Healthcare provider profile · identity verified

Gregory T Koo, MD

General Practice · LEXINGTON, KY · NPI 1205895943

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
Omega-3 Acid Ethyl Esters	Omega-3 Acid Ethyl Esters	496	134
Atorvastatin Calcium	Atorvastatin Calcium	304	91
Amlodipine Besylate	Amlodipine Besylate	252	68
Lisinopril	Lisinopril	252	67
Omeprazole	Omeprazole	244	67
Potassium Chloride	Potassium Chloride	230	55
Levothyroxine Sodium	Levothyroxine Sodium	229	62
Losartan Potassium	Losartan Potassium	169	47
Mirtazapine	Mirtazapine	168	42
Meloxicam	Meloxicam	161	38
Furosemide	Furosemide	157	40
Pantoprazole Sodium	Pantoprazole Sodium	152	50
Rosuvastatin Calcium	Rosuvastatin Calcium	149	36
Fluticasone Propionate	Fluticasone Propionate	146	51
Metformin Hcl	Metformin Hcl	146	41
Ozempic	Semaglutide	133	23
Albuterol Sulfate Hfa	Albuterol Sulfate	126	39
Tizanidine Hcl	Tizanidine Hcl	117	25
Clopidogrel	Clopidogrel Bisulfate	98	27
Metoprolol Succinate	Metoprolol Succinate	97	27
Quetiapine Fumarate	Quetiapine Fumarate	93	19
Diclofenac Sodium	Diclofenac Sodium	92	31
Propranolol Hcl	Propranolol Hcl	91	21
Escitalopram Oxalate	Escitalopram Oxalate	88	26
Montelukast Sodium	Montelukast Sodium	85	26
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	85	22
Gabapentin	Gabapentin	84	21
Hydrochlorothiazide	Hydrochlorothiazide	83	22
Trazodone Hcl	Trazodone Hcl	81	25
Sertraline Hcl	Sertraline Hcl	76	15
Pravastatin Sodium	Pravastatin Sodium	70	22
Carvedilol	Carvedilol	66	22
Fluconazole	Fluconazole	65	36
Celecoxib	Celecoxib	64	18
Esomeprazole Magnesium	Esomeprazole Magnesium	64	15
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	64	17
Irbesartan	Irbesartan	61	16
Doxycycline Hyclate	Doxycycline Hyclate	60	54
Fluoxetine Hcl	Fluoxetine Hcl	55	16
Azithromycin	Azithromycin	49	42
Buspirone Hcl	Buspirone Hcl	49	11
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	49	15
Ropinirole Hcl	Ropinirole Hcl	49	14
Famotidine	Famotidine	48	13
Metoprolol Tartrate	Metoprolol Tartrate	48	17
Tamsulosin Hcl	Tamsulosin Hcl	48	16
Eliquis	Apixaban	47	suppressed
Finasteride	Finasteride	47	12
Simvastatin	Simvastatin	46	16
Allopurinol	Allopurinol	41	13
Jardiance	Empagliflozin	41	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	40	suppressed
Citalopram Hbr	Citalopram Hydrobromide	39	12
Paroxetine Hcl	Paroxetine Hcl	39	12
Amitriptyline Hcl	Amitriptyline Hcl	36	suppressed
Duloxetine Hcl	Duloxetine Hcl	36	11
Dicyclomine Hcl	Dicyclomine Hcl	35	16
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	35	12
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	33	suppressed
Ondansetron Odt	Ondansetron	33	20
Amoxicillin	Amoxicillin	32	27
Levofloxacin	Levofloxacin	32	24
Meclizine Hcl	Meclizine Hcl	32	14
Metformin Hcl Er	Metformin Hcl	31	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	31	21
Prednisone	Prednisone	31	17
Primidone	Primidone	31	suppressed
Donepezil Hcl	Donepezil Hcl	30	suppressed
Ibuprofen	Ibuprofen	29	suppressed
Spironolactone	Spironolactone	29	11
Baclofen	Baclofen	28	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	28	suppressed
Trulicity	Dulaglutide	28	suppressed
Tolterodine Tartrate Er	Tolterodine Tartrate	27	suppressed
Promethazine Hcl	Promethazine Hcl	26	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	26	18
Warfarin Sodium	Warfarin Sodium	26	suppressed
Atenolol	Atenolol	24	suppressed
Bupropion Hcl Sr	Bupropion Hcl	24	suppressed
Glimepiride	Glimepiride	24	suppressed
Methylprednisolone	Methylprednisolone	24	22
Mounjaro	Tirzepatide	24	suppressed
Valacyclovir	Valacyclovir Hcl	23	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	22	20
Naproxen	Naproxen	22	suppressed
Sucralfate	Sucralfate	21	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	20	suppressed
Nitroglycerin	Nitroglycerin	20	13
Folic Acid	Folic Acid	19	suppressed
Memantine Hcl	Memantine Hcl	19	suppressed
Nifedipine Er	Nifedipine	19	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	19	suppressed
Terazosin Hcl	Terazosin Hcl	19	suppressed
Tresiba Flextouch U-100	Insulin Degludec	19	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	18	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	18	suppressed
Benazepril Hcl	Benazepril Hcl	17	suppressed
Clonazepam	Clonazepam	17	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	17	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	17	suppressed
Vascepa	Icosapent Ethyl	17	suppressed
Cefdinir	Cefdinir	16	16
Comfort Ez Pen Needle	Pen Needle, Diabetic	16	suppressed
Ezetimibe	Ezetimibe	16	suppressed
Levetiracetam	Levetiracetam	16	suppressed
Mometasone Furoate	Mometasone Furoate	16	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	16	13
Divalproex Sodium Er	Divalproex Sodium	15	suppressed
Estradiol	Estradiol	15	suppressed
Fenofibrate	Fenofibrate	15	suppressed
Glipizide Er	Glipizide	15	suppressed
Synthroid	Levothyroxine Sodium	15	suppressed
Tramadol Hcl	Tramadol Hcl	15	suppressed
Ventolin Hfa	Albuterol Sulfate	15	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	14	13
Progesterone	Progesterone, Micronized	14	suppressed
Torsemide	Torsemide	14	suppressed
Verapamil Er	Verapamil Hcl	14	suppressed
Farxiga	Dapagliflozin Propanediol	13	suppressed
Ondansetron Hcl	Ondansetron Hcl	13	suppressed
Risperidone	Risperidone	13	suppressed
Alendronate Sodium	Alendronate Sodium	12	suppressed
Aripiprazole	Aripiprazole	12	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	12	suppressed
Clindamycin Phosphate	Clindamycin Phosphate	12	suppressed
Clonidine Hcl	Clonidine Hcl	12	suppressed
Diazepam	Diazepam	12	suppressed
Hydrocortisone	Hydrocortisone	12	suppressed
Indomethacin	Indomethacin	12	11
Labetalol Hcl	Labetalol Hcl	12	suppressed
Linzess	Linaclotide	12	suppressed
Methocarbamol	Methocarbamol	12	suppressed
Metoprolol-Hydrochlorothiazide	Metoprolol/Hydrochlorothiazide	12	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	11	suppressed
Chlorzoxazone	Chlorzoxazone	11	suppressed
Hydralazine Hcl	Hydralazine Hcl	11	suppressed
Lansoprazole	Lansoprazole	11	suppressed
Ofloxacin	Ofloxacin	11	11

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