Healthcare provider profile · identity verified

Spencer W Fast, MD

Family Practice · REEDSBURG, WI · NPI 1306990429

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	839	214
Lisinopril	Lisinopril	449	128
Amlodipine Besylate	Amlodipine Besylate	418	107
Levothyroxine Sodium	Levothyroxine Sodium	396	79
Metoprolol Succinate	Metoprolol Succinate	383	90
Rosuvastatin Calcium	Rosuvastatin Calcium	373	111
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	321	46
Omeprazole	Omeprazole	315	77
Furosemide	Furosemide	313	78
Tamsulosin Hcl	Tamsulosin Hcl	296	73
Potassium Chloride	Potassium Chloride	289	68
Pantoprazole Sodium	Pantoprazole Sodium	270	68
Gabapentin	Gabapentin	254	67
Losartan Potassium	Losartan Potassium	225	59
Carvedilol	Carvedilol	204	48
Xarelto	Rivaroxaban	187	35
Eliquis	Apixaban	186	41
Finasteride	Finasteride	184	44
Escitalopram Oxalate	Escitalopram Oxalate	179	33
Hydrochlorothiazide	Hydrochlorothiazide	177	55
Metformin Hcl Er	Metformin Hcl	168	45
Irbesartan	Irbesartan	166	38
Allopurinol	Allopurinol	154	37
Albuterol Sulfate Hfa	Albuterol Sulfate	144	61
Spironolactone	Spironolactone	139	33
Trazodone Hcl	Trazodone Hcl	139	33
Duloxetine Hcl	Duloxetine Hcl	138	26
Famotidine	Famotidine	135	32
Fluticasone Propionate	Fluticasone Propionate	130	62
Farxiga	Dapagliflozin Propanediol	127	24
Metoprolol Tartrate	Metoprolol Tartrate	127	32
Tramadol Hcl	Tramadol Hcl	126	34
Warfarin Sodium	Warfarin Sodium	117	27
Oxycodone Hcl	Oxycodone Hcl	114	19
Metformin Hcl	Metformin Hcl	110	32
Clopidogrel	Clopidogrel Bisulfate	105	23
Jardiance	Empagliflozin	105	26
Clonazepam	Clonazepam	104	16
Trulicity	Dulaglutide	101	18
Prednisone	Prednisone	100	26
Alendronate Sodium	Alendronate Sodium	97	21
Ezetimibe	Ezetimibe	91	31
Glimepiride	Glimepiride	90	23
Celecoxib	Celecoxib	86	22
Sertraline Hcl	Sertraline Hcl	86	25
Tizanidine Hcl	Tizanidine Hcl	85	27
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	83	24
Bupropion Xl	Bupropion Hcl	81	16
Pregabalin	Pregabalin	81	20
Ropinirole Hcl	Ropinirole Hcl	78	11
Lorazepam	Lorazepam	77	18
Simvastatin	Simvastatin	75	20
Atenolol	Atenolol	73	22
Digoxin	Digoxin	73	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	73	22
Montelukast Sodium	Montelukast Sodium	73	15
Benazepril Hcl	Benazepril Hcl	68	18
Fentanyl	Fentanyl	67	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	64	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	63	26
Baclofen	Baclofen	58	12
Pioglitazone Hcl	Pioglitazone Hcl	58	15
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	57	13
Venlafaxine Hcl Er	Venlafaxine Hcl	57	suppressed
Meloxicam	Meloxicam	56	15
Enalapril Maleate	Enalapril Maleate	55	16
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	54	12
Doxazosin Mesylate	Doxazosin Mesylate	54	14
Nitroglycerin	Nitroglycerin	54	33
Mounjaro	Tirzepatide	52	suppressed
Bumetanide	Bumetanide	51	suppressed
Citalopram Hbr	Citalopram Hydrobromide	51	13
Morphine Sulfate Er	Morphine Sulfate	50	suppressed
Breo Ellipta	Fluticasone/Vilanterol	49	15
Amitriptyline Hcl	Amitriptyline Hcl	48	14
Hydralazine Hcl	Hydralazine Hcl	48	suppressed
Morphine Sulfate	Morphine Sulfate	48	11
Buspirone Hcl	Buspirone Hcl	47	suppressed
Diclofenac Sodium	Diclofenac Sodium	46	23
Primidone	Primidone	45	suppressed
Donepezil Hcl	Donepezil Hcl	44	11
Myrbetriq	Mirabegron	44	13
Tradjenta	Linagliptin	43	suppressed
Lansoprazole	Lansoprazole	42	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	42	suppressed
Alprazolam	Alprazolam	41	13
Terazosin Hcl	Terazosin Hcl	41	suppressed
Torsemide	Torsemide	40	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	38	suppressed
Cilostazol	Cilostazol	37	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	37	suppressed
