Healthcare provider profile · identity verified

Gary William Lambert, DO

Family Practice · MUSKOGEE, OK · NPI 1619068715

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	1430	272
Levothyroxine Sodium	Levothyroxine Sodium	1350	199
Furosemide	Furosemide	875	147
Potassium Chloride	Potassium Chloride	789	139
Gabapentin	Gabapentin	783	128
Amlodipine Besylate	Amlodipine Besylate	758	135
Eliquis	Apixaban	744	80
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	715	129
Pantoprazole Sodium	Pantoprazole Sodium	566	116
Omeprazole	Omeprazole	561	114
Lisinopril	Lisinopril	524	108
Metoprolol Tartrate	Metoprolol Tartrate	511	103
Trazodone Hcl	Trazodone Hcl	488	100
Metoprolol Succinate	Metoprolol Succinate	428	113
Metformin Hcl	Metformin Hcl	418	83
Carvedilol	Carvedilol	416	72
Clopidogrel	Clopidogrel Bisulfate	408	93
Rosuvastatin Calcium	Rosuvastatin Calcium	401	97
Losartan Potassium	Losartan Potassium	383	104
Tamsulosin Hcl	Tamsulosin Hcl	381	65
Ropinirole Hcl	Ropinirole Hcl	373	53
Donepezil Hcl	Donepezil Hcl	337	55
Escitalopram Oxalate	Escitalopram Oxalate	335	46
Buspirone Hcl	Buspirone Hcl	332	59
Azithromycin	Azithromycin	287	203
Montelukast Sodium	Montelukast Sodium	277	48
Mirtazapine	Mirtazapine	273	43
Jardiance	Empagliflozin	269	48
Famotidine	Famotidine	261	49
Levetiracetam	Levetiracetam	238	36
Sertraline Hcl	Sertraline Hcl	229	47
Ozempic	Semaglutide	225	47
Xarelto	Rivaroxaban	219	35
Divalproex Sodium	Divalproex Sodium	217	31
Duloxetine Hcl	Duloxetine Hcl	213	32
Meloxicam	Meloxicam	213	45
Allopurinol	Allopurinol	205	46
Farxiga	Dapagliflozin Propanediol	199	50
Hydralazine Hcl	Hydralazine Hcl	197	36
Memantine Hcl	Memantine Hcl	195	31
Finasteride	Finasteride	189	33
Pravastatin Sodium	Pravastatin Sodium	183	39
Celecoxib	Celecoxib	178	37
Entresto	Sacubitril/Valsartan	177	27
Baclofen	Baclofen	173	23
Januvia	Sitagliptin Phosphate	171	17
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	167	42
Atenolol	Atenolol	161	39
Albuterol Sulfate Hfa	Albuterol Sulfate	158	52
Irbesartan	Irbesartan	153	45
Lorazepam	Lorazepam	153	26
Hydrochlorothiazide	Hydrochlorothiazide	146	41
Citalopram Hbr	Citalopram Hydrobromide	144	29
Simvastatin	Simvastatin	137	24
Tramadol Hcl	Tramadol Hcl	137	38
Ciprofloxacin Hcl	Ciprofloxacin Hcl	130	100
Fluoxetine Hcl	Fluoxetine Hcl	127	22
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	126	35
Ezetimibe	Ezetimibe	126	20
Terazosin Hcl	Terazosin Hcl	123	33
Oxybutynin Chloride	Oxybutynin Chloride	121	18
Amiodarone Hcl	Amiodarone Hcl	120	19
Levofloxacin	Levofloxacin	117	94
Zolpidem Tartrate	Zolpidem Tartrate	117	15
Pioglitazone Hcl	Pioglitazone Hcl	113	29
Gemtesa	Vibegron	111	suppressed
Sucralfate	Sucralfate	110	18
Valsartan	Valsartan	107	25
Torsemide	Torsemide	105	20
Pregabalin	Pregabalin	103	22
Quetiapine Fumarate	Quetiapine Fumarate	103	19
Ondansetron Hcl	Ondansetron Hcl	102	61
Mounjaro	Tirzepatide	101	22
Diclofenac Sodium	Diclofenac Sodium	100	32
Oxycodone Hcl	Oxycodone Hcl	100	15
Alprazolam	Alprazolam	99	19
Tizanidine Hcl	Tizanidine Hcl	99	20
Carbidopa-Levodopa	Carbidopa/Levodopa	97	suppressed
Methylprednisolone	Methylprednisolone	93	81
Ondansetron Odt	Ondansetron	93	43
Fluticasone Propionate	Fluticasone Propionate	92	41
Glipizide	Glipizide	92	18
Calcitonin-Salmon	Calcitonin,salmon,synthetic	90	24
Lantus	Insulin Glargine,hum.Rec.Anlog	90	27
Triamcinolone Acetonide	Triamcinolone Acetonide	90	35
Alendronate Sodium	Alendronate Sodium	85	29
Fluconazole	Fluconazole	84	60
Isosorbide Mononitrate Er	Isosorbide Mononitrate	84	13
Doxazosin Mesylate	Doxazosin Mesylate	83	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	82	18
Warfarin Sodium	Warfarin Sodium	82	23
Calcitriol	Calcitriol	81	12
Prednisone	Prednisone	81	31
Myrbetriq	Mirabegron	79	suppressed
Estradiol	Estradiol	78	13
Spironolactone	Spironolactone	78	26
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	77	18
