Healthcare provider profile · identity verified

Manamar Singh, M.D

Internal Medicine · CHICAGO, IL · NPI 1770899221

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	639	132
Levothyroxine Sodium	Levothyroxine Sodium	483	109
Furosemide	Furosemide	479	144
Eliquis	Apixaban	413	95
Amlodipine Besylate	Amlodipine Besylate	380	99
Gabapentin	Gabapentin	349	76
Memantine Hcl	Memantine Hcl	328	42
Metoprolol Tartrate	Metoprolol Tartrate	324	77
Pantoprazole Sodium	Pantoprazole Sodium	323	90
Donepezil Hcl	Donepezil Hcl	273	42
Lisinopril	Lisinopril	225	43
Potassium Chloride	Potassium Chloride	225	62
Escitalopram Oxalate	Escitalopram Oxalate	204	42
Metoprolol Succinate	Metoprolol Succinate	190	52
Tamsulosin Hcl	Tamsulosin Hcl	190	51
Sertraline Hcl	Sertraline Hcl	188	39
Famotidine	Famotidine	183	47
Quetiapine Fumarate	Quetiapine Fumarate	183	46
Clopidogrel	Clopidogrel Bisulfate	182	43
Levetiracetam	Levetiracetam	181	27
Omeprazole	Omeprazole	165	42
Hydralazine Hcl	Hydralazine Hcl	158	38
Losartan Potassium	Losartan Potassium	152	48
Carvedilol	Carvedilol	150	56
Simvastatin	Simvastatin	149	28
Metformin Hcl	Metformin Hcl	125	35
Mirtazapine	Mirtazapine	111	25
Midodrine Hcl	Midodrine Hcl	109	25
Carbidopa-Levodopa	Carbidopa/Levodopa	106	16
Trazodone Hcl	Trazodone Hcl	99	25
Allopurinol	Allopurinol	98	27
Duloxetine Hcl	Duloxetine Hcl	98	22
Montelukast Sodium	Montelukast Sodium	93	26
Latanoprost	Latanoprost	90	27
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	86	20
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	82	31
Fluoxetine Hcl	Fluoxetine Hcl	76	13
Xarelto	Rivaroxaban	76	15
Jardiance	Empagliflozin	75	13
Divalproex Sodium	Divalproex Sodium	72	14
Amiodarone Hcl	Amiodarone Hcl	70	22
Enoxaparin Sodium	Enoxaparin Sodium	70	12
Baclofen	Baclofen	67	12
Rosuvastatin Calcium	Rosuvastatin Calcium	64	20
Ondansetron Hcl	Ondansetron Hcl	63	40
Lansoprazole	Lansoprazole	62	16
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	61	20
Spironolactone	Spironolactone	61	22
Entresto	Sacubitril/Valsartan	60	suppressed
Sucralfate	Sucralfate	60	12
Isosorbide Mononitrate Er	Isosorbide Mononitrate	58	11
Ropinirole Hcl	Ropinirole Hcl	56	suppressed
Myrbetriq	Mirabegron	55	11
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	54	31
Finasteride	Finasteride	53	14
Januvia	Sitagliptin Phosphate	53	suppressed
Bumetanide	Bumetanide	52	suppressed
Hydrochlorothiazide	Hydrochlorothiazide	52	15
Albuterol Sulfate Hfa	Albuterol Sulfate	51	27
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	51	18
Prednisone	Prednisone	48	24
Nystatin	Nystatin	47	27
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	46	14
Ezetimibe	Ezetimibe	45	13
Fluticasone Propionate	Fluticasone Propionate	45	16
Propranolol Hcl	Propranolol Hcl	43	suppressed
Scopolamine	Scopolamine	42	suppressed
Nystop	Nystatin	41	19
Citalopram Hbr	Citalopram Hydrobromide	39	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	39	suppressed
Levofloxacin	Levofloxacin	39	30
Nifedipine Er	Nifedipine	39	12
Bupropion Hcl	Bupropion Hcl	37	suppressed
Digoxin	Digoxin	37	13
Glipizide	Glipizide	37	11
Nitrofurantoin	Nitrofurantoin Macrocrystal	37	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	37	suppressed
Amantadine	Amantadine Hcl	36	suppressed
Carbamazepine	Carbamazepine	35	suppressed
Heparin Sodium	Heparin Sodium,porcine	35	suppressed
Buspirone Hcl	Buspirone Hcl	34	suppressed
Cefuroxime	Cefuroxime Axetil	33	29
Diltiazem 24hr Er (La)	Diltiazem Hcl	33	suppressed
Metoclopramide Hcl	Metoclopramide Hcl	33	suppressed
Risperidone	Risperidone	33	suppressed
Torsemide	Torsemide	32	suppressed
Alendronate Sodium	Alendronate Sodium	31	11
Metronidazole	Metronidazole	31	14
Fenofibrate	Fenofibrate	30	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	30	suppressed
Lamotrigine	Lamotrigine	29	suppressed
Pravastatin Sodium	Pravastatin Sodium	29	suppressed
