GREGORY A MASTERS MD
NPI 1508834680
Internal Medicine - Medical Oncology in Newark, DE

Active since March 14, 2006PECOS EnrolledAccepts Medicare Assignment
94/100
CMS Quality Rating
4701 OGLETOWN STANTON RD, SUITE 2200, NEWARK, DE 19713(302) 366-1200(302) 366-1700 Get Directions Write a Review

NPPES record last updated: September 27, 2007. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Gregory A Masters Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GREGORY A MASTERS MD (NPI 1508834680) is an individual medical oncology provider in Newark, Delaware, licensed in Delaware (C10006866) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS and is a graduate of Northwestern University Feinberg Medical School (1990).

NPPES Registry Identity

NPI1508834680
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NameGREGORY A MASTERSCredential: MD
Location Address4701 OGLETOWN STANTON RD, SUITE 2200Newark, DE 19713-2055
Mailing Address4701 Ogletown Stanton Rd, Suite 2200Newark, DE 19713-2055 · (302) 366-1200 · Fax (302) 366-1700
Fax(302) 366-1700
Sole ProprietorNo
Medical School CMSNorthwestern University Feinberg Medical SchoolGraduated 1990
Enumeration DateMarch 14, 2006
Last NPPES UpdateSeptember 27, 2007
NPI 1508834680 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
License Licensed in DE · C10006866
Definition

An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.

4701 OGLETOWN STANTON RD, Newark, DE 19713

Other Identifiers 3

Medicare UPING22923
Medicaid1000022975DE
Medicare PIN011241M56DE

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Gregory A Masters Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2961433388
PECOS Enrollment IDI20100225000458
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 34

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection, pembrolizumab, 1 mg J9271
Pembrolizumab is a medication given via injection to help your body's immune system fight certain types of cancer. It's typically administered in a hospital or clinic by a healthcare professional.
14,200 services19 patients
Injection, denosumab, 1 mg J0897
Denosumab is a medication given via injection to strengthen your bones. It works by slowing down the cells that break down bone, improving bone density and reducing the risk of fractures. It's often used for osteoporosis treatment.
7,860 services25 patients
Injection, paclitaxel, 1 mg J9267
Paclitaxel is a medication administered via injection to treat various types of cancer. It works by inhibiting cell division, thus preventing cancer cells from growing and multiplying. Each dose is tailored to the patient's body size.
7,156 services18 patients
Injection, dexamethasone sodium phosphate, 1 mg J1100
Dexamethasone sodium phosphate is a medication given via injection. It is a type of steroid that helps reduce inflammation and immune responses. It can be used to treat a variety of conditions, such as allergies, skin conditions, arthritis, and more.
2,488 services66 patients
Injection, palonosetron hcl, 25 mcg J2469
Palonosetron HCL is an injection used to prevent nausea and vomiting caused by chemotherapy. It works by blocking a natural substance (serotonin) in the body that can cause vomiting. This helps improve your comfort during cancer treatment.
570 services20 patients
Injection, leucovorin calcium, per 50 mg J0640
Leucovorin calcium is an injection given to enhance the effectiveness of certain cancer treatments or to reduce the harmful effects of some medications. The dose is determined by your doctor and is typically administered in a healthcare setting.
544 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 19713 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$173.08 typical visit price
range $57.12 – $173.08
Typical copayment $43.27 (range $14.28 – $43.27)
Most-billed visit code 99205
Established Patient
$100.68 typical visit price
range $18.36 – $141.05
Typical copayment $25.17 (range $4.59 – $35.26)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

94/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Individually scored
Quality80
Promoting Interoperability100
Improvement Activities40

Reported Quality Measures

Advance Care Plan
95%314 patients4/55-star benchmark: 100%
Oncology: Advance Care Planning in Metastatic Cancer Patients
71%113 patients4/55-star benchmark: 85%
Oncology: Medical and Radiation - Pain Intensity Quantified
100%369 patients5/55-star benchmark: 100%
Oncology: Supportive Care Drug Utilization in Last 14 Days of Life
Lower rates are better for this measure.
5%20 patients
Preventive Care and Screening: Screening for Depression and Follow-Up Plan
97%387 patients5/55-star benchmark: 97%
Provide Patients Electronic Access to Their Health Information
100%234 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
2 suppliers20 claims20 services$15.29 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
4 suppliers37 claims37 services$71.72 avg. paid by Medicare
Portable oxygen concentrator, rental E1392
DME-Oxygen and Supplies · category DC002N
2 suppliers17 claims17 services$31.68 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Surgery
4701 OGLETOWN STANTON RD, SUITE 1500
NEWARK, DE 19713
Internal Medicine (Hematology)
4701 OGLETOWN STANTON RD, STE 4200
NEWARK, DE 19713
Nurse Practitioner
4701 OGLETOWN STANTON RD, HELEN GRAHAM CANCER CENTER SUITE 1109
NEWARK, DE 19713
Internal Medicine (Hematology & Oncology)
4701 OGLETOWN STANTON RD, STE 2400
NEWARK, DE 19713
Internal Medicine (Hematology & Oncology)
4701 OGLETOWN STANTON RD, SUITE 3400
NEWARK, DE 19713
Nurse Practitioner (Adult Health)
4701 OGLETOWN STANTON RD, SUITE 2400
NEWARK, DE 19713
Physician Assistant (Medical)
4701 OGLETOWN STANTON RD, SUITE 2300
NEWARK, DE 19713
Internal Medicine (Hematology & Oncology)
4701 OGLETOWN STANTON RD, SUITE 2400
NEWARK, DE 19713

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gregory Masters's NPI number?

The NPI number for Gregory Masters is 1508834680. It was assigned to this individual provider in the NPPES registry on March 14, 2006.

Where is Gregory Masters located?

Gregory Masters practices at 4701 Ogletown Stanton Rd Suite 2200, Newark, DE 19713. The listed phone number is (302) 366-1200.

What is Gregory Masters's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is Gregory Masters enrolled in Medicare?

Yes. Gregory Masters is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Gregory Masters accept?

Health plans from AmeriHealth Caritas Next and Highmark Blue Cross Blue Shield Delaware list Gregory Masters as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Gregory Masters was last updated on September 27, 2007. NPI Profile syncs with the weekly NPPES data releases published by CMS.