Healthcare provider profile · identity verified

Zachary A. Flake, MD

Family Practice · LOVELAND, CO · NPI 1912946377

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	619	170
Levothyroxine Sodium	Levothyroxine Sodium	526	131
Amlodipine Besylate	Amlodipine Besylate	403	115
Lisinopril	Lisinopril	358	103
Omeprazole	Omeprazole	322	92
Simvastatin	Simvastatin	320	84
Hydrochlorothiazide	Hydrochlorothiazide	300	77
Tamsulosin Hcl	Tamsulosin Hcl	265	73
Losartan Potassium	Losartan Potassium	247	62
Sertraline Hcl	Sertraline Hcl	236	57
Metformin Hcl	Metformin Hcl	231	62
Lorazepam	Lorazepam	210	45
Gabapentin	Gabapentin	191	54
Trazodone Hcl	Trazodone Hcl	175	49
Rosuvastatin Calcium	Rosuvastatin Calcium	173	44
Zolpidem Tartrate	Zolpidem Tartrate	171	35
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	166	26
Alendronate Sodium	Alendronate Sodium	165	40
Allopurinol	Allopurinol	159	41
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	147	41
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	143	56
Pantoprazole Sodium	Pantoprazole Sodium	125	38
Tramadol Hcl	Tramadol Hcl	119	30
Metoprolol Succinate	Metoprolol Succinate	115	32
Prednisone	Prednisone	115	54
Furosemide	Furosemide	100	37
Alprazolam	Alprazolam	98	21
Metoprolol Tartrate	Metoprolol Tartrate	98	30
Warfarin Sodium	Warfarin Sodium	95	19
Atenolol	Atenolol	92	21
Montelukast Sodium	Montelukast Sodium	92	25
Finasteride	Finasteride	89	21
Citalopram Hbr	Citalopram Hydrobromide	81	20
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	81	18
Clonazepam	Clonazepam	78	13
Albuterol Sulfate Hfa	Albuterol Sulfate	71	40
Potassium Chloride	Potassium Chloride	70	17
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	68	27
Glimepiride	Glimepiride	66	17
Escitalopram Oxalate	Escitalopram Oxalate	64	19
Fluoxetine Hcl	Fluoxetine Hcl	62	20
Lovastatin	Lovastatin	62	14
Duloxetine Hcl	Duloxetine Hcl	58	12
Aripiprazole	Aripiprazole	56	15
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	54	12
Fluticasone Propionate	Fluticasone Propionate	50	18
Synthroid	Levothyroxine Sodium	50	11
Amoxicillin	Amoxicillin	48	42
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	48	32
Bupropion Xl	Bupropion Hcl	47	14
Venlafaxine Hcl Er	Venlafaxine Hcl	44	suppressed
Metformin Hcl Er	Metformin Hcl	42	13
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	42	26
Propranolol Hcl	Propranolol Hcl	40	suppressed
Ropinirole Hcl	Ropinirole Hcl	40	suppressed
Tizanidine Hcl	Tizanidine Hcl	40	suppressed
Solifenacin Succinate	Solifenacin Succinate	38	suppressed
Cephalexin	Cephalexin	37	27
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	37	suppressed
Ozempic	Semaglutide	37	suppressed
Valacyclovir	Valacyclovir Hcl	37	13
Diazepam	Diazepam	35	suppressed
Meloxicam	Meloxicam	35	12
Quetiapine Fumarate	Quetiapine Fumarate	35	suppressed
Carvedilol	Carvedilol	33	13
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	33	suppressed
Famotidine	Famotidine	33	suppressed
Jardiance	Empagliflozin	31	suppressed
Pravastatin Sodium	Pravastatin Sodium	31	suppressed
Azithromycin	Azithromycin	30	25
Paroxetine Hcl	Paroxetine Hcl	30	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	30	suppressed
Clopidogrel	Clopidogrel Bisulfate	29	14
Enalapril Maleate	Enalapril Maleate	29	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	29	suppressed
Symbicort	Budesonide/Formoterol Fumarate	29	suppressed
Estradiol	Estradiol	28	suppressed
Januvia	Sitagliptin Phosphate	28	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	27	suppressed
Lamotrigine	Lamotrigine	27	suppressed
Baclofen	Baclofen	26	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	26	suppressed
Eliquis	Apixaban	25	suppressed
Ezetimibe	Ezetimibe	25	suppressed
Fenofibrate	Fenofibrate	24	suppressed
Glipizide Er	Glipizide	24	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	24	suppressed
Testosterone Cypionate	Testosterone Cypionate	24	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	23	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	22	suppressed
Glipizide	Glipizide	21	suppressed
Morphine Sulfate Er	Morphine Sulfate	21	suppressed
Oxycodone Hcl	Oxycodone Hcl	21	suppressed
Pregabalin	Pregabalin	20	suppressed
Promethazine Hcl	Promethazine Hcl	20	suppressed
Xarelto	Rivaroxaban	20	suppressed
Bupropion Hcl Sr	Bupropion Hcl	19	suppressed
Donepezil Hcl	Donepezil Hcl	19	suppressed
Ibuprofen	Ibuprofen	18	suppressed
Sildenafil Citrate	Sildenafil Citrate	18	suppressed
Meclizine Hcl	Meclizine Hcl	17	12
Budesonide-Formoterol Fumarate	Budesonide/Formoterol Fumarate	16	suppressed
Clonidine Hcl	Clonidine Hcl	16	suppressed
Ondansetron Hcl	Ondansetron Hcl	16	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	16	16
Amitriptyline Hcl	Amitriptyline Hcl	15	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	15	13
Metronidazole	Metronidazole	15	suppressed
Mirtazapine	Mirtazapine	15	suppressed
Mounjaro	Tirzepatide	15	suppressed
Ondansetron Odt	Ondansetron	15	suppressed
Scopolamine	Scopolamine	15	suppressed
Buspirone Hcl	Buspirone Hcl	14	suppressed
Humalog Kwikpen U-100	Insulin Lispro	14	suppressed
Clobetasol Propionate	Clobetasol Propionate	13	suppressed
Doxycycline Monohydrate	Doxycycline Monohydrate	13	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	13	suppressed
Nystatin	Nystatin	13	suppressed
Spiriva Respimat	Tiotropium Bromide	13	suppressed
Trulicity	Dulaglutide	13	suppressed
Verapamil Er	Verapamil Hcl	13	suppressed
Acyclovir	Acyclovir	12	suppressed
Celecoxib	Celecoxib	12	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	12	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	11	suppressed
Fesoterodine Fumarate Er	Fesoterodine Fumarate	11	suppressed
Indomethacin	Indomethacin	11	suppressed
Ipratropium Bromide	Ipratropium Bromide	11	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	11	suppressed
Temazepam	Temazepam	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