Healthcare provider profile · identity verified

Douglas A Ambler, MD

Internal Medicine · WHEATON, IL · NPI 1154343689

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
Levothyroxine Sodium	Levothyroxine Sodium	543	117
Atorvastatin Calcium	Atorvastatin Calcium	501	117
Amlodipine Besylate	Amlodipine Besylate	409	88
Rosuvastatin Calcium	Rosuvastatin Calcium	292	107
Simvastatin	Simvastatin	217	54
Memantine Hcl	Memantine Hcl	203	26
Metoprolol Succinate	Metoprolol Succinate	202	55
Pantoprazole Sodium	Pantoprazole Sodium	195	52
Losartan Potassium	Losartan Potassium	194	51
Furosemide	Furosemide	191	47
Warfarin Sodium	Warfarin Sodium	183	11
Potassium Chloride	Potassium Chloride	180	41
Famotidine	Famotidine	166	24
Escitalopram Oxalate	Escitalopram Oxalate	162	39
Omeprazole	Omeprazole	159	31
Sertraline Hcl	Sertraline Hcl	152	31
Eliquis	Apixaban	145	30
Mirtazapine	Mirtazapine	138	18
Gabapentin	Gabapentin	118	27
Tamsulosin Hcl	Tamsulosin Hcl	117	33
Donepezil Hcl	Donepezil Hcl	107	15
Hydrochlorothiazide	Hydrochlorothiazide	100	36
Xarelto	Rivaroxaban	96	15
Torsemide	Torsemide	95	suppressed
Lisinopril	Lisinopril	91	23
Alprazolam	Alprazolam	90	32
Metformin Hcl	Metformin Hcl	78	25
Valsartan	Valsartan	78	25
Prednisone	Prednisone	77	18
Cephalexin	Cephalexin	73	31
Allopurinol	Allopurinol	72	23
Tramadol Hcl	Tramadol Hcl	72	22
Metoprolol Tartrate	Metoprolol Tartrate	70	17
Myrbetriq	Mirabegron	70	suppressed
Clopidogrel	Clopidogrel Bisulfate	66	12
Jardiance	Empagliflozin	64	12
Methenamine Hippurate	Methenamine Hippurate	63	12
Lorazepam	Lorazepam	61	19
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	61	25
Fluticasone Propionate	Fluticasone Propionate	60	18
Carvedilol	Carvedilol	57	15
Duloxetine Hcl	Duloxetine Hcl	57	12
Spironolactone	Spironolactone	57	13
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	54	18
Zolpidem Tartrate	Zolpidem Tartrate	54	24
Ezetimibe	Ezetimibe	52	17
Bupropion Xl	Bupropion Hcl	50	16
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	49	suppressed
Meloxicam	Meloxicam	49	16
Midodrine Hcl	Midodrine Hcl	49	12
Latanoprost	Latanoprost	48	suppressed
Montelukast Sodium	Montelukast Sodium	47	14
Trazodone Hcl	Trazodone Hcl	46	14
Olmesartan Medoxomil	Olmesartan Medoxomil	45	20
Citalopram Hbr	Citalopram Hydrobromide	42	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	41	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	41	34
Quetiapine Fumarate	Quetiapine Fumarate	41	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	38	12
Metformin Hcl Er	Metformin Hcl	38	13
Propranolol Hcl	Propranolol Hcl	37	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	37	14
Buspirone Hcl	Buspirone Hcl	36	suppressed
Glimepiride	Glimepiride	35	suppressed
Fludrocortisone Acetate	Fludrocortisone Acetate	34	suppressed
Synthroid	Levothyroxine Sodium	33	12
Clonazepam	Clonazepam	32	suppressed
Finasteride	Finasteride	32	14
Nystatin	Nystatin	31	18
Amiodarone Hcl	Amiodarone Hcl	30	suppressed
Bumetanide	Bumetanide	30	suppressed
Ezetimibe-Simvastatin	Ezetimibe/Simvastatin	30	suppressed
Rivastigmine	Rivastigmine	30	suppressed
