Healthcare provider profile · identity verified

Channing C Wiersema, MD

Family Practice · PLOVER, WI · NPI 1457416166

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	390	110
Amlodipine Besylate	Amlodipine Besylate	289	81
Lisinopril	Lisinopril	236	67
Metoprolol Succinate	Metoprolol Succinate	229	68
Levothyroxine Sodium	Levothyroxine Sodium	206	58
Losartan Potassium	Losartan Potassium	189	56
Albuterol Sulfate Hfa	Albuterol Sulfate	176	53
Pantoprazole Sodium	Pantoprazole Sodium	169	45
Gabapentin	Gabapentin	132	36
Tamsulosin Hcl	Tamsulosin Hcl	129	33
Metformin Hcl	Metformin Hcl	124	33
Montelukast Sodium	Montelukast Sodium	124	28
Simvastatin	Simvastatin	121	31
Duloxetine Hcl	Duloxetine Hcl	120	24
Omeprazole	Omeprazole	120	36
Sertraline Hcl	Sertraline Hcl	110	24
Metoprolol Tartrate	Metoprolol Tartrate	101	27
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	99	30
Metformin Hcl Er	Metformin Hcl	98	30
Allopurinol	Allopurinol	95	28
Rosuvastatin Calcium	Rosuvastatin Calcium	84	28
Trazodone Hcl	Trazodone Hcl	84	23
Eliquis	Apixaban	83	19
Furosemide	Furosemide	81	27
Meloxicam	Meloxicam	78	24
Hydroxyzine Hcl	Hydroxyzine Hcl	75	22
Tizanidine Hcl	Tizanidine Hcl	73	16
Hydrochlorothiazide	Hydrochlorothiazide	72	24
Famotidine	Famotidine	71	25
Potassium Chloride	Potassium Chloride	69	19
Bupropion Xl	Bupropion Hcl	67	20
Fluticasone Propionate	Fluticasone Propionate	67	25
Warfarin Sodium	Warfarin Sodium	64	15
Prednisone	Prednisone	62	21
Pregabalin	Pregabalin	60	14
Pravastatin Sodium	Pravastatin Sodium	58	15
Dutasteride	Dutasteride	52	12
Finasteride	Finasteride	52	suppressed
Glipizide Er	Glipizide	51	15
Spironolactone	Spironolactone	50	13
Buspirone Hcl	Buspirone Hcl	48	13
Citalopram Hbr	Citalopram Hydrobromide	47	11
Escitalopram Oxalate	Escitalopram Oxalate	47	14
Mounjaro	Tirzepatide	47	suppressed
Farxiga	Dapagliflozin Propanediol	46	12
Lovastatin	Lovastatin	45	13
Ozempic	Semaglutide	45	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	44	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	44	22
Fluoxetine Hcl	Fluoxetine Hcl	43	12
Carvedilol	Carvedilol	41	13
Clonidine Hcl	Clonidine Hcl	40	suppressed
Ropinirole Hcl	Ropinirole Hcl	40	15
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	38	13
Clopidogrel	Clopidogrel Bisulfate	37	11
Ondansetron Odt	Ondansetron	37	13
Diclofenac Sodium	Diclofenac Sodium	36	13
Mirtazapine	Mirtazapine	36	13
Trulicity	Dulaglutide	36	suppressed
Rybelsus	Semaglutide	35	suppressed
Chlorthalidone	Chlorthalidone	34	suppressed
Irbesartan	Irbesartan	34	suppressed
Tolterodine Tartrate Er	Tolterodine Tartrate	33	suppressed
Tramadol Hcl	Tramadol Hcl	33	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	32	11
Glipizide	Glipizide	31	suppressed
Synthroid	Levothyroxine Sodium	28	suppressed
Baclofen	Baclofen	26	suppressed
Bupropion Hcl Sr	Bupropion Hcl	26	suppressed
Januvia	Sitagliptin Phosphate	26	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	26	suppressed
Amoxicillin	Amoxicillin	25	21
Atenolol	Atenolol	25	suppressed
Fluconazole	Fluconazole	25	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	25	suppressed
Memantine Hcl	Memantine Hcl	25	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	24	suppressed
Topiramate	Topiramate	24	suppressed
Ventolin Hfa	Albuterol Sulfate	23	11
Alendronate Sodium	Alendronate Sodium	22	suppressed
Nabumetone	Nabumetone	22	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	22	17
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	21	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	20	suppressed
Solifenacin Succinate	Solifenacin Succinate	20	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	20	suppressed
Jardiance	Empagliflozin	19	suppressed
Lamotrigine	Lamotrigine	19	suppressed
Paroxetine Hcl	Paroxetine Hcl	19	suppressed
Propranolol Hcl Er	Propranolol Hcl	19	suppressed
Sucralfate	Sucralfate	19	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	19	suppressed
Azelastine Hcl	Azelastine Hcl	18	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	18	suppressed
Epinephrine	Epinephrine	18	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	18	suppressed
Fenofibrate	Fenofibrate	17	suppressed
Omega-3 Acid Ethyl Esters	Omega-3 Acid Ethyl Esters	17	suppressed
Creon	Lipase/Protease/Amylase	16	suppressed
Enalapril Maleate	Enalapril Maleate	16	suppressed
Incruse Ellipta	Umeclidinium Bromide	16	suppressed
Tradjenta	Linagliptin	16	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	15	13
Ezetimibe	Ezetimibe	15	suppressed
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	15	suppressed
Ketoconazole	Ketoconazole	15	suppressed
Oxycodone Hcl	Oxycodone Hcl	15	suppressed
Celecoxib	Celecoxib	14	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	14	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	14	suppressed
Linzess	Linaclotide	14	suppressed
Nystatin	Nystatin	14	suppressed
Ondansetron Hcl	Ondansetron Hcl	14	suppressed
Valsartan	Valsartan	14	suppressed
Azithromycin	Azithromycin	13	11
Betamethasone Dipropionate	Betamethasone Dipropionate	13	suppressed
Clonazepam	Clonazepam	13	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	13	suppressed
Digoxin	Digoxin	13	suppressed
Doxycycline Monohydrate	Doxycycline Monohydrate	13	13
Guanfacine Hcl Er	Guanfacine Hcl	13	suppressed
Sildenafil Citrate	Sildenafil Citrate	13	suppressed
Lorazepam	Lorazepam	12	suppressed
Nitroglycerin	Nitroglycerin	12	suppressed
Ramelteon	Ramelteon	12	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	12	suppressed
Tresiba Flextouch U-200	Insulin Degludec	12	suppressed
Cephalexin	Cephalexin	11	suppressed
Clindamycin Hcl	Clindamycin Hcl	11	suppressed
Donepezil Hcl	Donepezil Hcl	11	suppressed
Enoxaparin Sodium	Enoxaparin Sodium	11	suppressed
Fosinopril Sodium	Fosinopril Sodium	11	suppressed
Leucovorin Calcium	Leucovorin Calcium	11	suppressed
Methylprednisolone	Methylprednisolone	11	suppressed
Metoclopramide Hcl	Metoclopramide Hcl	11	suppressed
Premarin	Estrogens, Conjugated	11	suppressed
Propranolol Hcl	Propranolol Hcl	11	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	11	suppressed
Valacyclovir	Valacyclovir 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