Healthcare provider profile · identity verified

Charles Frederic Whitaker, M.D.

Family Practice · COLDWATER, MI · NPI 1821054966

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	1828	412
Levothyroxine Sodium	Levothyroxine Sodium	1420	268
Eliquis	Apixaban	987	145
Amlodipine Besylate	Amlodipine Besylate	872	218
Furosemide	Furosemide	861	190
Lisinopril	Lisinopril	815	196
Gabapentin	Gabapentin	748	148
Potassium Chloride	Potassium Chloride	744	153
Tamsulosin Hcl	Tamsulosin Hcl	701	153
Omeprazole	Omeprazole	686	179
Metformin Hcl	Metformin Hcl	559	132
Metoprolol Succinate	Metoprolol Succinate	549	137
Escitalopram Oxalate	Escitalopram Oxalate	538	103
Metoprolol Tartrate	Metoprolol Tartrate	537	128
Hydrochlorothiazide	Hydrochlorothiazide	534	127
Pantoprazole Sodium	Pantoprazole Sodium	494	130
Losartan Potassium	Losartan Potassium	493	120
Sertraline Hcl	Sertraline Hcl	464	110
Trazodone Hcl	Trazodone Hcl	454	114
Clopidogrel	Clopidogrel Bisulfate	451	103
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	443	75
Duloxetine Hcl	Duloxetine Hcl	406	80
Tramadol Hcl	Tramadol Hcl	402	68
Jardiance	Empagliflozin	396	51
Xarelto	Rivaroxaban	389	50
Bumetanide	Bumetanide	369	80
Donepezil Hcl	Donepezil Hcl	364	75
Buspirone Hcl	Buspirone Hcl	353	71
Carvedilol	Carvedilol	345	80
Prednisone	Prednisone	282	131
Famotidine	Famotidine	269	65
Cephalexin	Cephalexin	266	111
Quetiapine Fumarate	Quetiapine Fumarate	262	69
Levetiracetam	Levetiracetam	261	44
Mirtazapine	Mirtazapine	256	48
Hydralazine Hcl	Hydralazine Hcl	254	62
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	251	56
Divalproex Sodium	Divalproex Sodium	249	54
Meloxicam	Meloxicam	248	65
Olanzapine	Olanzapine	234	47
Glipizide	Glipizide	231	53
Albuterol Sulfate Hfa	Albuterol Sulfate	218	97
Myrbetriq	Mirabegron	218	20
Lorazepam	Lorazepam	216	60
Baclofen	Baclofen	213	42
Allopurinol	Allopurinol	211	46
Memantine Hcl	Memantine Hcl	211	41
Fluoxetine Hcl	Fluoxetine Hcl	200	48
Aripiprazole	Aripiprazole	189	34
Venlafaxine Hcl Er	Venlafaxine Hcl	185	25
Spironolactone	Spironolactone	184	52
Finasteride	Finasteride	177	38
Ondansetron Hcl	Ondansetron Hcl	176	67
Fluticasone Propionate	Fluticasone Propionate	170	57
Risperidone	Risperidone	170	36
Pravastatin Sodium	Pravastatin Sodium	169	35
Simvastatin	Simvastatin	168	38
Citalopram Hbr	Citalopram Hydrobromide	164	41
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	148	44
Diclofenac Sodium	Diclofenac Sodium	138	47
Pregabalin	Pregabalin	138	19
Tizanidine Hcl	Tizanidine Hcl	138	33
Isosorbide Mononitrate Er	Isosorbide Mononitrate	136	33
Topiramate	Topiramate	132	23
Hydroxyzine Hcl	Hydroxyzine Hcl	130	51
Alprazolam	Alprazolam	127	29
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	127	39
Oxybutynin Chloride Er	Oxybutynin Chloride	122	29
Clonidine Hcl	Clonidine Hcl	121	35
Ibuprofen	Ibuprofen	120	39
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	120	52
Ropinirole Hcl	Ropinirole Hcl	120	28
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	116	32
Midodrine Hcl	Midodrine Hcl	115	28
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	113	74
Atenolol	Atenolol	112	27
Ozempic	Semaglutide	104	15
Amiodarone Hcl	Amiodarone Hcl	103	23
Montelukast Sodium	Montelukast Sodium	103	31
Carbidopa-Levodopa	Carbidopa/Levodopa	102	20
Bupropion Xl	Bupropion Hcl	101	22
Warfarin Sodium	Warfarin Sodium	98	17
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	95	27
Farxiga	Dapagliflozin Propanediol	93	13
Hydrocortisone	Hydrocortisone	92	18
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	91	37