Bupropion Hcl Sr	Bupropion Hcl	75	14
Clonidine Hcl	Clonidine Hcl	75	32
Novolog	Insulin Aspart	73	23
Doxycycline Hyclate	Doxycycline Hyclate	71	50
Risperidone	Risperidone	71	13
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	69	52
Acetaminophen-Codeine	Acetaminophen With Codeine	68	30
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	67	19
Hydroxyzine Hcl	Hydroxyzine Hcl	61	22
Breo Ellipta	Fluticasone/Vilanterol	60	11
Ibuprofen	Ibuprofen	60	18
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	59	12
Symbicort	Budesonide/Formoterol Fumarate	59	14
Rivastigmine	Rivastigmine Tartrate	58	suppressed
Humalog Kwikpen U-100	Insulin Lispro	57	14
Oxybutynin Chloride Er	Oxybutynin Chloride	57	11
Movantik	Naloxegol Oxalate	55	suppressed
Testosterone Cypionate	Testosterone Cypionate	55	14
Bupropion Xl	Bupropion Hcl	54	suppressed
Meclizine Hcl	Meclizine Hcl	54	18
Lactulose	Lactulose	53	20
Labetalol Hcl	Labetalol Hcl	52	suppressed
Trulicity	Dulaglutide	52	suppressed
Pentoxifylline	Pentoxifylline	51	suppressed
Namzaric	Memantine Hcl/Donepezil Hcl	50	suppressed
Enalapril Maleate	Enalapril Maleate	49	14
Methocarbamol	Methocarbamol	49	16
Anastrozole	Anastrozole	48	11
Cephalexin	Cephalexin	48	42
Raloxifene Hcl	Raloxifene Hcl	47	suppressed
Nifedipine Er	Nifedipine	45	suppressed
Albuterol Sulfate	Albuterol Sulfate	44	29
Creon	Lipase/Protease/Amylase	44	suppressed
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	44	25
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	44	33
Clindamycin Hcl	Clindamycin Hcl	42	34
Glimepiride	Glimepiride	42	suppressed
Ranolazine Er	Ranolazine	42	suppressed
Toujeo Solostar	Insulin Glargine,hum.Rec.Anlog	42	suppressed
Diltiazem Hcl	Diltiazem Hcl	41	suppressed
Olanzapine	Olanzapine	41	11
Synthroid	Levothyroxine Sodium	40	suppressed
Fiasp Flextouch	Insulin Aspart (Niacinamide)	37	suppressed
Lubiprostone	Lubiprostone	37	suppressed
Nystatin	Nystatin	37	26
Permethrin	Permethrin	37	15
Humalog	Insulin Lispro	36	12
Irbesartan-Hydrochlorothiazide	Irbesartan/Hydrochlorothiazide	36	suppressed
Novolog Flexpen	Insulin Aspart	36	20
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	35	13
Latanoprost	Latanoprost	35	suppressed
Nitroglycerin	Nitroglycerin	35	28
Temazepam	Temazepam	35	suppressed
Doxepin Hcl	Doxepin Hcl	34	suppressed
Metronidazole	Metronidazole	34	28
Esomeprazole Magnesium	Esomeprazole Magnesium	33	suppressed
Spiriva Respimat	Tiotropium Bromide	33	suppressed
Benazepril Hcl	Benazepril Hcl	31	suppressed
Brilinta	Ticagrelor	31	suppressed
Lacosamide	Lacosamide	31	suppressed
Ursodiol	Ursodiol	31	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	30	suppressed
Diazepam	Diazepam	30	14
Donepezil Hcl Odt	Donepezil Hcl	30	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	30	suppressed
Insulin Aspart Flexpen	Insulin Aspart	30	17
Bisoprolol Fumarate	Bisoprolol Fumarate	29	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	28	suppressed
Folic Acid	Folic Acid	28	suppressed
Midodrine Hcl	Midodrine Hcl	28	suppressed
Mometasone Furoate	Mometasone Furoate	28	13
Sulfasalazine	Sulfasalazine	28	suppressed
Clonazepam	Clonazepam	26	suppressed
Gentamicin Sulfate	Gentamicin Sulfate	26	22
Methimazole	Methimazole	26	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	26	suppressed
Ceftriaxone	Ceftriaxone Sodium	25	23
Metformin Hcl Er	Metformin Hcl	25	suppressed
Valacyclovir	Valacyclovir Hcl	25	suppressed
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	24	15
Linzess	Linaclotide	24	11
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	24	13
Vraylar	Cariprazine Hcl	24	suppressed
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	23	suppressed
Carbamazepine	Carbamazepine	23	suppressed
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	23	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	23	suppressed
Megestrol Acetate	Megestrol Acetate	23	15
