Healthcare provider profile · identity verified

William Griever, M.D.

Family Practice · HALIFAX, MA · NPI 1316013006

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	751	226
Lisinopril	Lisinopril	478	134
Oxycodone Hcl	Oxycodone Hcl	457	45
Levothyroxine Sodium	Levothyroxine Sodium	400	113
Metoprolol Succinate	Metoprolol Succinate	398	113
Gabapentin	Gabapentin	318	65
Losartan Potassium	Losartan Potassium	305	90
Omeprazole	Omeprazole	301	100
Amlodipine Besylate	Amlodipine Besylate	296	101
Clonazepam	Clonazepam	286	29
Alprazolam	Alprazolam	220	30
Lorazepam	Lorazepam	204	42
Trazodone Hcl	Trazodone Hcl	182	50
Eliquis	Apixaban	181	35
Sertraline Hcl	Sertraline Hcl	175	43
Albuterol Sulfate Hfa	Albuterol Sulfate	168	67
Famotidine	Famotidine	168	51
Pantoprazole Sodium	Pantoprazole Sodium	155	44
Atenolol	Atenolol	154	39
Metformin Hcl	Metformin Hcl	149	46
Pravastatin Sodium	Pravastatin Sodium	145	39
Citalopram Hbr	Citalopram Hydrobromide	141	36
Simvastatin	Simvastatin	141	46
Tamsulosin Hcl	Tamsulosin Hcl	133	33
Hydrochlorothiazide	Hydrochlorothiazide	129	39
Metformin Hcl Er	Metformin Hcl	128	37
Furosemide	Furosemide	126	38
Morphine Sulfate Er	Morphine Sulfate	111	12
Tramadol Hcl	Tramadol Hcl	107	24
Fluticasone Propionate	Fluticasone Propionate	106	47
Pregabalin	Pregabalin	101	15
Rosuvastatin Calcium	Rosuvastatin Calcium	101	35
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	99	suppressed
Jardiance	Empagliflozin	98	24
Baclofen	Baclofen	93	33
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	93	22
Abrysvo	Rsv Vacc, Pref A And Pref B/Pf	92	92
Glimepiride	Glimepiride	90	25
Duloxetine Hcl	Duloxetine Hcl	88	19
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	88	20
Allopurinol	Allopurinol	85	22
Testosterone Cypionate	Testosterone Cypionate	80	suppressed
Meloxicam	Meloxicam	72	23
Ropinirole Hcl	Ropinirole Hcl	72	15
Shingrix	Varicella-Zoster Ge/As01b/Pf	71	58
Incruse Ellipta	Umeclidinium Bromide	70	13
Spironolactone	Spironolactone	68	20
Zolpidem Tartrate	Zolpidem Tartrate	68	16
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	67	16
Escitalopram Oxalate	Escitalopram Oxalate	66	21
Ozempic	Semaglutide	66	14
Venlafaxine Hcl Er	Venlafaxine Hcl	66	15
Finasteride	Finasteride	65	16
Prednisone	Prednisone	64	47
Buspirone Hcl	Buspirone Hcl	58	15
Clopidogrel	Clopidogrel Bisulfate	58	16
Diazepam	Diazepam	58	suppressed
Hydromorphone Hcl	Hydromorphone Hcl	58	suppressed
Tizanidine Hcl	Tizanidine Hcl	58	14
Metoprolol Tartrate	Metoprolol Tartrate	57	18
Doxycycline Monohydrate	Doxycycline Monohydrate	55	36
Fluoxetine Hcl	Fluoxetine Hcl	55	21
Alendronate Sodium	Alendronate Sodium	54	22
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	53	13
Ibuprofen	Ibuprofen	52	18
Ventolin Hfa	Albuterol Sulfate	52	19
Ondansetron Hcl	Ondansetron Hcl	48	15
Potassium Chloride	Potassium Chloride	48	15
Trulicity	Dulaglutide	48	12
Carvedilol	Carvedilol	47	15
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	46	suppressed
Montelukast Sodium	Montelukast Sodium	46	11
Oxybutynin Chloride Er	Oxybutynin Chloride	45	suppressed
Mirtazapine	Mirtazapine	44	13
Azelastine Hcl	Azelastine Hcl	42	21
Meclizine Hcl	Meclizine Hcl	42	suppressed
Testosterone	Testosterone	42	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	42	19
Fentanyl	Fentanyl	40	suppressed
Januvia	Sitagliptin Phosphate	39	suppressed
Oxycontin	Oxycodone Hcl	39	suppressed
Donepezil Hcl	Donepezil Hcl	38	suppressed
Valacyclovir	Valacyclovir Hcl	38	16
Boostrix Tdap	Diphth,pertuss(Acell),tet Vac	37	37
Sumatriptan Succinate	Sumatriptan Succinate	36	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	35	28
Celecoxib	Celecoxib	34	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	34	suppressed
Torsemide	Torsemide	34	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	32	suppressed
Warfarin Sodium	Warfarin Sodium	31	suppressed
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	30	suppressed
Klor-Con M20	Potassium Chloride	30	suppressed
Mounjaro	Tirzepatide	30	suppressed
Mupirocin	Mupirocin	30	14
Amitriptyline Hcl	Amitriptyline Hcl	29	suppressed
Entresto	Sacubitril/Valsartan	29	suppressed
Estradiol	Estradiol	29	14
Nystatin	Nystatin	29	12
Nitroglycerin	Nitroglycerin	28	17
