Healthcare provider profile · identity verified

Heidi Regenass, M.D.

Internal Medicine · SANTA ANA, CA · NPI 1225258965

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	1328	354
Amlodipine Besylate	Amlodipine Besylate	750	221
Metformin Hcl	Metformin Hcl	743	236
Tamsulosin Hcl	Tamsulosin Hcl	576	156
Omeprazole	Omeprazole	539	146
Losartan Potassium	Losartan Potassium	482	119
Levothyroxine Sodium	Levothyroxine Sodium	445	116
Furosemide	Furosemide	420	128
Lisinopril	Lisinopril	401	125
Albuterol Sulfate Hfa	Albuterol Sulfate	399	142
Gabapentin	Gabapentin	379	145
Pantoprazole Sodium	Pantoprazole Sodium	302	86
Quetiapine Fumarate	Quetiapine Fumarate	270	72
Jardiance	Empagliflozin	265	77
Rosuvastatin Calcium	Rosuvastatin Calcium	250	74
Metoprolol Tartrate	Metoprolol Tartrate	237	74
Carvedilol	Carvedilol	229	75
Eliquis	Apixaban	220	67
Clopidogrel	Clopidogrel Bisulfate	219	64
Hydrochlorothiazide	Hydrochlorothiazide	213	63
Fluticasone Propionate	Fluticasone Propionate	208	58
Trazodone Hcl	Trazodone Hcl	200	59
Metoprolol Succinate	Metoprolol Succinate	199	60
Famotidine	Famotidine	193	62
Alendronate Sodium	Alendronate Sodium	192	51
Glipizide	Glipizide	186	54
Escitalopram Oxalate	Escitalopram Oxalate	168	49
Sertraline Hcl	Sertraline Hcl	164	42
Montelukast Sodium	Montelukast Sodium	155	43
Simvastatin	Simvastatin	154	53
Donepezil Hcl	Donepezil Hcl	147	40
Linzess	Linaclotide	142	41
Finasteride	Finasteride	135	44
Potassium Chloride	Potassium Chloride	129	39
Clonidine Hcl	Clonidine Hcl	123	51
Hydralazine Hcl	Hydralazine Hcl	123	39
Memantine Hcl	Memantine Hcl	118	33
Nitroglycerin	Nitroglycerin	118	45
Allopurinol	Allopurinol	114	33
Omeprazole-Sodium Bicarbonate	Omeprazole/Sodium Bicarbonate	114	28
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	111	48
Benazepril Hcl	Benazepril Hcl	109	33
Ozempic	Semaglutide	109	36
Janumet	Sitagliptin Phos/Metformin Hcl	102	18
Januvia	Sitagliptin Phosphate	101	33
Vascepa	Icosapent Ethyl	101	28
Aripiprazole	Aripiprazole	99	23
Metformin Hcl Er	Metformin Hcl	94	25
Latanoprost	Latanoprost	91	26
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	86	32
Mirtazapine	Mirtazapine	86	32
Ezetimibe	Ezetimibe	81	21
Xarelto	Rivaroxaban	81	23
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	76	16
Glimepiride	Glimepiride	75	25
Oxybutynin Chloride	Oxybutynin Chloride	74	18
Pioglitazone Hcl	Pioglitazone Hcl	74	21
Triamcinolone Acetonide	Triamcinolone Acetonide	68	29
Prednisone	Prednisone	67	26
Esomeprazole Magnesium	Esomeprazole Magnesium	65	14
Ibuprofen	Ibuprofen	65	38
Icosapent Ethyl	Icosapent Ethyl	60	21
Duloxetine Hcl	Duloxetine Hcl	59	15
Metformin Er Gastric	Metformin Hcl	59	18
Trulicity	Dulaglutide	59	18
Olanzapine	Olanzapine	58	17
Baclofen	Baclofen	56	22
Oxybutynin Chloride Er	Oxybutynin Chloride	56	16
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	55	25
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	55	17
Zolpidem Tartrate	Zolpidem Tartrate	53	22
Entresto	Sacubitril/Valsartan	51	21
Azelastine Hcl	Azelastine Hcl	50	15
Azithromycin	Azithromycin	50	35
Dutasteride	Dutasteride	49	suppressed
Omega-3 Acid Ethyl Esters	Omega-3 Acid Ethyl Esters	49	14
Amiodarone Hcl	Amiodarone Hcl	48	15
