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MEMORIAL RADIATION ONCOLOGY MEDICAL
NPI 1639509706
Radiology - Radiation Oncology in Fountain Valley, CA

Active since November 26, 2013
18111 BROOKHURST ST, SUITE LL0300, FOUNTAIN VALLEY, CA 92708(714) 962-7100(714) 963-7600 Get Directions Write a Review

NPPES record last updated: October 15, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Feb 22, 2023, Feb 14, 2023, Mar 9, 2020 (3 updates tracked since 2020).

About Memorial Radiation Oncology Medical NPPES

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

MEMORIAL RADIATION ONCOLOGY MEDICAL (NPI 1639509706) is a healthcare organization registered as a radiation oncology in Fountain Valley, California and active in the NPI registry since November 2013. The organization lists Asif R. Harsolia, Md/authorized Official, as its authorized official.

NPPES Registry Identity

NPI1639509706
Entity TypeOrganization
Primary Taxonomy2085R0001X
Legal Business NameMEMORIAL RADIATION ONCOLOGY MEDICAL
Location Address18111 BROOKHURST ST, SUITE LL0300Fountain Valley, CA 92708-6728
Mailing AddressPo Box 844945Los Angeles, CA 90084-4945 · (562) 492-6695 · Fax (562) 988-0389
Phone(714) 962-7100
Fax(714) 963-7600
Organization SubpartNo
Authorized OfficialAsif R. HarsoliaMd/authorized Official · (562) 492-6695
Enumeration DateNovember 26, 2013
Last NPPES UpdateOctober 15, 20253 updates tracked since enumeration
NPPES CertifiedOctober 15, 2025
✔ NPI 1639509706 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Radiation OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0001X
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.
18111 BROOKHURST ST, Fountain Valley, CA 92708
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Memorial Radiation Oncology Medical is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

5

Medicare enrollment records show 5 clinicians reassign Medicare billing to Memorial Radiation Oncology Medical, which bills Medicare for the services they deliver. Of these, 2 practice at this address. They are listed nearest first.

Clinicians, nearest first (5)

Asif Harsolia, M.D.
Radiation Oncology
NPI 1376565374
18111 BROOKHURST ST STE 0300
Fountain Valley, CA 92708
(714) 962-7100
✔ PECOS✔ Accepts MedicareSame address
Peyman Kabolizadeh
Radiation Oncology
NPI 1093941171
18111 BROOKHURST ST STE LL0300
Fountain Valley, CA 92708
(714) 962-7100
✔ PECOS✔ Accepts MedicareSame address
Randy Wei, M.D., PH.D.
Radiation Oncology
NPI 1790045714
5901 E 7TH ST
Long Beach, CA 90822
(714) 962-7100
✔ PECOS✔ Accepts Medicare11 mi
Alam Syed, M.D.
Radiation Oncology
NPI 1316956279
2801N. ATLANTIC AVENUE
Long Beach, CA 90801
(562) 933-0300
✔ PECOS✔ Accepts Medicare15 mi
Christine Yang
Radiation Oncology
NPI 1699351288
2801 ATLANTIC AVE
Long Beach, CA 90806
(562) 933-0300
✔ PECOS15 mi

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

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 Memorial Radiation Oncology Medical's NPI number?

The NPI number for Memorial Radiation Oncology Medical is 1639509706. It was assigned to this organization in the NPPES registry on November 26, 2013.

Where is Memorial Radiation Oncology Medical located?

Memorial Radiation Oncology Medical is located at 18111 Brookhurst St Suite Ll0300, Fountain Valley, CA 92708. The listed phone number is (714) 962-7100.

What is Memorial Radiation Oncology Medical's specialty?

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

Is Memorial Radiation Oncology Medical enrolled in Medicare?

Yes. Memorial Radiation Oncology Medical is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Memorial Radiation Oncology Medical?

According to the CMS Revalidation Reassignment List (October 2026 release), 5 clinicians, all in Radiation Oncology, reassign their Medicare billing to Memorial Radiation Oncology Medical. A 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 the clinician's services. Of these, 2 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Memorial Radiation Oncology Medical was last updated on October 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months 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.