What is Gregory Masters's specialty?

Gregory Masters (NPI 1508834680) is a Medicare-billing provider whose primary specialty is Medical Oncology in Newark, DE.

Where does Gregory Masters practice?

Gregory Masters practices in Newark, DE, based on the location reported in the CMS Medicare provider datasets for NPI 1508834680.

How much does Medicare pay Gregory Masters?

Gregory Masters (NPI 1508834680) received approximately $2.8M in total Medicare Part B payments, serving 439 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1508834680

Gregory MastersMD

PRACTICEMEDICAL ONCOLOGY HEMATOLOGY CONSULTANTS PASee all providers at this practice →

Medical OncologyNewark, DEI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,223

Unique beneficiaries

—

Total services

37,675

Distinct HCPCS

Medicare payment

$1.0M

Peer benchmark

Total Medicare services vs. 3 Medical Oncology providers in DE — above median (cohort median 96,285).

PRESCRIBING · PART D · 2024

Total Rx claims

530

Beneficiaries

—

Total drug cost

$1.2M

Distinct drugs

Brand share

27.4%

Top prescribed drugs

Prochlorperazine Maleate61 claims

Osimertinib Mesylate59 claims

Gabapentin51 claims

Ondansetron Hcl35 claims

Levothyroxine Sodium34 claims

QUALITY · MIPS · 2024

Final MIPS score

100.0

Quality

95.5

Cost

0.0

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

1.05%

Individual

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$146

Payment records

By payment type

Food and Beverage$146

Top paying entities

Food and Beverage$146

REFERRAL NETWORK

Where Gregory Masters's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 26 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
CHRISTIANA CARE HEALTH SERVICES, INC.	336	6,380
Laboratory Corporation Of America Holdings Clinical Laboratory · Raritan, NJ	70	270
Daniel Maloney Diagnostic Radiology · Newark, DE	58	203
Shabbir Naqvi Diagnostic Radiology · Hockessin, DE	40	135
Carlos Flores Diagnostic Radiology · Hockessin, DE	33	89
Michael Spina Diagnostic Radiology · Newark, DE	33	93
Kristina Siddall Diagnostic Radiology · North Miami, FL	32	71
Erin Cook Grady Nuclear Medicine · Stanford, CA	30	81
Alberto Iaia Diagnostic Radiology · Hockessin, DE	30	96
Hung Dam Nuclear Medicine · Newark, DE	28	101
CHRISTIANA CARE HOME HEALTH AND COMMUNITY SERVICES, INC.	27	89
Charles Mulligan Thoracic Surgery · Newark, DE	26	269

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events