Ari Katerelos, MD in Tamuning, GU - Medicare Radiation Oncology

Ari Katerelos, MD is a medicare enrolled "Radiology - Radiation Oncology" physician in Tamuning, Guam. He went to University Of California, Geffen School Of Medicine and graduated in 2005 and has 21 years of diverse experience with area of expertise as Radiation Oncology. He is a member of the group practice Proton Doctors Professional Corporation and his current practice location is 633 Gov Carlos Camacho Rd Ste B-1, Tamuning, Guam. You can reach out to his office (for appointments etc.) via phone at (671) 646-3363.

Ari Katerelos is licensed to practice in Guam (license number M-1914) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1861607418.

Contact Information

	Ari Katerelos, MD
	633 Gov Carlos Camacho Rd Ste B-1, Tamuning, GU 96913
	(671) 646-3363
	(671) 646-4873

Map and Direction

Physician's Profile

Full Name	Ari Katerelos
Gender	Male
Speciality	Radiation Oncology
Experience	21 Years
Location	633 Gov Carlos Camacho Rd Ste B-1, Tamuning, Guam
Accepts Medicare Assignments	Yes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.

Medical Education and Training:

Ari Katerelos attended and graduated from University Of California, Geffen School Of Medicine in 2005

NPI Data:

NPI Number: 1861607418
Provider Enumeration Date: 05/14/2007
Last Update Date: 03/04/2026

Medicare PECOS Information:

PECOS PAC ID: 2365636099
Enrollment ID: I20101027000277

Medical Identifiers

Medical identifiers for Ari Katerelos such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1861607418	NPI	-	NPPES

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
2085R0001X	Radiology - Radiation Oncology	M-1914 (Guam)	Primary
2085R0001X	Radiology - Radiation Oncology	A99003 (California)	Secondary

Group Practice Association

Group Practice Name	Group PECOS PAC ID	No. of Members
Proton Doctors Professional Corporation	7214202936	12

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Ari Katerelos allows following entities to bill medicare on his behalf.

Entity Name	Advanced Radiation Oncology Medical Group Inc
Entity Type	Part B Supplier - Radiation Therapy Center
Entity Identifiers	NPI Number: 1720266075 PECOS PAC ID: 6305906942 Enrollment ID: O20081128000050

Entity Name	City Of Hope Medical Foundation
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1871886366 PECOS PAC ID: 3779751656 Enrollment ID: O20110720000244

Entity Name	Proton Doctors Professional Corporation
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1093240285 PECOS PAC ID: 7214202936 Enrollment ID: O20171005003071

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Ari Katerelos is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing Address	Practice Location Address
Ari Katerelos, MD 633 Gov Carlos Camacho Rd, Suite B1, Tamuning, GU 96913 Ph: () -	Ari Katerelos, MD 633 Gov Carlos Camacho Rd Ste B-1, Tamuning, GU 96913 Ph: (671) 646-3363

Reviews and Comments

Radiology Doctors in Tamuning, GU

Michael Edwin Fenton, MD Radiology Medicare: Accepting Medicare Assignments Practice Location: 643 Chalan San Antonio Ste 109, Tamuning, GU 96913 Phone: 671-648-6390
Eric William Spak, MD Radiology Medicare: Accepting Medicare Assignments Practice Location: 301 Frank H Cushing Way # 3a, Tamuning, GU 96913 Phone: 671-687-6544
Dr. Laura Taylor, M.D. Radiology Medicare: Accepting Medicare Assignments Practice Location: 633 Carols Camacho Rd, Suite 210, Tamuning, GU 96913 Phone: 671-646-1001
Eythor Bjorgvinsson, M.D. Radiology Medicare: Not Enrolled in Medicare Practice Location: 633 Gov. Carlos Camacho Rd, Ste 210 Guam Medical Plaza, Tamuning, GU 96913 Phone: 671-649-1001 Fax: 671-649-1002
Dr. Peachy Mae Tadifa Piana-pacheco, M.D. Radiology Medicare: Accepting Medicare Assignments Practice Location: 633 Gov Carlos Camacho Road Suite 210, Tamuning, GU 96913 Phone: 671-649-1001 Fax: 671-649-1002
Nathaniel Benjamin Berg, MD Radiology Medicare: Accepting Medicare Assignments Practice Location: 633 Governor Carlos Camacho Road, Suite 210, Tamuning, GU 96913 Phone: 671-649-1001 Fax: 671-649-1002
Dr. Sonita Chuo Tem, MD Radiology Medicare: Accepting Medicare Assignments Practice Location: 633 Gov Carlos G Camacho Rd, Tamuning, GU 96913 Phone: 419-699-0508

Ari Katerelos, MD - Medicare Radiation Oncology in Tamuning, GU