Lantus	Insulin Glargine,hum.Rec.Anlog	87	16
Latanoprost	Latanoprost	84	23
Paroxetine Hcl	Paroxetine Hcl	82	19
Propranolol Hcl	Propranolol Hcl	81	18
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	80	11
Lactulose	Lactulose	80	11
Ondansetron Odt	Ondansetron	79	38
Oxybutynin Chloride	Oxybutynin Chloride	79	21
Torsemide	Torsemide	79	24
Breo Ellipta	Fluticasone/Vilanterol	78	16
Zolpidem Tartrate	Zolpidem Tartrate	78	15
Digoxin	Digoxin	77	21
Ezetimibe	Ezetimibe	77	18
Nystatin	Nystatin	77	32
Metolazone	Metolazone	76	17
Sodium Chloride	0.9 % Sodium Chloride	74	11
Clonazepam	Clonazepam	72	11
Metformin Hcl Er	Metformin Hcl	71	12
Oxycodone Hcl	Oxycodone Hcl	71	13
Primidone	Primidone	70	suppressed
Morphine Sulfate Er	Morphine Sulfate	69	11
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	67	46
Methocarbamol	Methocarbamol	66	23
Meclizine Hcl	Meclizine Hcl	64	19
Albuterol Sulfate	Albuterol Sulfate	63	23
Clindamycin Hcl	Clindamycin Hcl	63	32
Fluconazole	Fluconazole	62	32
Methenamine Hippurate	Methenamine Hippurate	62	14
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	62	suppressed
Fentanyl	Fentanyl	61	16
Rosuvastatin Calcium	Rosuvastatin Calcium	61	23
Azithromycin	Azithromycin	59	43
Alendronate Sodium	Alendronate Sodium	56	16
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	56	suppressed
Entresto	Sacubitril/Valsartan	55	15
Metoclopramide Hcl	Metoclopramide Hcl	55	17
Ketoconazole	Ketoconazole	54	19
Lovastatin	Lovastatin	54	17
Pioglitazone Hcl	Pioglitazone Hcl	54	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	53	19
Loperamide	Loperamide Hcl	52	19
Fenofibrate	Fenofibrate Nanocrystallized	51	suppressed
Nitroglycerin	Nitroglycerin	51	37
Amoxicillin	Amoxicillin	50	26
Divalproex Sodium Er	Divalproex Sodium	50	suppressed
Lacosamide	Lacosamide	50	suppressed
Lamotrigine	Lamotrigine	50	14
Dutasteride	Dutasteride	49	suppressed
Ventolin Hfa	Albuterol Sulfate	49	17
Methotrexate	Methotrexate Sodium	48	suppressed
Sucralfate	Sucralfate	48	14
Ciprofloxacin Hcl	Ciprofloxacin Hcl	47	30
Clonidine	Clonidine	46	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	45	22
Levofloxacin	Levofloxacin	44	24
Lurasidone Hcl	Lurasidone Hcl	44	suppressed
Sevelamer Carbonate	Sevelamer Carbonate	44	suppressed
Enalapril Maleate	Enalapril Maleate	43	14
Incruse Ellipta	Umeclidinium Bromide	43	11
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	43	suppressed
Scopolamine	Scopolamine	43	suppressed
Venlafaxine Hcl	Venlafaxine Hcl	42	14
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	41	21
Dicyclomine Hcl	Dicyclomine Hcl	41	15
Levemir Flexpen	Insulin Detemir	41	16
Enulose	Lactulose	40	suppressed
Vancomycin Hcl	Vancomycin Hcl	40	suppressed
Symbicort	Budesonide/Formoterol Fumarate	38	suppressed
Tradjenta	Linagliptin	38	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	36	suppressed
Nifedipine Er	Nifedipine	36	suppressed
Carbidopa-Levodopa Er	Carbidopa/Levodopa	35	suppressed
Celecoxib	Celecoxib	35	11
Chlorthalidone	Chlorthalidone	35	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	35	suppressed
Solifenacin Succinate	Solifenacin Succinate	35	suppressed
Trulicity	Dulaglutide	33	suppressed
Memantine Hcl Er	Memantine Hcl	32	suppressed
Phenobarbital	Phenobarbital	32	suppressed
Roflumilast	Roflumilast	32	suppressed
Verapamil Er	Verapamil Hcl	32	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	31	14
Ranolazine Er	Ranolazine	31	suppressed
Hydroxyzine Pamoate	Hydroxyzine Pamoate	30	suppressed
Timolol Maleate	Timolol Maleate	30	suppressed
