Healthcare provider profile · identity verified

Carranda Koop, M.D.

Internal Medicine · HOWELL, MI · NPI 1023437456

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	726	204
Levothyroxine Sodium	Levothyroxine Sodium	547	147
Amlodipine Besylate	Amlodipine Besylate	405	114
Losartan Potassium	Losartan Potassium	327	101
Lisinopril	Lisinopril	290	89
Omeprazole	Omeprazole	269	78
Metoprolol Succinate	Metoprolol Succinate	218	67
Metformin Hcl	Metformin Hcl	181	61
Hydrochlorothiazide	Hydrochlorothiazide	175	52
Rosuvastatin Calcium	Rosuvastatin Calcium	169	47
Furosemide	Furosemide	149	46
Olmesartan Medoxomil	Olmesartan Medoxomil	144	43
Trazodone Hcl	Trazodone Hcl	144	46
Gabapentin	Gabapentin	130	48
Metoprolol Tartrate	Metoprolol Tartrate	130	35
Albuterol Sulfate Hfa	Albuterol Sulfate	125	47
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	117	18
Simvastatin	Simvastatin	114	33
Sertraline Hcl	Sertraline Hcl	112	33
Bupropion Xl	Bupropion Hcl	107	33
Eliquis	Apixaban	102	28
Pantoprazole Sodium	Pantoprazole Sodium	96	27
Glipizide Er	Glipizide	95	27
Pravastatin Sodium	Pravastatin Sodium	93	24
Citalopram Hbr	Citalopram Hydrobromide	92	27
Duloxetine Hcl	Duloxetine Hcl	90	34
Ibandronate Sodium	Ibandronate Sodium	84	30
Montelukast Sodium	Montelukast Sodium	84	27
Alendronate Sodium	Alendronate Sodium	82	28
Metformin Hcl Er	Metformin Hcl	80	22
Potassium Chloride	Potassium Chloride	74	17
Tamsulosin Hcl	Tamsulosin Hcl	68	22
Ezetimibe	Ezetimibe	65	20
Carvedilol	Carvedilol	64	14
Escitalopram Oxalate	Escitalopram Oxalate	63	19
Famotidine	Famotidine	63	22
Allopurinol	Allopurinol	61	15
Fluoxetine Hcl	Fluoxetine Hcl	61	17
Fluticasone Propionate	Fluticasone Propionate	59	24
Valacyclovir	Valacyclovir Hcl	58	17
Venlafaxine Hcl Er	Venlafaxine Hcl	58	20
Tramadol Hcl	Tramadol Hcl	54	12
Mounjaro	Tirzepatide	53	suppressed
Pregabalin	Pregabalin	51	11
Alprazolam	Alprazolam	50	15
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	49	17
Meloxicam	Meloxicam	49	18
Warfarin Sodium	Warfarin Sodium	48	14
Chlorthalidone	Chlorthalidone	47	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	46	12
Jardiance	Empagliflozin	46	13
Ozempic	Semaglutide	45	11
Oxybutynin Chloride Er	Oxybutynin Chloride	44	11
Spironolactone	Spironolactone	44	18
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	41	16
Atenolol	Atenolol	40	13
Januvia	Sitagliptin Phosphate	39	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	38	suppressed
Clopidogrel	Clopidogrel Bisulfate	37	13
Lorazepam	Lorazepam	37	suppressed
Glipizide	Glipizide	35	suppressed
Buspirone Hcl	Buspirone Hcl	34	12
Lovastatin	Lovastatin	34	11
Valsartan	Valsartan	33	suppressed
Synthroid	Levothyroxine Sodium	32	suppressed
Xarelto	Rivaroxaban	32	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	31	suppressed
Paroxetine Hcl	Paroxetine Hcl	31	suppressed
Ropinirole Hcl	Ropinirole Hcl	31	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	30	suppressed
Hydralazine Hcl	Hydralazine Hcl	29	suppressed
Jantoven	Warfarin Sodium	29	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	28	12
Propranolol Hcl Er	Propranolol Hcl	28	suppressed
Clonazepam	Clonazepam	27	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	27	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	27	suppressed
Meclizine Hcl	Meclizine Hcl	27	suppressed
Celecoxib	Celecoxib	25	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	25	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	25	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	25	suppressed
Ketoconazole	Ketoconazole	25	22
Memantine Hcl	Memantine Hcl	24	suppressed
Donepezil Hcl	Donepezil Hcl	23	13
Trulicity	Dulaglutide	23	suppressed
Ventolin Hfa	Albuterol Sulfate	23	suppressed
Enalapril Maleate	Enalapril Maleate	22	suppressed
Prednisone	Prednisone	21	21
Irbesartan	Irbesartan	20	suppressed
Myrbetriq	Mirabegron	19	suppressed
Novolog Flexpen	Insulin Aspart	19	suppressed
Ipratropium Bromide	Ipratropium Bromide	18	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	18	suppressed
Estradiol	Estradiol	17	suppressed
Spiriva Handihaler	Tiotropium Bromide	17	suppressed
Bumetanide	Bumetanide	16	suppressed
Topiramate	Topiramate	16	suppressed
Azithromycin	Azithromycin	15	suppressed
Fluocinonide-E	Fluocinonide/Emollient Base	15	suppressed
Nystatin	Nystatin	15	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	15	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	15	suppressed
Tolterodine Tartrate Er	Tolterodine Tartrate	15	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	14	suppressed
Ibuprofen	Ibuprofen	14	suppressed
Methocarbamol	Methocarbamol	14	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	14	12
Triamcinolone Acetonide	Triamcinolone Acetonide	14	11
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	14	suppressed
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	14	suppressed
Cephalexin	Cephalexin	13	suppressed
Humalog	Insulin Lispro	13	suppressed
Levetiracetam	Levetiracetam	13	suppressed
Ondansetron Hcl	Ondansetron Hcl	13	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	12	12
Colestipol Hcl	Colestipol Hcl	12	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	12	suppressed
Levemir Flexpen	Insulin Detemir	12	suppressed
Loperamide	Loperamide Hcl	12	suppressed
Symbicort	Budesonide/Formoterol Fumarate	12	suppressed
Amoxicillin	Amoxicillin	11	suppressed
Clobetasol Propionate	Clobetasol Propionate	11	suppressed
Finasteride	Finasteride	11	suppressed
Propranolol Hcl	Propranolol Hcl	11	suppressed
Stiolto Respimat	Tiotropium Br/Olodaterol 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