Healthcare provider profile · identity verified

Mark S. Skier, M.D.

Internal Medicine · BAYVIEW, WI · NPI 1346234812

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	753	207
Amlodipine Besylate	Amlodipine Besylate	566	151
Losartan Potassium	Losartan Potassium	553	145
Metoprolol Succinate	Metoprolol Succinate	401	110
Levothyroxine Sodium	Levothyroxine Sodium	369	100
Lisinopril	Lisinopril	322	83
Rosuvastatin Calcium	Rosuvastatin Calcium	278	71
Metformin Hcl Er	Metformin Hcl	265	67
Hydrochlorothiazide	Hydrochlorothiazide	220	62
Omeprazole	Omeprazole	212	63
Pantoprazole Sodium	Pantoprazole Sodium	204	54
Albuterol Sulfate Hfa	Albuterol Sulfate	199	64
Gabapentin	Gabapentin	178	56
Furosemide	Furosemide	168	47
Eliquis	Apixaban	167	34
Metformin Hcl	Metformin Hcl	156	43
Simvastatin	Simvastatin	150	40
Tamsulosin Hcl	Tamsulosin Hcl	137	40
Escitalopram Oxalate	Escitalopram Oxalate	129	29
Glimepiride	Glimepiride	118	31
Valsartan	Valsartan	118	34
Tramadol Hcl	Tramadol Hcl	117	20
Potassium Chloride	Potassium Chloride	107	35
Metoprolol Tartrate	Metoprolol Tartrate	104	29
Sertraline Hcl	Sertraline Hcl	103	32
Allopurinol	Allopurinol	96	29
Pravastatin Sodium	Pravastatin Sodium	94	28
Pregabalin	Pregabalin	89	14
Trazodone Hcl	Trazodone Hcl	88	18
Clopidogrel	Clopidogrel Bisulfate	87	25
Meloxicam	Meloxicam	85	23
Jardiance	Empagliflozin	78	20
Spironolactone	Spironolactone	71	18
Ozempic	Semaglutide	68	13
Famotidine	Famotidine	67	17
Finasteride	Finasteride	67	21
Alendronate Sodium	Alendronate Sodium	63	14
Montelukast Sodium	Montelukast Sodium	61	17
Memantine Hcl	Memantine Hcl	58	suppressed
Hydralazine Hcl	Hydralazine Hcl	57	11
Fenofibrate	Fenofibrate Nanocrystallized	55	15
Fenofibrate	Fenofibrate	54	16
Tizanidine Hcl	Tizanidine Hcl	54	22
Ezetimibe	Ezetimibe	53	14
Clonazepam	Clonazepam	52	suppressed
Atenolol	Atenolol	51	15
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	51	14
Synthroid	Levothyroxine Sodium	51	14
Citalopram Hbr	Citalopram Hydrobromide	50	11
Fluticasone Propionate	Fluticasone Propionate	50	22
Mirtazapine	Mirtazapine	48	11
Venlafaxine Hcl Er	Venlafaxine Hcl	48	13
Januvia	Sitagliptin Phosphate	47	12
Azithromycin	Azithromycin	45	39
Carvedilol	Carvedilol	45	13
Glipizide Er	Glipizide	45	14
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	45	13
Zolpidem Tartrate	Zolpidem Tartrate	44	suppressed
Chlorthalidone	Chlorthalidone	42	13
Duloxetine Hcl	Duloxetine Hcl	42	12
Symbicort	Budesonide/Formoterol Fumarate	41	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	39	suppressed
Bupropion Hcl Sr	Bupropion Hcl	39	suppressed
Warfarin Sodium	Warfarin Sodium	39	13
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	38	16
Estradiol	Estradiol	37	suppressed
Lovastatin	Lovastatin	36	suppressed
Paroxetine Hcl	Paroxetine Hcl	35	suppressed
Repaglinide	Repaglinide	34	suppressed
Klor-Con M20	Potassium Chloride	31	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	31	suppressed
Propranolol Hcl Er	Propranolol Hcl	31	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	30	suppressed
Omega-3 Acid Ethyl Esters	Omega-3 Acid Ethyl Esters	30	suppressed
Alprazolam	Alprazolam	29	13
Meclizine Hcl	Meclizine Hcl	28	suppressed
Buspirone Hcl	Buspirone Hcl	27	suppressed
Ipratropium Bromide	Ipratropium Bromide	27	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	27	suppressed
Nystatin	Nystatin	27	12
Fluoxetine Hcl	Fluoxetine Hcl	26	suppressed
Irbesartan	Irbesartan	26	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	25	suppressed
Trulicity	Dulaglutide	25	suppressed
