finasteride	52	11
Glipizide	Glipizide	52	14
Clopidogrel	Clopidogrel Bisulfate	51	13
Lovastatin	Lovastatin	51	suppressed
Ropinirole Hcl	Ropinirole Hcl	51	suppressed
Azithromycin	Azithromycin	48	48
Cefuroxime	Cefuroxime Axetil	44	38
Meclizine Hcl	Meclizine Hcl	43	13
Montelukast Sodium	Montelukast Sodium	43	17
Synthroid	Levothyroxine Sodium	41	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	40	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	40	30
Atenolol	Atenolol	37	suppressed
Benazepril Hcl	Benazepril Hcl	37	11
Bupropion Hcl	Bupropion Hcl	37	suppressed
Metformin Hcl Er	Metformin Hcl	37	suppressed
Bumetanide	Bumetanide	35	suppressed
Hydralazine Hcl	Hydralazine Hcl	33	suppressed
Hydrocortisone	Hydrocortisone	33	18
Memantine Hcl	Memantine Hcl	32	suppressed
Paroxetine Hcl	Paroxetine Hcl	32	suppressed
Terazosin Hcl	Terazosin Hcl	32	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	31	suppressed
Estradiol	Estradiol	31	12
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	31	22
Fentanyl	Fentanyl	29	suppressed
Dutasteride	Dutasteride	28	suppressed
Januvia	Sitagliptin Phosphate	28	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	27	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	27	suppressed
Pregabalin	Pregabalin	27	suppressed
Methylprednisolone	Methylprednisolone	26	23
Bupropion Xl	Bupropion Hcl	25	suppressed
Carisoprodol	Carisoprodol	25	suppressed
Nifedipine Er	Nifedipine	25	suppressed
Acyclovir	Acyclovir	24	suppressed
Jardiance	Empagliflozin	24	suppressed
Propranolol Hcl	Propranolol Hcl	24	suppressed
Risperidone	Risperidone	23	suppressed
Ventolin Hfa	Albuterol Sulfate	23	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	22	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	22	suppressed
Nitroglycerin	Nitroglycerin	22	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	22	suppressed
Olanzapine	Olanzapine	22	suppressed
Bupropion Hcl Sr	Bupropion Hcl	21	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	21	suppressed
Ondansetron Odt	Ondansetron	21	11
Spironolactone	Spironolactone	21	suppressed
Amiodarone Hcl	Amiodarone Hcl	20	suppressed
Clonidine Hcl	Clonidine Hcl	20	suppressed
Phenobarbital	Phenobarbital	20	suppressed
Prednisone	Prednisone	20	17
Mounjaro	Tirzepatide	19	suppressed
Rybelsus	Semaglutide	19	suppressed
Warfarin Sodium	Warfarin Sodium	19	suppressed
Promethazine Hcl	Promethazine Hcl	18	suppressed
Sildenafil Citrate	Sildenafil Citrate	18	suppressed
Alendronate Sodium	Alendronate Sodium	17	suppressed
Enalapril Maleate	Enalapril Maleate	17	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	17	17
Wixela Inhub	Fluticasone Propion/Salmeterol	17	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	16	suppressed
Naproxen	Naproxen	15	suppressed
Amiloride Hcl	Amiloride Hcl	14	suppressed
Ezetimibe	Ezetimibe	14	suppressed
Fluconazole	Fluconazole	14	11
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	14	suppressed
Linzess	Linaclotide	14	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	14	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	14	suppressed
Azelastine Hcl	Azelastine Hcl	13	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	13	suppressed
Donepezil Hcl	Donepezil Hcl	13	suppressed
Neomycin-Polymyxin-Dexameth	Neomycin/Polymyxin B/Dexametha	13	suppressed
Valsartan	Valsartan	13	suppressed
Venlafaxine Hcl	Venlafaxine Hcl	13	suppressed
Fluocinonide	Fluocinonide	12	suppressed
Oracea	Doxycycline Monohydrate	12	suppressed
Rizatriptan	Rizatriptan Benzoate	12	suppressed
Cholestyramine	Cholestyramine (With Sugar)	11	suppressed
Farxiga	Dapagliflozin Propanediol	11	suppressed
Folic Acid	Folic Acid	11	suppressed
Irbesartan-Hydrochlorothiazide	Irbesartan/Hydrochlorothiazide	11	suppressed
Methadone Hcl	Methadone Hcl	11	suppressed
Mirtazapine	Mirtazapine	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