Comfort Ez Pen Needle	Pen Needle, Diabetic	48	24
Risperidone	Risperidone	48	13
Alcohol Prep Pads	Alcohol Antiseptic Pads	46	25
Brimonidine Tartrate	Brimonidine Tartrate	46	14
Pravastatin Sodium	Pravastatin Sodium	45	15
Ultra-Fine Nano Pen Needle	Pen Needle, Diabetic	43	23
Glipizide Er	Glipizide	42	12
Ventolin Hfa	Albuterol Sulfate	42	24
Levetiracetam	Levetiracetam	41	13
Atenolol	Atenolol	40	12
Colchicine	Colchicine	40	suppressed
Divalproex Sodium	Divalproex Sodium	39	11
Terazosin Hcl	Terazosin Hcl	39	suppressed
Methimazole	Methimazole	38	suppressed
Citalopram Hbr	Citalopram Hydrobromide	37	suppressed
Creon	Lipase/Protease/Amylase	37	suppressed
Lovastatin	Lovastatin	37	suppressed
Mounjaro	Tirzepatide	37	13
Chlorthalidone	Chlorthalidone	36	11
Diclofenac Sodium	Diclofenac Sodium	36	16
Trintellix	Vortioxetine Hydrobromide	35	suppressed
Myrbetriq	Mirabegron	34	suppressed
Fenofibrate	Fenofibrate	33	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	33	suppressed
Meloxicam	Meloxicam	32	20
Memantine Hcl Er	Memantine Hcl	32	14
Spironolactone	Spironolactone	32	20
Dexlansoprazole Dr	Dexlansoprazole	31	14
Farxiga	Dapagliflozin Propanediol	31	15
Nifedipine Er	Nifedipine	31	14
Ondansetron Hcl	Ondansetron Hcl	31	16
Ciprofloxacin Hcl	Ciprofloxacin Hcl	30	22
Pregabalin	Pregabalin	30	11
Propranolol Hcl	Propranolol Hcl	29	suppressed
Bupropion Hcl Sr	Bupropion Hcl	28	suppressed
Dorzolamide-Timolol	Dorzolamide Hcl/Timolol Maleat	28	11
Enalapril Maleate	Enalapril Maleate	28	suppressed
Hydrocortisone	Hydrocortisone	28	13
Loperamide	Loperamide Hcl	28	13
Nystatin	Nystatin	28	11
Cyclosporine	Cyclosporine	27	suppressed
Dihydroergotamine Mesylate	Dihydroergotamine Mesylate	27	suppressed
Novolog Flexpen	Insulin Aspart	27	suppressed
Synjardy	Empagliflozin/Metformin Hcl	27	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	26	suppressed
Paroxetine Hcl	Paroxetine Hcl	26	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	25	suppressed
Prazosin Hcl	Prazosin Hcl	25	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	25	20
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	25	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	24	16
Sucralfate	Sucralfate	24	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	23	suppressed
Ranolazine Er	Ranolazine	23	suppressed
Ketorolac Tromethamine	Ketorolac Tromethamine	22	suppressed
Promethazine Hcl	Promethazine Hcl	22	14
Restasis	Cyclosporine	22	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	22	suppressed
Breo Ellipta	Fluticasone/Vilanterol	21	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	21	suppressed
Fluocinonide	Fluocinonide	21	suppressed
Humulin N Kwikpen	Insulin Nph Human Isophane	21	suppressed
Valsartan	Valsartan	21	12
Bupropion Xl	Bupropion Hcl	20	suppressed
Cilostazol	Cilostazol	20	suppressed
Gemfibrozil	Gemfibrozil	20	suppressed
Spiriva Respimat	Tiotropium Bromide	20	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	20	suppressed
Amoxicillin	Amoxicillin	19	12
Bumetanide	Bumetanide	19	suppressed
Humalog Kwikpen U-100	Insulin Lispro	19	11
Lantus	Insulin Glargine,hum.Rec.Anlog	19	suppressed
Lumigan	Bimatoprost	19	suppressed
Repaglinide	Repaglinide	19	suppressed
Tradjenta	Linagliptin	19	11