Terazosin Hcl	Terazosin Hcl	27	suppressed
Neupro	Rotigotine	26	suppressed
Olanzapine	Olanzapine	26	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	26	suppressed
Glimepiride	Glimepiride	25	suppressed
Insulin Aspart Flexpen	Insulin Aspart	25	suppressed
Methenamine Hippurate	Methenamine Hippurate	25	suppressed
Novolog Flexpen	Insulin Aspart	25	suppressed
Albuterol Sulfate	Albuterol Sulfate	24	suppressed
Namzaric	Memantine Hcl/Donepezil Hcl	24	suppressed
Nuplazid	Pimavanserin Tartrate	23	suppressed
Alprazolam	Alprazolam	22	15
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	22	15
Clonidine Hcl	Clonidine Hcl	22	suppressed
Enulose	Lactulose	22	11
Hydroxyzine Hcl	Hydroxyzine Hcl	22	suppressed
Paroxetine Hcl	Paroxetine Hcl	22	suppressed
Brimonidine Tartrate	Brimonidine Tartrate	21	suppressed
Daptomycin	Daptomycin	21	suppressed
Meloxicam	Meloxicam	21	suppressed
Solifenacin Succinate	Solifenacin Succinate	21	suppressed
Tradjenta	Linagliptin	21	suppressed
Calcitriol	Calcitriol	20	suppressed
Metformin Hcl Er	Metformin Hcl	20	suppressed
Carbidopa-Levodopa Er	Carbidopa/Levodopa	19	suppressed
Diltiazem Hcl	Diltiazem Hcl	19	suppressed
Meclizine Hcl	Meclizine Hcl	19	14
Vancomycin Hcl	Vancomycin Hcl	19	suppressed
Autoshield Duo Pen Needle	Pen Needle,dual Safety,diabetc	18	suppressed
Breo Ellipta	Fluticasone/Vilanterol	18	suppressed
Fluconazole	Fluconazole	18	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	18	suppressed
Misoprostol	Misoprostol	18	suppressed
Tramadol Hcl	Tramadol Hcl	18	12
Colchicine	Colchicine	17	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	17	suppressed
Oxcarbazepine	Oxcarbazepine	17	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	17	suppressed
Metolazone	Metolazone	16	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	15	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	15	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	15	suppressed
Lidocaine	Lidocaine	15	suppressed
Liothyronine Sodium	Liothyronine Sodium	15	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	15	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	15	13
Warfarin Sodium	Warfarin Sodium	15	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	14	12
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	14	suppressed
Mirabegron Er	Mirabegron	14	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	14	suppressed
Spiriva Handihaler	Tiotropium Bromide	14	suppressed
Symbicort	Budesonide/Formoterol Fumarate	14	suppressed
Bupropion Xl	Bupropion Hcl	13	suppressed
Cefadroxil	Cefadroxil	13	suppressed
Dorzolamide Hcl	Dorzolamide Hcl	13	suppressed
Flecainide Acetate	Flecainide Acetate	13	suppressed
Fludrocortisone Acetate	Fludrocortisone Acetate	13	suppressed
Klor-Con 10	Potassium Chloride	13	suppressed
Paroxetine Mesylate	Paroxetine Mesylate	13	suppressed
Propranolol Hcl Er	Propranolol Hcl	13	suppressed
Verapamil Er	Verapamil Hcl	13	suppressed
Cefdinir	Cefdinir	12	suppressed
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	12	suppressed
Glucagon Emergency Kit	Glucagon	12	suppressed
Isosorbide Dinitrate	Isosorbide Dinitrate	12	suppressed
Klor-Con M20	Potassium Chloride	12	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	11	suppressed
Benazepril Hcl	Benazepril Hcl	11	suppressed
Bethanechol Chloride	Bethanechol Chloride	11	suppressed
Carbamazepine Er	Carbamazepine	11	suppressed
Clindamycin Hcl	Clindamycin Hcl	11	suppressed
Doxepin Hcl	Doxepin Hcl	11	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	11	suppressed
Glycopyrrolate	Glycopyrrolate	11	suppressed
Humalog	Insulin Lispro	11	suppressed
Lyumjev Kwikpen U-100	Insulin Lispro-Aabc	11	suppressed
Ozempic	Semaglutide	11	suppressed
Primidone	Primidone	11	suppressed
Silodosin	Silodosin	11	suppressed
Ursodiol	Ursodiol	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