Breyna	Budesonide/Formoterol Fumarate	29	15
Clobazam	Clobazam	29	suppressed
Desvenlafaxine Succinate Er	Desvenlafaxine Succinate	29	suppressed
Glipizide Er	Glipizide	29	suppressed
Santyl	Collagenase Clostridium Hist.	29	14
Dexamethasone	Dexamethasone	28	16
Movantik	Naloxegol Oxalate	28	suppressed
Cholestyramine Light	Cholestyramine	27	suppressed
Insulin Glargine	Insulin Glargine,hum.Rec.Anlog	27	suppressed
Tresiba Flextouch U-100	Insulin Degludec	27	suppressed
Benztropine Mesylate	Benztropine Mesylate	26	suppressed
Gemfibrozil	Gemfibrozil	26	suppressed
Linzess	Linaclotide	26	suppressed
Nuedexta	Dextromethorphan Hbr/Quinidine	26	suppressed
Abrysvo	Rsv Vacc, Pref A And Pref B/Pf	25	24
Rexulti	Brexpiprazole	25	suppressed
Carisoprodol	Carisoprodol	24	suppressed
Nystop	Nystatin	24	suppressed
Amantadine	Amantadine Hcl	23	suppressed
Chlorhexidine Gluconate	Chlorhexidine Gluconate	23	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	23	suppressed
Haloperidol	Haloperidol	23	12
Invokana	Canagliflozin	23	suppressed
Tamoxifen Citrate	Tamoxifen Citrate	23	suppressed
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	23	suppressed
Humalog Kwikpen U-100	Insulin Lispro	22	suppressed
Naproxen	Naproxen	22	suppressed
Oxcarbazepine	Oxcarbazepine	22	suppressed
Risperdal Consta	Risperidone Microspheres	22	suppressed
Terazosin Hcl	Terazosin Hcl	22	suppressed
Trospium Chloride	Trospium Chloride	22	suppressed
Bethanechol Chloride	Bethanechol Chloride	21	suppressed
Calcitonin-Salmon	Calcitonin,salmon,synthetic	21	suppressed
Clozapine	Clozapine	21	suppressed
Humalog	Insulin Lispro	21	suppressed
Novolog Flexpen	Insulin Aspart	21	suppressed
Promethazine Hcl	Promethazine Hcl	21	11
Bupropion Hcl	Bupropion Hcl	20	suppressed
Colchicine	Colchicine	20	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	20	suppressed
Metronidazole	Metronidazole/Sodium Chloride	20	suppressed
Mirabegron Er	Mirabegron	20	suppressed
Nyamyc	Nystatin	20	11
Tolterodine Tartrate Er	Tolterodine Tartrate	20	suppressed
Valacyclovir	Valacyclovir Hcl	20	suppressed
Vilazodone Hcl	Vilazodone Hcl	20	suppressed
Bupropion Hcl Sr	Bupropion Hcl	19	suppressed
Cefepime Hcl	Cefepime Hcl	19	suppressed
Diltiazem Hcl	Diltiazem Hcl	19	suppressed
Fludrocortisone Acetate	Fludrocortisone Acetate	19	suppressed
Ipratropium Bromide	Ipratropium Bromide	19	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	19	11
Oxycontin	Oxycodone Hcl	19	suppressed
Spiriva Handihaler	Tiotropium Bromide	19	suppressed
Verapamil Sr	Verapamil Hcl	19	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	19	suppressed
Xifaxan	Rifaximin	19	suppressed
Xtampza Er	Oxycodone Myristate	19	suppressed
Clotrimazole	Clotrimazole	18	suppressed
Haloperidol Decanoate	Haloperidol Decanoate	18	suppressed
Insulin Aspart Flexpen	Insulin Aspart	18	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	18	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	18	suppressed
Ammonium Lactate	Ammonium Lactate	17	suppressed
Calcium Acetate	Calcium Acetate	17	suppressed
Creon	Lipase/Protease/Amylase	17	suppressed
Metronidazole	Metronidazole	17	12
Omega-3 Acid Ethyl Esters	Omega-3 Acid Ethyl Esters	17	suppressed
Otezla	Apremilast	17	suppressed
Tacrolimus	Tacrolimus	17	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	16	14
Lokelma	Sodium Zirconium Cyclosilicate	16	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	16	suppressed
Quetiapine Fumarate Er	Quetiapine Fumarate	16	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	16	suppressed