Zenpep	Lipase/Protease/Amylase	19	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	18	suppressed
Clonazepam	Clonazepam	18	suppressed
Gemtesa	Vibegron	18	suppressed
Lansoprazole	Lansoprazole	18	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	18	suppressed
Methocarbamol	Methocarbamol	18	suppressed
Olmesartan-Hydrochlorothiazide	Olmesartan/Hydrochlorothiazide	18	suppressed
Prednisolone Acetate	Prednisolone Acetate	18	suppressed
Alfuzosin Hcl Er	Alfuzosin Hcl	17	suppressed
Buspirone Hcl	Buspirone Hcl	17	suppressed
Fenofibrate	Fenofibrate,micronized	17	suppressed
Glipizide-Metformin	Glipizide/Metformin Hcl	17	suppressed
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	17	suppressed
Lorazepam	Lorazepam	17	14
Sulfasalazine	Sulfasalazine	17	suppressed
Bisoprolol Fumarate	Bisoprolol Fumarate	16	suppressed
Brilinta	Ticagrelor	16	suppressed
Cephalexin	Cephalexin	16	14
Digoxin	Digoxin	16	suppressed
Ketoconazole	Ketoconazole	16	suppressed
Nebivolol Hcl	Nebivolol Hcl	16	suppressed
Repatha Sureclick	Evolocumab	16	suppressed
Dexilant	Dexlansoprazole	15	suppressed
Dorzolamide Hcl	Dorzolamide Hcl	15	suppressed
Humulin 70/30 Kwikpen	Insulin Nph Hum/Reg Insulin Hm	15	suppressed
Irbesartan	Irbesartan	15	suppressed
Lamotrigine	Lamotrigine	15	suppressed
Timolol Maleate	Timolol Maleate	15	suppressed
Tresiba Flextouch U-100	Insulin Degludec	15	suppressed
Verapamil Er	Verapamil Hcl	15	suppressed
Calcium Acetate	Calcium Acetate	14	suppressed
Carbamazepine	Carbamazepine	14	suppressed
Fluconazole	Fluconazole	14	suppressed
Naproxen	Naproxen	14	11
Raloxifene Hcl	Raloxifene Hcl	14	suppressed
Single Use Swab	Alcohol Antiseptic Pads	14	14
Triumeq	Abacavir/Dolutegravir/Lamivudi	14	suppressed
Diflorasone Diacetate	Diflorasone Diacetate	13	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	13	suppressed
Econazole Nitrate	Econazole Nitrate	13	suppressed
Glyxambi	Empagliflozin/Linagliptin	13	suppressed
Haloperidol	Haloperidol	13	suppressed
Humulin R	Insulin Regular, Human	13	suppressed
Tavaborole	Tavaborole	13	suppressed
Alprazolam	Alprazolam	12	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	12	suppressed
Chlorhexidine Gluconate	Chlorhexidine Gluconate	12	suppressed
Humalog	Insulin Lispro	12	suppressed
Meclizine Hcl	Meclizine Hcl	12	11
Mupirocin	Mupirocin	12	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	12	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	12	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	12	suppressed
Sevelamer Carbonate	Sevelamer Carbonate	12	suppressed
Alogliptin	Alogliptin Benzoate	11	suppressed
Carisoprodol	Carisoprodol	11	suppressed
Clonidine	Clonidine	11	suppressed
Clotrimazole	Clotrimazole	11	suppressed
Dayvigo	Lemborexant	11	suppressed
Diclofenac Potassium	Diclofenac Potassium	11	suppressed
Methylprednisolone	Methylprednisolone	11	suppressed
Nexlizet	Bempedoic Acid/Ezetimibe	11	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	11	suppressed
Ondansetron Odt	Ondansetron	11	suppressed
Prasugrel Hcl	Prasugrel Hcl	11	suppressed
Tizanidine Hcl	Tizanidine Hcl	11	suppressed
Venlafaxine Hcl	Venlafaxine Hcl	11	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	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