Healthcare provider profile · identity verified

Chi Cheung, M.D.

Internal Medicine · ADAMS, MA · NPI 1851373773

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	625	159
Amlodipine Besylate	Amlodipine Besylate	586	151
Omeprazole	Omeprazole	561	146
Metoprolol Succinate	Metoprolol Succinate	524	140
Losartan Potassium	Losartan Potassium	391	101
Lisinopril	Lisinopril	352	99
Lorazepam	Lorazepam	348	77
Furosemide	Furosemide	328	88
Levothyroxine Sodium	Levothyroxine Sodium	322	76
Gabapentin	Gabapentin	255	57
Metformin Hcl	Metformin Hcl	255	72
Lovastatin	Lovastatin	246	65
Oxycodone Hcl	Oxycodone Hcl	239	30
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	207	30
Jardiance	Empagliflozin	199	39
Tamsulosin Hcl	Tamsulosin Hcl	187	42
Zolpidem Tartrate	Zolpidem Tartrate	169	29
Eliquis	Apixaban	166	33
Albuterol Sulfate Hfa	Albuterol Sulfate	163	45
Clopidogrel	Clopidogrel Bisulfate	149	37
Famotidine	Famotidine	148	47
Sertraline Hcl	Sertraline Hcl	142	32
Escitalopram Oxalate	Escitalopram Oxalate	139	33
Hydrochlorothiazide	Hydrochlorothiazide	139	42
Celecoxib	Celecoxib	137	40
Alprazolam	Alprazolam	134	24
Simvastatin	Simvastatin	134	35
Alendronate Sodium	Alendronate Sodium	128	32
Glimepiride	Glimepiride	126	33
Allopurinol	Allopurinol	125	31
Tramadol Hcl	Tramadol Hcl	123	35
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	118	25
Atenolol	Atenolol	108	26
Pioglitazone Hcl	Pioglitazone Hcl	108	23
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	105	15
Clonazepam	Clonazepam	104	23
Mirtazapine	Mirtazapine	104	28
Chlorthalidone	Chlorthalidone	100	26
Doxycycline Monohydrate	Doxycycline Monohydrate	100	82
Trazodone Hcl	Trazodone Hcl	96	25
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	95	29
Pantoprazole Sodium	Pantoprazole Sodium	91	28
Potassium Chloride	Potassium Chloride	90	23
Rosuvastatin Calcium	Rosuvastatin Calcium	90	33
Doxazosin Mesylate	Doxazosin Mesylate	82	23
Paroxetine Hcl	Paroxetine Hcl	80	20
Lamotrigine	Lamotrigine	78	suppressed
Prednisone	Prednisone	78	45
Finasteride	Finasteride	77	24
Metformin Hcl Er	Metformin Hcl	77	19
Mounjaro	Tirzepatide	77	12
Citalopram Hbr	Citalopram Hydrobromide	76	22
Januvia	Sitagliptin Phosphate	74	14
Donepezil Hcl	Donepezil Hcl	72	17
Fentanyl	Fentanyl	72	suppressed
Metoprolol Tartrate	Metoprolol Tartrate	70	21
Tradjenta	Linagliptin	69	14
Warfarin Sodium	Warfarin Sodium	69	17
Quetiapine Fumarate	Quetiapine Fumarate	65	suppressed
Spironolactone	Spironolactone	64	20
Bupropion Xl	Bupropion Hcl	63	14
Ciprofloxacin Hcl	Ciprofloxacin Hcl	61	47
Fluoxetine Hcl	Fluoxetine Hcl	60	12
Duloxetine Hcl	Duloxetine Hcl	58	13
Fluticasone Propionate	Fluticasone Propionate	58	22
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	57	17
Levetiracetam	Levetiracetam	56	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	55	12
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	54	15
Ozempic	Semaglutide	52	suppressed
Ibuprofen	Ibuprofen	51	18
Trulicity	Dulaglutide	51	suppressed
Ventolin Hfa	Albuterol Sulfate	51	18
Bupropion Hcl Sr	Bupropion Hcl	50	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	46	suppressed
Carvedilol	Carvedilol	46	15
Pregabalin	Pregabalin	46	12
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	46	suppressed
Breo Ellipta	Fluticasone/Vilanterol	45	suppressed
Ropinirole Hcl	Ropinirole Hcl	45	suppressed
Diazepam	Diazepam	43	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	43	12
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	43	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	42	suppressed
Synthroid	Levothyroxine Sodium	42	suppressed
Benazepril Hcl	Benazepril Hcl	40	suppressed