Bethanechol Chloride	Bethanechol Chloride	22	suppressed
Breztri Aerosphere	Budesonide/Glycopyr/Formoterol	22	suppressed
Lagevrio (Eua)	Molnupiravir	22	22
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	22	suppressed
Kerendia	Finerenone	21	suppressed
Methotrexate	Methotrexate Sodium	21	suppressed
Mupirocin	Mupirocin	21	16
Propranolol Hcl	Propranolol Hcl	21	suppressed
Ventolin Hfa	Albuterol Sulfate	21	suppressed
Naproxen	Naproxen	20	suppressed
Scopolamine	Scopolamine	20	suppressed
Silver Sulfadiazine	Silver Sulfadiazine	20	suppressed
Thioridazine Hcl	Thioridazine Hcl	20	suppressed
Azathioprine	Azathioprine	19	suppressed
Brimonidine Tartrate	Brimonidine Tartrate	19	suppressed
Colestipol Hcl	Colestipol Hcl	19	suppressed
Lovastatin	Lovastatin	19	suppressed
Novolin N	Insulin Nph Human Isophane	19	suppressed
Omega-3 Acid Ethyl Esters	Omega-3 Acid Ethyl Esters	19	suppressed
Verapamil Er	Verapamil Hcl	19	suppressed
Nebivolol Hcl	Nebivolol Hcl	18	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	18	suppressed
Zafirlukast	Zafirlukast	18	suppressed
Clotrimazole	Clotrimazole	17	11
Enulose	Lactulose	17	12
Lurasidone Hcl	Lurasidone Hcl	17	suppressed
Paroxetine Hcl	Paroxetine Hcl	17	suppressed
Testosterone	Testosterone	17	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	16	suppressed
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	16	suppressed
Fiasp	Insulin Aspart (Niacinamide)	16	suppressed
Metoclopramide Hcl	Metoclopramide Hcl	16	suppressed
Nystatin-Triamcinolone	Nystatin/Triamcinolone Acet	16	11
Topiramate	Topiramate	16	suppressed
Ziprasidone Hcl	Ziprasidone Hcl	16	suppressed
Alphagan P	Brimonidine Tartrate	15	suppressed
Aripiprazole	Aripiprazole	15	suppressed
Fenofibrate	Fenofibrate	15	suppressed
Ketoconazole	Ketoconazole	15	suppressed
Nystop	Nystatin	15	suppressed
Riluzole	Riluzole	15	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	15	suppressed
Varenicline Tartrate	Varenicline Tartrate	15	suppressed
Acetic Acid	Acetic Acid	14	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	14	suppressed
Fosinopril Sodium	Fosinopril Sodium	14	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	14	14
Acyclovir	Acyclovir	13	suppressed
Budesonide-Formoterol Fumarate	Budesonide/Formoterol Fumarate	13	suppressed
Bumetanide	Bumetanide	13	suppressed
Carbamazepine Er	Carbamazepine	13	suppressed
Chlordiazepoxide Hcl	Chlordiazepoxide Hcl	13	suppressed
Ethambutol Hcl	Ethambutol Hcl	13	suppressed
Hydroxyurea	Hydroxyurea	13	suppressed
Lamotrigine	Lamotrigine	13	suppressed
Novolin N Flexpen	Insulin Nph Human Isophane	13	suppressed
Prazosin Hcl	Prazosin Hcl	13	suppressed
Valproic Acid	Valproic Acid (As Sodium Salt)	13	suppressed
Advair Diskus	Fluticasone Propion/Salmeterol	12	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	12	suppressed
Amoxicillin	Amoxicillin	12	12
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	12	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	12	suppressed
Levemir Flexpen	Insulin Detemir	12	suppressed
Lidocaine Hcl	Lidocaine Hcl/Pf	12	suppressed
Medroxyprogesterone Acetate	Medroxyprogesterone Acetate	12	suppressed
Nuplazid	Pimavanserin Tartrate	12	suppressed
Sevelamer Carbonate	Sevelamer Carbonate	12	suppressed
Soliqua 100-33	Insulin Glargine/Lixisenatide	12	suppressed
Ultra-Fine Short Pen Needle	Pen Needle, Diabetic	12	suppressed
Benztropine Mesylate	Benztropine Mesylate	11	suppressed
Cefuroxime	Cefuroxime Axetil	11	11
Cholestyramine Light	Cholestyramine	11	suppressed
Etodolac	Etodolac	11	suppressed
Glipizide Er	Glipizide	11	suppressed
Metolazone	Metolazone	11	suppressed
Ramipril	Ramipril	11	suppressed
Solifenacin Succinate	Solifenacin Succinate	11	suppressed
Ssd	Silver Sulfadiazine	11	suppressed
Tresiba Flextouch U-100	Insulin Degludec	11	suppressed
Tresiba Flextouch U-200	Insulin Degludec	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