Healthcare provider profile · identity verified

Robert Mclain Williams, MD

Family Practice · OPP, AL · NPI 1801897269

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
Omeprazole	Omeprazole	421	107
Tramadol Hcl	Tramadol Hcl	384	69
Atorvastatin Calcium	Atorvastatin Calcium	360	92
Eliquis	Apixaban	334	46
Levothyroxine Sodium	Levothyroxine Sodium	312	47
Potassium Chloride	Potassium Chloride	291	66
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	257	62
Metoprolol Succinate	Metoprolol Succinate	245	60
Amlodipine Besylate	Amlodipine Besylate	243	56
Lisinopril	Lisinopril	240	58
Gabapentin	Gabapentin	232	42
Clonazepam	Clonazepam	225	36
Tamsulosin Hcl	Tamsulosin Hcl	220	51
Pantoprazole Sodium	Pantoprazole Sodium	216	56
Metformin Hcl	Metformin Hcl	206	46
Amitriptyline Hcl	Amitriptyline Hcl	203	41
Metoprolol Tartrate	Metoprolol Tartrate	201	41
Losartan Potassium	Losartan Potassium	198	43
Trazodone Hcl	Trazodone Hcl	183	42
Simvastatin	Simvastatin	176	47
Duloxetine Hcl	Duloxetine Hcl	171	33
Mirtazapine	Mirtazapine	159	29
Glimepiride	Glimepiride	154	28
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	149	30
Jardiance	Empagliflozin	128	18
Meloxicam	Meloxicam	128	30
Paroxetine Hcl	Paroxetine Hcl	125	26
Sertraline Hcl	Sertraline Hcl	123	25
Furosemide	Furosemide	117	28
Hydrochlorothiazide	Hydrochlorothiazide	116	26
Carvedilol	Carvedilol	115	21
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	105	35
Trulicity	Dulaglutide	104	17
Clopidogrel	Clopidogrel Bisulfate	102	23
Carbidopa-Levodopa	Carbidopa/Levodopa	99	27
Venlafaxine Hcl Er	Venlafaxine Hcl	98	16
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	93	20
Januvia	Sitagliptin Phosphate	92	11
Allopurinol	Allopurinol	88	22
Memantine Hcl	Memantine Hcl	84	12
Montelukast Sodium	Montelukast Sodium	84	24
Alprazolam	Alprazolam	83	15
Donepezil Hcl	Donepezil Hcl	82	15
Fluticasone Propionate	Fluticasone Propionate	79	22
Celecoxib	Celecoxib	77	19
Lorazepam	Lorazepam	77	14
Azithromycin	Azithromycin	76	65
Albuterol Sulfate Hfa	Albuterol Sulfate	74	24
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	70	51
Escitalopram Oxalate	Escitalopram Oxalate	68	15
Finasteride	Finasteride	68	13
Ropinirole Hcl	Ropinirole Hcl	68	13
Levetiracetam	Levetiracetam	67	11
Quetiapine Fumarate	Quetiapine Fumarate	64	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	62	41
Topiramate	Topiramate	55	15
Glipizide	Glipizide	52	15
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	52	14
Xarelto	Rivaroxaban	52	suppressed
Citalopram Hbr	Citalopram Hydrobromide	51	14
Ondansetron Odt	Ondansetron	48	21
Famotidine	Famotidine	47	suppressed
Estradiol	Estradiol	44	11
Bupropion Xl	Bupropion Hcl	43	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	43	14
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	43	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	42	12
Ozempic	Semaglutide	42	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	41	24
Pravastatin Sodium	Pravastatin Sodium	41	13
Warfarin Sodium	Warfarin Sodium	41	14
Hydroxyzine Hcl	Hydroxyzine Hcl	40	suppressed
Aripiprazole	Aripiprazole	38	suppressed
Metoclopramide Hcl	Metoclopramide Hcl	38	suppressed
Pregabalin	Pregabalin	38	suppressed
Etodolac	Etodolac	37	suppressed
Buspirone Hcl	Buspirone Hcl	36	suppressed
Digoxin	Digoxin	36	suppressed
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	36	suppressed
Atenolol	Atenolol	35	suppressed
Alendronate Sodium	Alendronate Sodium	34	suppressed
Olanzapine	Olanzapine	34	suppressed
Cyproheptadine Hcl	Cyproheptadine Hcl	33	suppressed
Diazepam	Diazepam	33	suppressed
Bumetanide	Bumetanide	32	suppressed
Metformin Hcl Er	Metformin Hcl	32	suppressed
Nifedipine Er	Nifedipine	32	suppressed
Verapamil Er	Verapamil Hcl	32	13
Novolin 70-30	Insulin Nph Hum/Reg Insulin Hm	31	suppressed
Sucralfate	Sucralfate	31	suppressed
Ziprasidone Hcl	Ziprasidone Hcl	31	suppressed
Acyclovir	Acyclovir	30	11
Hydralazine Hcl	Hydralazine Hcl	30	suppressed
Nitrofurantoin	Nitrofurantoin Macrocrystal	30	14
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	30	suppressed
Mupirocin	Mupirocin	29	22
Cefuroxime	Cefuroxime Axetil	28	21