Vancomycin Hcl	Vancomycin Hcl In 5 % Dextrose	16	suppressed
Velphoro	Sucroferric Oxyhydroxide	16	suppressed
Arexvy	Rsvpref3 Antigen/As01e/Pf	15	15
Cilostazol	Cilostazol	15	suppressed
Diltiazem 24hr Er	Diltiazem Hcl	15	suppressed
Fenofibrate	Fenofibrate	15	suppressed
Methimazole	Methimazole	15	suppressed
Minocycline Hcl	Minocycline Hcl	15	suppressed
Novolin R	Insulin Regular, Human	15	suppressed
Phenytoin	Phenytoin	15	suppressed
Prednisolone Acetate	Prednisolone Acetate	15	suppressed
Rivastigmine	Rivastigmine	15	suppressed
Testosterone Cypionate	Testosterone Cypionate	15	suppressed
Vraylar	Cariprazine Hcl	15	suppressed
Amiloride-Hydrochlorothiazide	Amiloride/Hydrochlorothiazide	14	suppressed
Atenolol-Chlorthalidone	Atenolol/Chlorthalidone	14	suppressed
Brimonidine Tartrate	Brimonidine Tartrate	14	suppressed
Budesonide-Formoterol Fumarate	Budesonide/Formoterol Fumarate	14	suppressed
Dantrolene Sodium	Dantrolene Sodium	14	suppressed
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	14	suppressed
Dulera	Mometasone/Formoterol	14	suppressed
Prazosin Hcl	Prazosin Hcl	14	suppressed
Spiriva Respimat	Tiotropium Bromide	14	suppressed
Trimethoprim	Trimethoprim	14	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	13	suppressed
Acitretin	Acitretin	13	suppressed
Alfuzosin Hcl Er	Alfuzosin Hcl	13	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	13	suppressed
Cefdinir	Cefdinir	13	12
Doxycycline Monohydrate	Doxycycline Monohydrate	13	suppressed
Felbamate	Felbamate	13	suppressed
Glimepiride	Glimepiride	13	suppressed
Insulin Aspart	Insulin Aspart	13	suppressed
Insulin Lispro	Insulin Lispro	13	12
Isosorbide Dinitrate	Isosorbide Dinitrate	13	suppressed
Meropenem	Meropenem	13	suppressed
Oxymorphone Hcl Er	Oxymorphone Hcl	13	suppressed
Rivastigmine	Rivastigmine Tartrate	13	suppressed
Tiotropium Bromide	Tiotropium Bromide	13	suppressed
Tramadol Hcl Er	Tramadol Hcl	13	suppressed
Acyclovir	Acyclovir	12	suppressed
Chlorpromazine Hcl	Chlorpromazine Hcl	12	suppressed
Clobetasol Propionate	Clobetasol Propionate	12	suppressed
Cyanocobalamin Injection	Cyanocobalamin (Vitamin B-12)	12	suppressed
Dapagliflozin	Dapagliflozin Propanediol	12	suppressed
Descovy	Emtricitabine/Tenofov Alafenam	12	suppressed
Flecainide Acetate	Flecainide Acetate	12	suppressed
Levemir	Insulin Detemir	12	suppressed
Nitrofurantoin	Nitrofurantoin Macrocrystal	12	suppressed
Oseltamivir Phosphate	Oseltamivir Phosphate	12	11
Rybelsus	Semaglutide	12	suppressed
Sildenafil Citrate	Sildenafil Citrate	12	suppressed
Toujeo Solostar	Insulin Glargine,hum.Rec.Anlog	12	suppressed
Tresiba	Insulin Degludec	12	suppressed
Valsartan	Valsartan	12	suppressed
Ziprasidone Hcl	Ziprasidone Hcl	12	suppressed
Cefepime	Cefepime In Iso-Osm Dextrose	11	suppressed
Ceftriaxone	Ceftriaxone Sodium	11	suppressed
Diltiazem 12hr Er	Diltiazem Hcl	11	suppressed
Galantamine Hbr	Galantamine Hbr	11	suppressed
Humulin R U-500	Insulin Regular, Human	11	suppressed
Insulin Glargine Solostar	Insulin Glargine,hum.Rec.Anlog	11	suppressed
Invega Sustenna	Paliperidone Palmitate	11	suppressed
Lidocaine-Prilocaine	Lidocaine/Prilocaine	11	suppressed
Megestrol Acetate	Megestrol Acetate	11	suppressed
Mounjaro	Tirzepatide	11	suppressed
Novolog	Insulin Aspart	11	suppressed
Penicillin V Potassium	Penicillin V Potassium	11	suppressed
Perphenazine	Perphenazine	11	suppressed
Secuado	Asenapine	11	suppressed
Simbrinza	Brinzolamide/Brimonidine Tart	11	suppressed
Sulfasalazine	Sulfasalazine	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