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	25	suppressed
Digoxin	Digoxin	24	suppressed
Bumetanide	Bumetanide	23	suppressed
Rizatriptan	Rizatriptan Benzoate	23	suppressed
Tradjenta	Linagliptin	23	suppressed
Arnuity Ellipta	Fluticasone Furoate	22	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	22	suppressed
Mounjaro	Tirzepatide	22	suppressed
Myrbetriq	Mirabegron	22	suppressed
Baclofen	Baclofen	21	suppressed
Cephalexin	Cephalexin	21	19
Diazepam	Diazepam	21	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	21	suppressed
Lidocaine	Lidocaine	21	suppressed
Lorazepam	Lorazepam	21	11
Propranolol Hcl	Propranolol Hcl	21	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	20	suppressed
Colchicine	Colchicine	20	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	20	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	20	suppressed
Prednisone	Prednisone	20	17
Triamcinolone Acetonide	Triamcinolone Acetonide	20	suppressed
Amoxicillin	Amoxicillin	19	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	19	14
Ventolin Hfa	Albuterol Sulfate	19	suppressed
Etodolac	Etodolac	18	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	18	suppressed
Nebivolol Hcl	Nebivolol Hcl	18	suppressed
Trospium Chloride	Trospium Chloride	18	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	17	suppressed
Anastrozole	Anastrozole	17	suppressed
Fenofibrate	Fenofibrate,micronized	17	suppressed
Gemfibrozil	Gemfibrozil	17	suppressed
Glipizide	Glipizide	17	suppressed
Torsemide	Torsemide	17	suppressed
Entresto	Sacubitril/Valsartan	16	suppressed
Eplerenone	Eplerenone	16	suppressed
Linzess	Linaclotide	16	suppressed
Telmisartan	Telmisartan	16	suppressed
Ammonium Lactate	Ammonium Lactate	15	suppressed
Bupropion Xl	Bupropion Hcl	15	suppressed
Diclofenac Sodium	Diclofenac Sodium	15	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	15	suppressed
Ramipril	Ramipril	15	suppressed
Benazepril Hcl	Benazepril Hcl	14	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	14	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	14	14
Repatha Sureclick	Evolocumab	14	suppressed
Benicar	Olmesartan Medoxomil	13	suppressed
Bisoprolol-Hydrochlorothiazide	Bisoprolol/Hydrochlorothiazide	13	suppressed
Fluconazole	Fluconazole	13	12
Insulin Syringe	Syringe-Needle,insulin,0.5 Ml	13	suppressed
Methimazole	Methimazole	13	suppressed
Naproxen	Naproxen	13	suppressed
Nitroglycerin	Nitroglycerin	13	suppressed
Solifenacin Succinate	Solifenacin Succinate	13	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	13	suppressed
Amiodarone Hcl	Amiodarone Hcl	12	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	12	suppressed
Bystolic	Nebivolol Hcl	12	suppressed
Celecoxib	Celecoxib	12	suppressed
Diltiazem 24hr Er	Diltiazem Hcl	12	suppressed
Hydromorphone Hcl	Hydromorphone Hcl	12	suppressed
Ibuprofen	Ibuprofen	12	suppressed
Levetiracetam	Levetiracetam	12	suppressed
Nifedipine Er	Nifedipine	12	suppressed
Prochlorperazine Maleate	Prochlorperazine Maleate	12	suppressed
Verapamil Sr	Verapamil Hcl	12	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	11	suppressed
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	11	suppressed
Ezetimibe-Simvastatin	Ezetimibe/Simvastatin	11	suppressed
Folic Acid	Folic Acid	11	suppressed
Toujeo Solostar	Insulin Glargine,hum.Rec.Anlog	11	suppressed
Ultra-Fine Short Pen Needle	Pen Needle, Diabetic	11	suppressed
Varenicline Tartrate	Varenicline Tartrate	11	suppressed
Xarelto	Rivaroxaban	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