Tradjenta	Linagliptin	28	suppressed
Cephalexin	Cephalexin	27	24
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	27	suppressed
Farxiga	Dapagliflozin Propanediol	27	suppressed
Azithromycin	Azithromycin	26	23
Lamotrigine	Lamotrigine	26	suppressed
Paroxetine Hcl	Paroxetine Hcl	26	suppressed
Hydrocortisone	Hydrocortisone	24	15
Levetiracetam	Levetiracetam	24	suppressed
Valsartan	Valsartan	24	suppressed
Amoxicillin	Amoxicillin	23	19
Breo Ellipta	Fluticasone/Vilanterol	23	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	23	suppressed
Fenofibrate	Fenofibrate,micronized	23	suppressed
Memantine Hcl	Memantine Hcl	23	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	23	suppressed
Dextroamphetamine-Amphet Er	Dextroamphetamine/Amphetamine	22	suppressed
Ezetimibe	Ezetimibe	22	suppressed
Trospium Chloride	Trospium Chloride	22	suppressed
Xarelto	Rivaroxaban	22	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	21	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	21	suppressed
Nifedipine Er	Nifedipine	21	suppressed
Ondansetron Odt	Ondansetron	21	11
Promethazine Hcl	Promethazine Hcl	21	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	20	suppressed
Dilt-Xr	Diltiazem Hcl	20	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	20	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	20	suppressed
Bupropion Xl	Bupropion Hcl	19	suppressed
Glipizide-Metformin	Glipizide/Metformin Hcl	19	suppressed
Ketoconazole	Ketoconazole	19	suppressed
Bupropion Hcl Sr	Bupropion Hcl	18	suppressed
Diclofenac Sodium	Diclofenac Sodium	18	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	18	suppressed
Ibu	Ibuprofen	18	suppressed
Methylphenidate Hcl	Methylphenidate Hcl	18	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	18	suppressed
Naproxen	Naproxen	18	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	18	suppressed
Divalproex Sodium	Divalproex Sodium	17	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	16	suppressed
Levalbuterol Tartrate Hfa	Levalbuterol Tartrate	16	suppressed
Propranolol Hcl	Propranolol Hcl	16	suppressed
Sulindac	Sulindac	16	suppressed
Bumetanide	Bumetanide	15	suppressed
Eszopiclone	Eszopiclone	15	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	15	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	15	suppressed
Methimazole	Methimazole	15	suppressed
Olanzapine	Olanzapine	15	suppressed
Primidone	Primidone	15	suppressed
Procto-Med Hc	Hydrocortisone	15	suppressed
Topiramate	Topiramate	15	suppressed
Betamethasone Dipropionate	Betamethasone Dipropionate	14	suppressed
Fluconazole	Fluconazole	14	suppressed
Labetalol Hcl	Labetalol Hcl	14	suppressed
Lovastatin	Lovastatin	14	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	14	suppressed
Venlafaxine Hcl	Venlafaxine Hcl	14	suppressed
Dulera	Mometasone/Formoterol	13	suppressed
Epinephrine	Epinephrine	13	suppressed
Hydralazine Hcl	Hydralazine Hcl	13	suppressed
Lidocaine	Lidocaine	13	suppressed
Memantine Hcl Er	Memantine Hcl	13	suppressed
Methocarbamol	Methocarbamol	13	suppressed
Spiriva Respimat	Tiotropium Bromide	13	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	13	13
Synthroid	Levothyroxine Sodium	13	suppressed
Tolterodine Tartrate Er	Tolterodine Tartrate	13	suppressed
Ultra-Fine Short Pen Needle	Pen Needle, Diabetic	13	suppressed
Clonidine	Clonidine	12	suppressed
Digoxin	Digoxin	12	suppressed
Fludrocortisone Acetate	Fludrocortisone Acetate	12	suppressed
Propranolol Hcl Er	Propranolol Hcl	12	suppressed
Sucralfate	Sucralfate	12	suppressed
Terazosin Hcl	Terazosin Hcl	12	suppressed
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	12	suppressed
Xtampza Er	Oxycodone Myristate	12	suppressed
Clindamycin Phosphate	Clindamycin Phosphate	11	suppressed
Clonidine Hcl	Clonidine Hcl	11	suppressed
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	11	suppressed
Humalog Kwikpen U-200	Insulin Lispro	11	suppressed
Levorphanol Tartrate	Levorphanol Tartrate	11	suppressed
Methylphenidate Er	Methylphenidate Hcl	11	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	11	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	11	suppressed
Yuvafem	Estradiol	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