Ondansetron Odt	Ondansetron	36	suppressed
Levetiracetam	Levetiracetam	35	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	35	11
Valsartan	Valsartan	35	11
Chlorthalidone	Chlorthalidone	34	suppressed
Humalog Kwikpen U-100	Insulin Lispro	34	suppressed
Nystatin	Nystatin	34	14
Oxycontin	Oxycodone Hcl	34	suppressed
Lidocaine	Lidocaine	33	11
Mirtazapine	Mirtazapine	33	suppressed
Paroxetine Hcl	Paroxetine Hcl	33	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	32	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	31	11
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	30	11
Ozempic	Semaglutide	30	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	30	suppressed
Methylphenidate Hcl	Methylphenidate Hcl	29	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	29	suppressed
Tresiba Flextouch U-200	Insulin Degludec	29	suppressed
Ventolin Hfa	Albuterol Sulfate	29	suppressed
Aripiprazole	Aripiprazole	28	suppressed
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	28	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	28	suppressed
Pravastatin Sodium	Pravastatin Sodium	28	suppressed
Novolog Flexpen	Insulin Aspart	27	suppressed
Acyclovir	Acyclovir	26	suppressed
Bupropion Hcl Sr	Bupropion Hcl	26	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	26	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	25	suppressed
Ipratropium Bromide	Ipratropium Bromide	25	suppressed
Memantine Hcl	Memantine Hcl	25	suppressed
Solifenacin Succinate	Solifenacin Succinate	25	suppressed
Spiriva Handihaler	Tiotropium Bromide	25	suppressed
Fenofibrate	Fenofibrate	24	suppressed
Folic Acid	Folic Acid	24	suppressed
Lamotrigine	Lamotrigine	24	suppressed
Nifedipine Er	Nifedipine	24	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	23	suppressed
Temazepam	Temazepam	23	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	21	suppressed
Cephalexin	Cephalexin	21	suppressed
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	21	suppressed
Sucralfate	Sucralfate	21	suppressed
Tresiba Flextouch U-100	Insulin Degludec	21	suppressed
Fluconazole	Fluconazole	20	suppressed
Glipizide	Glipizide	20	suppressed
Januvia	Sitagliptin Phosphate	20	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	20	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	20	suppressed
Repatha Syringe	Evolocumab	20	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	20	suppressed
Alfuzosin Hcl Er	Alfuzosin Hcl	18	suppressed
Synthroid	Levothyroxine Sodium	18	suppressed
Rybelsus	Semaglutide	17	suppressed
Dulera	Mometasone/Formoterol	16	suppressed
Lovastatin	Lovastatin	16	suppressed
Clonidine Hcl	Clonidine Hcl	15	suppressed
Doxycycline Monohydrate	Doxycycline Monohydrate	15	suppressed
Entresto	Sacubitril/Valsartan	15	suppressed
Incruse Ellipta	Umeclidinium Bromide	15	suppressed
Invokana	Canagliflozin	15	suppressed
Ondansetron Hcl	Ondansetron Hcl	15	suppressed
Spiriva Respimat	Tiotropium Bromide	15	suppressed
Azelastine Hcl	Azelastine Hcl	14	suppressed
Propranolol Hcl	Propranolol Hcl	14	suppressed
Lidocaine Hcl Viscous	Lidocaine Hcl	13	suppressed
Meclizine Hcl	Meclizine Hcl	13	suppressed
Arnuity Ellipta	Fluticasone Furoate	12	suppressed
Bydureon Bcise	Exenatide Microspheres	12	suppressed
Nurtec Odt	Rimegepant Sulfate	12	suppressed
Rivastigmine	Rivastigmine	12	suppressed
Savella	Milnacipran Hcl	12	suppressed
Tramadol Hcl Er	Tramadol Hcl	12	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	11	suppressed
Colchicine	Colchicine	11	suppressed
Epinephrine	Epinephrine	11	suppressed
Glipizide Er	Glipizide	11	suppressed
Ketoconazole	Ketoconazole	11	suppressed
Risperidone	Risperidone	11	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	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