GREGORY A MAGGASS MD
NPI 1124093539
Radiology - Radiation Oncology in Scottsdale, AZ

Q: What is Gregory Maggass's NPI number?

The NPI number for Gregory Maggass is 1124093539. It was assigned to this individual provider in the NPPES registry on February 20, 2006.

Q: What is Gregory Maggass's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

Q: When was this NPI record last updated?

The NPPES record for Gregory Maggass was last updated on August 9, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since February 20, 2006PECOS EnrolledAccepts Medicare Assignment

9055 E DEL CAMINO DR, STE 200, SCOTTSDALE, AZ 85258(480) 922-4600(480) 922-5231 Get Directions Write a Review

NPPES record last updated: August 9, 2010. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Gregory A Maggass Md NPPES

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

GREGORY A MAGGASS MD (NPI 1124093539) is an individual radiation oncology provider in Scottsdale, Arizona, licensed in Arizona (17059) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS and is a graduate of Medical College Of Wisconsin (1983).

NPPES Registry Identity

NPI1124093539

Entity TypeIndividualMale

Primary Taxonomy2085R0001X

Provider Legal NameGREGORY A MAGGASSCredential: MD

Location Address9055 E DEL CAMINO DR, STE 200Scottsdale, AZ 85258-2351

Mailing AddressPo Box 3106Los Angeles, CA 90078-3106 · (480) 922-4600 · Fax (480) 922-5231

Phone(480) 922-4600

Fax(480) 922-5231

Sole ProprietorNo

Medical School CMSMedical College Of WisconsinGraduated 1983

Enumeration DateFebruary 20, 2006

Last NPPES UpdateAugust 9, 2010

✔ NPI 1124093539 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Radiation OncologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0001X

License✔ Licensed in AZ · 17059

Definition

A radiologist who deals with the therapeutic applications of radiant energy and its modifiers and the study and management of disease, especially malignant tumors.

9055 E DEL CAMINO DR, Scottsdale, AZ 85258

Open in Google Maps ↗

Other Identifiers 4

Medicare PINZ30WCHJD01AZ

Medicare UPIND44191AZ

Medicare PINZ126799AZ

Other270687AZ · Ahcccs

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter Health, Blue Cross Blue Shield of Arizona and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Gregory A Maggass 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 ID4981509833

PECOS Enrollment IDI20090108000695

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.

Medicare Billing Reassignment

Medicare enrollment records show Gregory Maggass reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Arizona Center For Hematology And Oncology, Plc

Same address

Hematology & Oncology

9055 E DEL CAMINO DR, SUITE 100
Scottsdale, AZ 85258

Reassigned Medicare billing, Arizona enrollment
85 clinicians in this Medicare group

NPI 1487903118 (602) 938-2848

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 21

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.

Ct guidance for insertion of radiation therapy fields 77014

CT guidance for insertion of radiation therapy fields involves using a CT scan to accurately map the area of your body where radiation will be applied. This ensures the radiation targets only the necessary area, minimizing impact to healthy tissues.

588 services132 patients

Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session G6015

Intensity-modulated radiation therapy (IMRT) is a type of cancer treatment. It uses advanced technology to manipulate photon beams of radiation to conform to the shape of a tumor. IMRT allows for the radiation dose to conform more precisely to the three-dimensional shape of the tumor by modulatingâ€”or controllingâ€”the intensity of the radiation beam. This can result in better tumor control and less harm to healthy tissue.

545 services115 patients

Intra-fraction localization and tracking of target or patient motion during delivery of radiation therapy (eg,3d positional tracking, gating, 3d surface tracking), each fraction of treatment G6017

In radiation therapy, intra-fraction localization and tracking monitor patient or target movement during treatment. This ensures that radiation is accurately delivered to the correct area. Techniques like 3D positional tracking, gating, and 3D surface tracking are used to enhance precision.

541 services130 patients

Calculation of radiation therapy dose 77300

Radiation therapy dose calculation is a process to determine the exact amount of radiation needed to treat a specific area in the body. This calculation helps ensure the treatment is effective while minimizing harm to healthy tissues. It's a key part of planning your radiation therapy.

248 services65 patients

Continuing radiation therapy consultation per week 77336

Continuing radiation therapy consultation per week involves regular meetings with your healthcare team. These sessions help monitor your progress, manage side effects, and adjust your treatment plan if necessary. It's a key part of ensuring the effectiveness of your radiation therapy.

181 services59 patients

Radiation treatment management, 5 treatment sessions 77427

Radiation treatment management involves a series of 5 sessions where targeted radiation is used to destroy or shrink cancer cells in your body. Each session is carefully planned to maximize effectiveness while minimizing harm to healthy tissues. You may experience side effects which will be closely monitored and managed for your comfort.

164 services60 patients

Design and construction of radiation treatment device for high precision radiation therapy 77338

A radiation treatment device is custom-made for each patient to target cancer cells with high precision. It's designed to focus radiation on the tumor, sparing healthy tissue. This process ensures effective therapy while minimizing side effects.

70 services48 patients

Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 6-10 mev G6012

Radiation therapy involves directing high-energy particles to destroy cancer cells. The technique targets 3 or more areas, using custom blocks for precise focus. Tangential ports, wedges, and rotational beams adjust the radiation's path, while compensators balance radiation dose. Electron beam therapy with 6-10 mev energy is used for deep-seated tumors.