Ezetimibe	Ezetimibe	39	14
Ondansetron Hcl	Ondansetron Hcl	39	suppressed
Pravastatin Sodium	Pravastatin Sodium	39	13
Triamcinolone Acetonide	Triamcinolone Acetonide	39	18
Xarelto	Rivaroxaban	39	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	38	suppressed
Farxiga	Dapagliflozin Propanediol	37	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	37	suppressed
Buspirone Hcl	Buspirone Hcl	36	suppressed
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	36	suppressed
Montelukast Sodium	Montelukast Sodium	36	13
Azithromycin	Azithromycin	35	32
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	35	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	35	suppressed
Valsartan	Valsartan	34	12
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	33	31
Cilostazol	Cilostazol	33	suppressed
Testosterone	Testosterone	33	suppressed
Tizanidine Hcl	Tizanidine Hcl	32	suppressed
Symbicort	Budesonide/Formoterol Fumarate	31	suppressed
Clonidine Hcl	Clonidine Hcl	28	suppressed
Torsemide	Torsemide	28	suppressed
Levofloxacin	Levofloxacin	27	22
Diclofenac Sodium	Diclofenac Sodium	26	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	25	suppressed
Morphine Sulfate Er	Morphine Sulfate	25	suppressed
Nystatin	Nystatin	25	14
Paxlovid	Nirmatrelvir/Ritonavir	25	25
Atenolol-Chlorthalidone	Atenolol/Chlorthalidone	24	suppressed
Carbamazepine	Carbamazepine	24	suppressed
Bumetanide	Bumetanide	23	suppressed
Hydromorphone Hcl	Hydromorphone Hcl	23	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	23	22
Meloxicam	Meloxicam	22	suppressed
Olanzapine	Olanzapine	22	suppressed
Fluconazole	Fluconazole	21	12
Propranolol Hcl Er	Propranolol Hcl	21	suppressed
Terazosin Hcl	Terazosin Hcl	21	suppressed
Topiramate	Topiramate	21	suppressed
Baclofen	Baclofen	20	suppressed
Meclizine Hcl	Meclizine Hcl	20	suppressed
Morphine Sulfate	Morphine Sulfate	19	suppressed
Oxycontin	Oxycodone Hcl	19	suppressed
Pitavastatin Calcium	Pitavastatin Calcium	19	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	19	suppressed
Propranolol Hcl	Propranolol Hcl	19	suppressed
Azelastine Hcl	Azelastine Hcl	18	suppressed
Carisoprodol	Carisoprodol	18	suppressed
Creon	Lipase/Protease/Amylase	18	suppressed
Glipizide	Glipizide	18	suppressed
Doxepin Hcl	Doxepin Hcl	17	suppressed
Enalapril Maleate	Enalapril Maleate	17	suppressed
Entresto	Sacubitril/Valsartan	17	suppressed
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	16	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	16	suppressed
Econazole Nitrate	Econazole Nitrate	15	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	15	suppressed
Acyclovir	Acyclovir	14	suppressed
Buprenorphine	Buprenorphine	14	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	14	suppressed
Janumet	Sitagliptin Phos/Metformin Hcl	14	suppressed
Nitroglycerin	Nitroglycerin	14	suppressed
Prazosin Hcl	Prazosin Hcl	14	suppressed
Tobramycin	Tobramycin	14	13
Acetaminophen-Codeine	Acetaminophen With Codeine	13	suppressed
Hydralazine Hcl	Hydralazine Hcl	13	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	13	11
Praluent Pen	Alirocumab	13	suppressed
Testosterone Cypionate	Testosterone Cypionate	13	suppressed
Bupropion Hcl	Bupropion Hcl	12	suppressed
Emsam	Selegiline	12	suppressed
Humalog Mix 75-25 Kwikpen	Insulin Lispro Protamin/Lispro	12	suppressed
Invokamet	Canagliflozin/Metformin Hcl	12	suppressed
Amoxicillin	Amoxicillin	11	11
Esomeprazole Magnesium	Esomeprazole Magnesium	11	suppressed
Estradiol	Estradiol	11	suppressed
Fenofibrate	Fenofibrate	11	suppressed
Glyburide	Glyburide	11	suppressed
Sucralfate	Sucralfate	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