Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Liam Ghiam, MD, MS

Individual provider Radiation Oncology Physician · NPI 1689123879

Dr. Liam Ghiam, MD, MS is a Radiation Oncology in Los Alamitos, California. Qualified in 2003, 23 years ago. Practices with Uc Regents Department of Radiation Oncology, a 17-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
23
Licensed in
CA
In the registry since
2016
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
MS — Master of Science
A graduate science degree.

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Practice location Address checks out

3951 Katella Ave Ste 102
Los Alamitos, CA 90720-3303
Phone: (562) 799-3198
Fax: (562) 799-3509
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence A165739 (CA)

Record details

NPI number1689123879
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , MS
Sole proprietorNo
NPI enumeratedSeptember 28, 2016
Last updated in NPPESJuly 10, 2025
Certification dateJuly 10, 2025
Mailing address3951 Katella Ave Ste 102, Los Alamitos, CA 90720-3303

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyRADIATION ONCOLOGY
Medical schoolOTHER
Graduated 2003 (23 years in practice)
Group practice Uc Regents Department Of Radiation Oncology — 17 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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