Sodium Chloride	Sodium Chloride Irrig Solution	30	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	29	12
Rexulti	Brexpiprazole	29	suppressed
Mounjaro	Tirzepatide	28	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	28	18
Triamcinolone Acetonide	Triamcinolone Acetonide	28	14
Albuterol Sulfate Hfa	Albuterol Sulfate	27	18
Ondansetron Hcl	Ondansetron Hcl	27	suppressed
Levetiracetam	Levetiracetam	26	suppressed
Nabumetone	Nabumetone	26	suppressed
Ozempic	Semaglutide	26	suppressed
Alendronate Sodium	Alendronate Sodium	25	11
Methylprednisolone	Methylprednisolone	25	22
Breo Ellipta	Fluticasone/Vilanterol	24	suppressed
Brilinta	Ticagrelor	24	suppressed
Pravastatin Sodium	Pravastatin Sodium	24	suppressed
Gentamicin Sulfate	Gentamicin Sulfate	23	suppressed
Diazepam	Diazepam	22	suppressed
Memantine Hcl Er	Memantine Hcl	22	suppressed
Methotrexate	Methotrexate Sodium	22	suppressed
Zoloft	Sertraline Hcl	22	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	21	11
Dorzolamide-Timolol	Dorzolamide/Timolol/Pf	21	suppressed
Trulicity	Dulaglutide	21	suppressed
Brimonidine Tartrate	Brimonidine Tartrate	20	suppressed
Bupropion Hcl	Bupropion Hcl	20	suppressed
Irbesartan-Hydrochlorothiazide	Irbesartan/Hydrochlorothiazide	20	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	20	suppressed
Cefdinir	Cefdinir	19	19
Chlorthalidone	Chlorthalidone	19	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	19	suppressed
Hydralazine Hcl	Hydralazine Hcl	19	suppressed
Methylphenidate Hcl	Methylphenidate Hcl	19	suppressed
Estradiol	Estradiol	18	suppressed
Olmesartan-Hydrochlorothiazide	Olmesartan/Hydrochlorothiazide	18	suppressed
Pentasa	Mesalamine	18	suppressed
Amoxicillin	Amoxicillin	17	12
Ipratropium Bromide	Ipratropium Bromide	17	suppressed
Lacosamide	Lacosamide	17	suppressed
Propranolol Hcl Er	Propranolol Hcl	17	suppressed
Celecoxib	Celecoxib	16	suppressed
Enalapril Maleate	Enalapril Maleate	16	suppressed
Telmisartan	Telmisartan	16	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	15	suppressed
Colchicine	Colchicine	15	suppressed
Junel Fe	Norethindrone-E.Estradiol-Iron	15	suppressed
Paroxetine Hcl	Paroxetine Hcl	15	suppressed
Valacyclovir	Valacyclovir Hcl	15	suppressed
Atenolol	Atenolol	14	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	14	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	14	suppressed
Clonidine Hcl	Clonidine Hcl	13	suppressed
Hydrocortisone	Hydrocortisone	13	suppressed
Irbesartan	Irbesartan	13	suppressed
Ketoconazole	Ketoconazole	13	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	13	suppressed
Vancomycin Hcl	Vancomycin Hcl	13	suppressed
Benazepril Hcl	Benazepril Hcl	12	suppressed
Clonidine	Clonidine	12	suppressed
Dextroamphetamine-Amphet Er	Dextroamphetamine/Amphetamine	12	suppressed
Lovastatin	Lovastatin	12	suppressed
Oxycontin	Oxycodone Hcl	12	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	12	suppressed
Azithromycin	Azithromycin	11	suppressed
Desmopressin Acetate	Desmopressin Acetate	11	suppressed
Pyridostigmine Bromide	Pyridostigmine Bromide	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

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