Healthcare provider profile · identity verified

Martha L Gray, MD

Internal Medicine · ANN ARBOR, MI · NPI 1801892294

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	897	249
Levothyroxine Sodium	Levothyroxine Sodium	662	165
Amlodipine Besylate	Amlodipine Besylate	661	184
Lisinopril	Lisinopril	629	170
Losartan Potassium	Losartan Potassium	554	156
Hydrochlorothiazide	Hydrochlorothiazide	506	140
Simvastatin	Simvastatin	390	104
Lovastatin	Lovastatin	363	94
Metformin Hcl	Metformin Hcl	342	94
Omeprazole	Omeprazole	331	86
Furosemide	Furosemide	309	92
Metoprolol Succinate	Metoprolol Succinate	306	80
Sertraline Hcl	Sertraline Hcl	200	54
Atenolol	Atenolol	178	46
Metoprolol Tartrate	Metoprolol Tartrate	174	46
Albuterol Sulfate Hfa	Albuterol Sulfate	167	66
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	157	43
Eliquis	Apixaban	148	40
Gabapentin	Gabapentin	130	38
Spironolactone	Spironolactone	126	33
Allopurinol	Allopurinol	120	36
Citalopram Hbr	Citalopram Hydrobromide	115	33
Trazodone Hcl	Trazodone Hcl	94	31
Xarelto	Rivaroxaban	94	23
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	89	25
Rosuvastatin Calcium	Rosuvastatin Calcium	89	27
Potassium Chloride	Potassium Chloride	81	26
Tamsulosin Hcl	Tamsulosin Hcl	78	25
Pravastatin Sodium	Pravastatin Sodium	73	20
Carvedilol	Carvedilol	72	23
Warfarin Sodium	Warfarin Sodium	63	13
Clopidogrel	Clopidogrel Bisulfate	58	15
Escitalopram Oxalate	Escitalopram Oxalate	57	12
Alendronate Sodium	Alendronate Sodium	56	17
Pantoprazole Sodium	Pantoprazole Sodium	55	19
Paroxetine Hcl	Paroxetine Hcl	55	16
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	53	30
Mirtazapine	Mirtazapine	50	16
Metformin Hcl Er	Metformin Hcl	48	15
Fluoxetine Hcl	Fluoxetine Hcl	47	12
Glipizide	Glipizide	46	13
Venlafaxine Hcl Er	Venlafaxine Hcl	45	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	44	13
Buspirone Hcl	Buspirone Hcl	42	13
Montelukast Sodium	Montelukast Sodium	42	12
Ozempic	Semaglutide	42	suppressed
Duloxetine Hcl	Duloxetine Hcl	41	suppressed
Famotidine	Famotidine	41	suppressed
Fluticasone Propionate	Fluticasone Propionate	41	22
Synthroid	Levothyroxine Sodium	40	11
Isosorbide Mononitrate Er	Isosorbide Mononitrate	39	12
Januvia	Sitagliptin Phosphate	39	suppressed
Prednisone	Prednisone	38	23
Jardiance	Empagliflozin	37	14
Donepezil Hcl	Donepezil Hcl	35	13
Estradiol	Estradiol	35	15
Acyclovir	Acyclovir	33	19
Bupropion Xl	Bupropion Hcl	33	suppressed
Chlorthalidone	Chlorthalidone	33	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	33	suppressed
Spironolactone-Hctz	Spironolact/Hydrochlorothiazid	33	suppressed
Cephalexin	Cephalexin	31	28
Bupropion Hcl Sr	Bupropion Hcl	30	11
Nitroglycerin	Nitroglycerin	29	suppressed
Tizanidine Hcl	Tizanidine Hcl	29	suppressed
Bumetanide	Bumetanide	28	suppressed
Ezetimibe	Ezetimibe	28	11
Triamcinolone Acetonide	Triamcinolone Acetonide	28	18
Amiodarone Hcl	Amiodarone Hcl	26	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	26	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	26	suppressed
Ultra-Fine Short Pen Needle	Pen Needle, Diabetic	26	12
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	25	24
Celecoxib	Celecoxib	25	suppressed
Colestipol Hcl	Colestipol Hcl	25	suppressed
Valacyclovir	Valacyclovir Hcl	25	suppressed
Novolog Flexpen	Insulin Aspart	24	suppressed
Klor-Con M20	Potassium Chloride	23	suppressed
Propranolol Hcl	Propranolol Hcl	23	suppressed
Amoxicillin	Amoxicillin	22	19
Dicyclomine Hcl	Dicyclomine Hcl	22	suppressed
Ibuprofen	Ibuprofen	22	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	21	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	21	19
Enalapril Maleate	Enalapril Maleate	20	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	20	suppressed
Nifedipine Er	Nifedipine	20	suppressed
Propranolol Hcl Er	Propranolol Hcl	20	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	20	suppressed
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	20	suppressed
Methocarbamol	Methocarbamol	19	suppressed
Olanzapine	Olanzapine	19	suppressed
Bisoprolol Fumarate	Bisoprolol Fumarate	18	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	18	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	18	suppressed
Methylphenidate Hcl	Methylphenidate Hcl	17	suppressed
Naproxen	Naproxen	17	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	17	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	17	suppressed
Verapamil Er	Verapamil Hcl	17	suppressed
Levetiracetam	Levetiracetam	16	suppressed
Trimethoprim	Trimethoprim	16	12
Azithromycin	Azithromycin	15	14
Paxlovid	Nirmatrelvir/Ritonavir	15	15
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	14	suppressed
Budesonide-Formoterol Fumarate	Budesonide/Formoterol Fumarate	14	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	14	suppressed
Finasteride	Finasteride	14	suppressed
Nystatin	Nystatin	14	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	13	suppressed
Desvenlafaxine Succinate Er	Desvenlafaxine Succinate	13	suppressed
Glyburide	Glyburide	13	suppressed
Advair Hfa	Fluticasone Propion/Salmeterol	12	suppressed
Hydralazine Hcl	Hydralazine Hcl	12	suppressed
Incruse Ellipta	Umeclidinium Bromide	12	suppressed
Mupirocin	Mupirocin	12	suppressed
Ropinirole Hcl	Ropinirole Hcl	12	suppressed
Amiloride-Hydrochlorothiazide	Amiloride/Hydrochlorothiazide	11	suppressed
Bisoprolol-Hydrochlorothiazide	Bisoprolol/Hydrochlorothiazide	11	suppressed
Glipizide Er	Glipizide	11	suppressed
Humulin 70/30 Kwikpen	Insulin Nph Hum/Reg Insulin Hm	11	suppressed
Humulin N Kwikpen	Insulin Nph Human Isophane	11	suppressed
Indapamide	Indapamide	11	suppressed
Irbesartan	Irbesartan	11	suppressed
Meloxicam	Meloxicam	11	suppressed
Methylphenidate Er	Methylphenidate Hcl	11	suppressed
Metronidazole	Metronidazole	11	suppressed
Premarin	Estrogens, Conjugated	11	suppressed
Symbicort	Budesonide/Formoterol Fumarate	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