Healthcare provider profile · identity verified

Malcolm C Masteller, M.D.

Family Practice · BREMERTON, WA · NPI 1255368148

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	445	136
Levothyroxine Sodium	Levothyroxine Sodium	316	83
Omeprazole	Omeprazole	230	66
Losartan Potassium	Losartan Potassium	185	56
Gabapentin	Gabapentin	172	53
Metformin Hcl Er	Metformin Hcl	162	50
Pregabalin	Pregabalin	158	22
Tramadol Hcl	Tramadol Hcl	158	31
Rosuvastatin Calcium	Rosuvastatin Calcium	148	45
Lisinopril	Lisinopril	146	51
Tamsulosin Hcl	Tamsulosin Hcl	126	39
Potassium Chloride	Potassium Chloride	124	31
Duloxetine Hcl	Duloxetine Hcl	121	31
Pantoprazole Sodium	Pantoprazole Sodium	118	32
Montelukast Sodium	Montelukast Sodium	117	32
Metformin Hcl	Metformin Hcl	113	32
Eliquis	Apixaban	99	22
Trazodone Hcl	Trazodone Hcl	98	33
Furosemide	Furosemide	93	28
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	93	19
Metoprolol Succinate	Metoprolol Succinate	93	30
Amlodipine Besylate	Amlodipine Besylate	90	29
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	88	13
Zolpidem Tartrate	Zolpidem Tartrate	84	14
Trulicity	Dulaglutide	75	18
Alendronate Sodium	Alendronate Sodium	73	25
Ozempic	Semaglutide	73	16
Hydrochlorothiazide	Hydrochlorothiazide	69	23
Celecoxib	Celecoxib	68	24
Oxycodone Hcl	Oxycodone Hcl	67	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	65	19
Albuterol Sulfate Hfa	Albuterol Sulfate	64	33
Abrysvo	Rsv Vacc, Pref A And Pref B/Pf	63	63
Bupropion Xl	Bupropion Hcl	62	19
Famotidine	Famotidine	61	18
Jardiance	Empagliflozin	58	16
Ondansetron Odt	Ondansetron	55	15
Doxycycline Hyclate	Doxycycline Hyclate	53	39
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	53	15
Propranolol Hcl	Propranolol Hcl	51	18
Fluticasone Propionate	Fluticasone Propionate	50	19
Lorazepam	Lorazepam	48	suppressed
Simvastatin	Simvastatin	46	11
Tizanidine Hcl	Tizanidine Hcl	46	suppressed
Finasteride	Finasteride	44	13
Spironolactone	Spironolactone	41	11
Amitriptyline Hcl	Amitriptyline Hcl	38	suppressed
Morphine Sulfate Er	Morphine Sulfate	37	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	36	suppressed
Sertraline Hcl	Sertraline Hcl	36	suppressed
Vitamin D2	Ergocalciferol (Vitamin D2)	35	suppressed
Allopurinol	Allopurinol	34	12
Escitalopram Oxalate	Escitalopram Oxalate	34	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	34	13
Diclofenac Sodium	Diclofenac Sodium	32	11
Prednisone	Prednisone	32	23
Temazepam	Temazepam	32	suppressed
Chlorthalidone	Chlorthalidone	31	suppressed
Carvedilol	Carvedilol	30	suppressed
Clopidogrel	Clopidogrel Bisulfate	30	suppressed
Ondansetron Hcl	Ondansetron Hcl	30	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	29	suppressed
Pravastatin Sodium	Pravastatin Sodium	28	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	27	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	27	suppressed
Cephalexin	Cephalexin	26	15
Primidone	Primidone	26	suppressed
Dextroamphetamine-Amphet Er	Dextroamphetamine/Amphetamine	25	suppressed
Linzess	Linaclotide	25	suppressed
Testosterone Cypionate	Testosterone Cypionate	25	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	25	suppressed
Ipratropium Bromide	Ipratropium Bromide	24	suppressed
Bupropion Hcl Sr	Bupropion Hcl	23	suppressed
Synthroid	Levothyroxine Sodium	23	suppressed
Citalopram Hbr	Citalopram Hydrobromide	22	suppressed
Colchicine	Colchicine	22	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	22	suppressed
Valsartan	Valsartan	22	suppressed
Clonazepam	Clonazepam	21	suppressed
Fluconazole	Fluconazole	21	16
Promethazine Hcl	Promethazine Hcl	21	suppressed
Propranolol Hcl Er	Propranolol Hcl	21	suppressed
Desvenlafaxine Succinate Er	Desvenlafaxine Succinate	20	suppressed
Farxiga	Dapagliflozin Propanediol	20	suppressed
Glipizide Er	Glipizide	20	suppressed
Methocarbamol	Methocarbamol	20	suppressed
Arnuity Ellipta	Fluticasone Furoate	19	suppressed
Bumetanide	Bumetanide	19	suppressed
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	19	suppressed
Sucralfate	Sucralfate	19	suppressed
Torsemide	Torsemide	19	suppressed
Tradjenta	Linagliptin	19	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	19	13
Cyanocobalamin Injection	Cyanocobalamin (Vitamin B-12)	18	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	18	suppressed
Ezetimibe	Ezetimibe	18	suppressed
Ketoconazole	Ketoconazole	18	11
Mirtazapine	Mirtazapine	18	suppressed
Paroxetine Hcl	Paroxetine Hcl	18	suppressed
Alprazolam	Alprazolam	17	suppressed
Mounjaro	Tirzepatide	17	suppressed
Dextrose In Lactated Ringers	Dextrose 5%-Lactated Ringers	16	suppressed
Digoxin	Digoxin	16	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	16	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	16	12
Valacyclovir	Valacyclovir Hcl	16	suppressed
Lovastatin	Lovastatin	15	suppressed
Naloxone Hcl	Naloxone Hcl	15	12
Ropinirole Hcl	Ropinirole Hcl	15	suppressed
Xarelto	Rivaroxaban	15	suppressed
Buspirone Hcl	Buspirone Hcl	14	suppressed
Glipizide	Glipizide	14	suppressed
Ibandronate Sodium	Ibandronate Sodium	14	suppressed
Rybelsus	Semaglutide	14	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	14	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	14	suppressed
Ventolin Hfa	Albuterol Sulfate	14	suppressed
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	13	suppressed
Metoprolol Tartrate	Metoprolol Tartrate	13	suppressed
Shingrix	Varicella-Zoster Ge/As01b/Pf	13	13
Singulair	Montelukast Sodium	13	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	12	12
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	12	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	12	suppressed
Eszopiclone	Eszopiclone	12	suppressed
Ibuprofen	Ibuprofen	12	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	12	suppressed
Meloxicam	Meloxicam	12	suppressed
Nitrofurantoin	Nitrofurantoin Macrocrystal	12	suppressed
Azelastine Hcl	Azelastine Hcl	11	suppressed
Breo Ellipta	Fluticasone/Vilanterol	11	suppressed
Diazepam	Diazepam	11	suppressed
Estradiol	Estradiol	11	suppressed
Hydralazine Hcl	Hydralazine Hcl	11	suppressed
Levetiracetam	Levetiracetam	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