69 services24 patients

Complex radiation therapy planning 77263

Complex radiation therapy planning is a process to determine the most effective way to deliver radiation to a specific area in your body. It involves detailed imaging to map your body's structure, allowing for precise targeting of cancer cells while sparing healthy tissue.

66 services59 patients

High precision radiation therapy planning 77301

High precision radiation therapy planning involves detailed mapping of your body to target cancer cells accurately. Advanced imaging techniques help identify the exact location of the tumor, minimizing harm to healthy tissues. This personalized approach enhances effectiveness and reduces side effects.

66 services47 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

64 services64 patients

Design and construction of complex radiation treatment device 77334

The design and construction of a complex radiation treatment device is a process where a specialized instrument is created. This device targets harmful cells with high-energy rays to destroy or damage them, while minimizing impact on healthy cells. This aids in treating conditions like cancer.

53 services40 patients

Special radiation treatment 77470

Special radiation treatment is a medical procedure that uses high-energy rays to destroy or damage cancer cells. It's a targeted approach that aims to minimize harm to healthy tissues. The treatment duration varies based on individual health conditions.

41 services33 patients

Telephone medical discussion with physician, 5-10 minutes 99441

A telephone medical discussion with a physician is a brief, 5-10 minute call where you can discuss your health concerns. It's a convenient way to receive medical advice without needing to visit a clinic. It's important to prepare questions in advance to make the most of this time.

41 services35 patients

Special medical radiation therapy consultation 77370

A special medical radiation therapy consultation involves discussing the use of high-energy radiation to treat diseases, primarily cancer. It's a chance to understand the process, potential side effects, and benefits. It is a key step in planning your treatment.

30 services28 patients

Image-guided robotic linear accelerator-based stereotactic radiosurgery, delivery including collimator changes and custom plugging, fractionated treatment, all lesions, per session, second through fifth sessions, maximum five sessions per course of treatme G0340

This treatment uses high-precision radiation, guided by real-time imaging, to target tumors. A robotic linear accelerator shapes the radiation to match the tumor, reducing harm to healthy tissue. The treatment is spread over 2-5 sessions and is limited to 5 sessions per course.

23 services15 patients

Obtaining data needed to develop the optimal radiation treatment, 3 or more treatment areas or any number of treatment areas where special treatment is involved 77290

This procedure involves collecting necessary data to plan the best radiation treatment. It may cover 3 or more areas or any area requiring special attention. Data collection includes imaging scans and tests to understand the disease's extent and to tailor a precise, effective treatment plan.

19 services17 patients

Design and construction of simple radiation treatment device 77332

A simple radiation treatment device is designed and built to target specific areas in your body with high energy rays. This process is carefully planned to ensure that the radiation accurately reaches the area needing treatment, while minimizing exposure to healthy tissues.

12 services11 patients

Ultrasonic guidance for administration of radiation therapy 76965

Ultrasonic guidance for radiation therapy is a technique that uses ultrasound images to accurately target the area requiring treatment. It helps ensure radiation is directed precisely, reducing harm to healthy tissues.

11 services11 patients

Design and construction of complex radiation treatment device 77334

11 services11 patients

Complex application of radiation source 77778

Complex application of radiation source is a medical procedure used in cancer treatment. It involves the careful placement of radioactive materials in or near the tumor. This helps to destroy cancer cells while minimizing damage to healthy tissues. It's a precise and targeted approach.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85258 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

$168.60 typical visit price

range $55.44 – $168.60

Typical copayment $42.15 (range $13.86 – $42.15)

Most-billed visit code 99205

Established Patient

$69.24 typical visit price

range $17.72 – $137.41

Typical copayment $17.31 (range $4.43 – $34.35)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

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

MICHAEL S GORDON MD

Internal Medicine (Hematology & Oncology)

9055 E DEL CAMINO DR, SUITE 100
SCOTTSDALE, AZ 85258

Maricopa County (480) 860-5000

ARIZONA CENTER FOR HEMATOLOGY AND ONCOLOGY, PLC

Internal Medicine (Hematology & Oncology)

9055 E DEL CAMINO DR, SUITE 100
SCOTTSDALE, AZ 85258

Maricopa County (602) 938-2848

DR. SCOTT P TANNEHILL MD

Radiology (Radiation Oncology)

9055 E DEL CAMINO DR, SUITE 200
SCOTTSDALE, AZ 85258

Maricopa County (480) 922-4600

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 Maggass's NPI number?

The NPI number for Gregory Maggass is 1124093539. It was assigned to this individual provider in the NPPES registry on February 20, 2006.

Where is Gregory Maggass located?

Gregory Maggass practices at 9055 E Del Camino Dr Ste 200, Scottsdale, AZ 85258. The listed phone number is (480) 922-4600.

What is Gregory Maggass's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

Is Gregory Maggass enrolled in Medicare?

Yes. Gregory Maggass 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.

Which organization bills Medicare for Gregory Maggass's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Maggass reassigns Medicare benefits to Arizona Center For Hematology And Oncology, Plc (Scottsdale, AZ). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gregory Maggass's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Maggass accept?

Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Blue Cross Blue Shield of Arizona, Cigna HealthCare of Arizona, Inc and Imperial Insurance Companies, Inc. and 2 other insurers list Gregory Maggass 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 Maggass was last updated on August 9, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.