Healthcare provider profile · identity verified

Hal S Shimazu, MD

Family Practice · ORANGE, CA · NPI 1073682241

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	793	288
Rosuvastatin Calcium	Rosuvastatin Calcium	592	209
Losartan Potassium	Losartan Potassium	537	171
Ezetimibe	Ezetimibe	415	146
Amlodipine Besylate	Amlodipine Besylate	301	107
Levothyroxine Sodium	Levothyroxine Sodium	284	89
Tamsulosin Hcl	Tamsulosin Hcl	264	86
Metformin Hcl Er	Metformin Hcl	241	83
Omeprazole	Omeprazole	217	85
Hydrochlorothiazide	Hydrochlorothiazide	201	80
Lisinopril	Lisinopril	176	64
Metformin Hcl	Metformin Hcl	174	62
Benazepril Hcl	Benazepril Hcl	158	48
Fluticasone Propionate	Fluticasone Propionate	137	63
Finasteride	Finasteride	127	38
Ozempic	Semaglutide	121	27
Pantoprazole Sodium	Pantoprazole Sodium	119	37
Albuterol Sulfate Hfa	Albuterol Sulfate	114	61
Pravastatin Sodium	Pravastatin Sodium	112	30
Fenofibrate	Fenofibrate	110	41
Famotidine	Famotidine	102	32
Allopurinol	Allopurinol	98	30
Trazodone Hcl	Trazodone Hcl	97	41
Jardiance	Empagliflozin	95	29
Gabapentin	Gabapentin	90	37
Mirtazapine	Mirtazapine	88	24
Spironolactone	Spironolactone	87	27
Tramadol Hcl	Tramadol Hcl	87	34
Zolpidem Tartrate	Zolpidem Tartrate	87	28
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	85	33
Azelastine Hcl	Azelastine Hcl	84	45
Simvastatin	Simvastatin	83	28
Furosemide	Furosemide	74	29
Donepezil Hcl	Donepezil Hcl	73	23
Sertraline Hcl	Sertraline Hcl	71	27
Ramipril	Ramipril	69	25
Metoprolol Succinate	Metoprolol Succinate	65	25
Carvedilol	Carvedilol	63	22
Eliquis	Apixaban	63	17
Potassium Chloride	Potassium Chloride	61	22
Synthroid	Levothyroxine Sodium	61	18
Duloxetine Hcl	Duloxetine Hcl	59	23
Clopidogrel	Clopidogrel Bisulfate	58	16
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	56	23
Diclofenac Sodium	Diclofenac Sodium	54	29
Alendronate Sodium	Alendronate Sodium	51	16
Pioglitazone Hcl	Pioglitazone Hcl	51	19
Lorazepam	Lorazepam	46	18
Sildenafil Citrate	Sildenafil Citrate	46	suppressed
Spironolactone-Hctz	Spironolact/Hydrochlorothiazid	45	16
Citalopram Hbr	Citalopram Hydrobromide	42	13
Escitalopram Oxalate	Escitalopram Oxalate	42	20
Oxybutynin Chloride Er	Oxybutynin Chloride	41	16
Triamcinolone Acetonide	Triamcinolone Acetonide	41	19
Prednisone	Prednisone	40	23
Valsartan	Valsartan	40	14
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	39	13
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	38	30
Farxiga	Dapagliflozin Propanediol	37	12
Alprazolam	Alprazolam	36	15
Fluoxetine Hcl	Fluoxetine Hcl	36	13
Montelukast Sodium	Montelukast Sodium	36	14
Quetiapine Fumarate	Quetiapine Fumarate	34	suppressed
Atenolol	Atenolol	33	14
Ipratropium Bromide	Ipratropium Bromide	33	14
Bupropion Xl	Bupropion Hcl	32	11
Memantine Hcl	Memantine Hcl	31	13
Clonidine Hcl	Clonidine Hcl	30	13
Metoprolol Tartrate	Metoprolol Tartrate	30	16
Fenofibrate	Fenofibrate Nanocrystallized	29	suppressed
Glipizide Er	Glipizide	29	11
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	28	suppressed
Olanzapine	Olanzapine	28	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	27	12
Ondansetron Hcl	Ondansetron Hcl	27	suppressed
Benazepril-Hydrochlorothiazide	Benazepril/Hydrochlorothiazide	25	suppressed
Bupropion Hcl Sr	Bupropion Hcl	25	11
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	25	suppressed
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	24	11
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	24	suppressed
Doxepin Hcl	Doxepin Hcl	24	suppressed
Valacyclovir	Valacyclovir Hcl	24	11
Folic Acid	Folic Acid	22	suppressed
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	22	11
Paroxetine Hcl	Paroxetine Hcl	22	suppressed
Azithromycin	Azithromycin	21	21
Methocarbamol	Methocarbamol	21	suppressed
Cephalexin	Cephalexin	20	19
Felodipine Er	Felodipine	20	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	20	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	20	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	19	suppressed
Cilostazol	Cilostazol	19	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	19	16
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	19	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	18	16
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	18	suppressed
Trulicity	Dulaglutide	18	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	17	suppressed
Belsomra	Suvorexant	17	suppressed
Januvia	Sitagliptin Phosphate	17	suppressed
Niacin Er	Niacin	17	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	17	16
Baclofen	Baclofen	16	suppressed
Dextroamphetamine Sulfate	Dextroamphetamine Sulfate	16	suppressed
Divalproex Sodium	Divalproex Sodium	16	suppressed
Naproxen	Naproxen	16	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	16	suppressed
Raloxifene Hcl	Raloxifene Hcl	16	suppressed
Rybelsus	Semaglutide	16	suppressed
Irbesartan	Irbesartan	15	suppressed
Lovastatin	Lovastatin	15	suppressed
Donepezil Hcl Odt	Donepezil Hcl	14	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	14	suppressed
Glipizide	Glipizide	14	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	14	suppressed
Buspirone Hcl	Buspirone Hcl	13	suppressed
Latanoprost	Latanoprost	13	suppressed
Lidocaine	Lidocaine	13	suppressed
Morphine Sulfate Er	Morphine Sulfate	13	suppressed
Myrbetriq	Mirabegron	13	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	13	13
Terazosin Hcl	Terazosin Hcl	13	suppressed
Dulera	Mometasone/Formoterol	12	suppressed
Levetiracetam	Levetiracetam	12	suppressed
Tolterodine Tartrate Er	Tolterodine Tartrate	12	suppressed
Venlafaxine Besylate Er	Venlafaxine Besylate	12	suppressed
Acyclovir	Acyclovir	11	suppressed
Bumetanide	Bumetanide	11	suppressed
Hydrocortisone	Hydrocortisone	11	suppressed
Ibuprofen	Ibuprofen	11	suppressed
Spiriva Handihaler	Tiotropium Bromide	11	suppressed
Telmisartan	Telmisartan	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