Diclofenac Sodium	Diclofenac Sodium	28	12
Doxazosin Mesylate	Doxazosin Mesylate	28	suppressed
Fluconazole	Fluconazole	28	17
Humalog Mix 75-25 Kwikpen	Insulin Lispro Protamin/Lispro	28	suppressed
Meclizine Hcl	Meclizine Hcl	28	suppressed
Rosuvastatin Calcium	Rosuvastatin Calcium	28	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	28	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	27	13
Indapamide	Indapamide	27	suppressed
Novolog Mix 70-30 Flexpen	Insulin Aspart Prot/Insuln Asp	27	suppressed
Nuedexta	Dextromethorphan Hbr/Quinidine	27	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	26	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	26	suppressed
Risperidone	Risperidone	26	suppressed
Amiloride Hcl	Amiloride Hcl	25	suppressed
Cilostazol	Cilostazol	25	suppressed
Guanfacine Hcl	Guanfacine Hcl	25	suppressed
Midodrine Hcl	Midodrine Hcl	25	suppressed
Amiodarone Hcl	Amiodarone Hcl	24	suppressed
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	24	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	24	suppressed
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	23	16
Enalapril Maleate	Enalapril Maleate	23	suppressed
Fludrocortisone Acetate	Fludrocortisone Acetate	23	suppressed
Tizanidine Hcl	Tizanidine Hcl	23	suppressed
Venlafaxine Hcl	Venlafaxine Hcl	23	suppressed
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	22	suppressed
Ibuprofen	Ibuprofen	22	suppressed
Methylprednisolone	Methylprednisolone	22	19
Primidone	Primidone	22	suppressed
Promethazine Hcl	Promethazine Hcl	22	suppressed
Ramipril	Ramipril	22	suppressed
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	21	suppressed
Ipratropium Bromide	Ipratropium Bromide	20	suppressed
Prednisone	Prednisone	20	suppressed
Tiadylt Er	Diltiazem Hcl	20	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	19	suppressed
Ibandronate Sodium	Ibandronate Sodium	19	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	19	suppressed
Dutasteride	Dutasteride	17	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	17	suppressed
Humulin 70-30	Insulin Nph Hum/Reg Insulin Hm	17	suppressed
Lovastatin	Lovastatin	17	suppressed
Nitroglycerin Patch	Nitroglycerin	17	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	17	suppressed
Benztropine Mesylate	Benztropine Mesylate	16	suppressed
Clonidine Hcl	Clonidine Hcl	16	suppressed
Diltiazem Hcl	Diltiazem Hcl	16	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	16	suppressed
Levofloxacin	Levofloxacin	16	14
Stiolto Respimat	Tiotropium Br/Olodaterol Hcl	16	suppressed
Bupropion Hcl Sr	Bupropion Hcl	15	suppressed
Mounjaro	Tirzepatide	15	suppressed
Nitroglycerin	Nitroglycerin	15	12
Spironolactone	Spironolactone	15	suppressed
Arnuity Ellipta	Fluticasone Furoate	14	suppressed
Breo Ellipta	Fluticasone/Vilanterol	14	suppressed
Ceftriaxone	Ceftriaxone Sodium	14	11
Metronidazole	Metronidazole	14	11
Novolog Mix 70-30	Insulin Aspart Prot/Insuln Asp	14	suppressed
Amoxicillin	Amoxicillin	13	suppressed
Desoximetasone	Desoximetasone	13	suppressed
Farxiga	Dapagliflozin Propanediol	13	suppressed
Ondansetron Hcl	Ondansetron Hcl	13	suppressed
Shingrix	Varicella-Zoster Ge/As01b/Pf	13	suppressed
Spiriva Respimat	Tiotropium Bromide	13	suppressed
Carbamazepine	Carbamazepine	12	suppressed
Carbamazepine Er	Carbamazepine	12	suppressed
Divalproex Sodium Er	Divalproex Sodium	12	suppressed
Insulin Syringe	Syringe And Needle,insulin,1ml	12	suppressed
Insulin Syringe	Syringe-Needle,insulin,0.5 Ml	12	suppressed
Isosorbide Dinitrate	Isosorbide Dinitrate	12	suppressed
Linzess	Linaclotide	12	suppressed
Ranolazine Er	Ranolazine	12	suppressed
Ventolin Hfa	Albuterol Sulfate	12	suppressed
Cephalexin	Cephalexin	11	suppressed
Divalproex Sodium	Divalproex Sodium	11	suppressed
Entresto	Sacubitril/Valsartan	11	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	11	suppressed
Leflunomide	Leflunomide	11	suppressed
Lidocaine	Lidocaine	11	suppressed
Olanzapine Odt	Olanzapine	11	suppressed
Oxcarbazepine	Oxcarbazepine	11	suppressed
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	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