Dr Ari Katerelos, MD - Medicare Radiation Oncology in San Bernardino, CA

Dr Ari Katerelos, MD is a medicare enrolled "Radiology - Radiation Oncology" physician in San Bernardino, California. He went to University Of California, Geffen School Of Medicine and graduated in 2005 and has 19 years of diverse experience with area of expertise as Radiation Oncology. He is a member of the group practice Proton Doctors Professional Corporation, Guam Healthcare Development Incorporated and his current practice location is 401 E Highland Ave Ste D, San Bernardino, California. You can reach out to his office (for appointments etc.) via phone at (909) 475-2700.

Dr Ari Katerelos is licensed to practice in California (license number A99003) 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

Dr Ari Katerelos, MD
401 E Highland Ave Ste D,
San Bernardino, CA 92404-3800
(909) 475-2700
(909) 475-2738

Map and Direction




Physician's Profile

Full NameDr Ari Katerelos
GenderMale
SpecialityRadiation Oncology
Experience19 Years
Location401 E Highland Ave Ste D, San Bernardino, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr 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: 01/24/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 2365636099
  • Enrollment ID: I20101027000277

Medical Identifiers

Medical identifiers for Dr Ari Katerelos such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1861607418NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
2085R0001XRadiology - Radiation Oncology M-1914 (Guam)Secondary
2085R0001XRadiology - Radiation Oncology A99003 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Guam Regional Medical CityDededo, GUHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Proton Doctors Professional Corporation721420293610
Guam Healthcare Development Incorporated9234351776124

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. Dr Ari Katerelos allows following entities to bill medicare on his behalf.
Entity NameAdvanced Radiation Oncology Medical Group Inc
Entity TypePart B Supplier - Radiation Therapy Center
Entity IdentifiersNPI Number: 1720266075
PECOS PAC ID: 6305906942
Enrollment ID: O20081128000050
Entity NameCity Of Hope Medical Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1871886366
PECOS PAC ID: 3779751656
Enrollment ID: O20110720000244
Entity NameProton Doctors Professional Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI 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. Dr 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 AddressPractice Location Address
Dr Ari Katerelos, MD
Po Box 512185,
Los Angeles, CA 90051-0185

Ph: () -
Dr Ari Katerelos, MD
401 E Highland Ave Ste D,
San Bernardino, CA 92404-3800

Ph: (909) 475-2700

Reviews and Comments


Radiology Doctors in San Bernardino, CA

Dr. Tammam Beydoun, D.O.
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Adam Coen, M.D.
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Dr. William Claude Buss, MD
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Dr. Munther E Alqaisi, M.D.
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Dr. Narayana G Memula, M.D.
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Practice Location: 1800 Medical Center Dr, Suite 100, San Bernardino, CA 92411
Phone: 909-887-8800    Fax: 909-887-5678

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

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