NPPES file of Aug 9, 2026

Victor Siew, M.D.

Geriatric Medicine (Internal Medicine) Physician · Fountain Valley, CA

Victor Siew, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Fountain Valley, California, and NPI 1164515003, issued on Oct 2, 2006. Check the license (California G32104, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1164515003
Name
Victor Siew
Credential
M.D.
Primary taxonomy
Geriatric Medicine (Internal Medicine) Physician 207RG0300X
License number
G32104 CA
Self-reported in NPPES; status is on the state search
Practice location
17220 Newhope St, Fountain Valley, CA 92708
Phone
(714) 435-0600
Enumerated
Oct 2, 2006
Record last updated
Nov 10, 2010 (not updated in 16 years: call before relying on the address or phone)
Fax
(714) 435-1030
Medicaid ID
G32104 CA
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest geriatric medicine (internal medicine) physician records → All 532 in California → Look up another NPI →

Also registered at 17220 Newhope St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Andrew Kim, DDSGeneral Practice Dentistry1073843660
  2. Kelly Lin, L.M.F.T.Marriage & Family Therapist1871902239
  3. Kaitlyn Nguyen, P.A.C.Medical Physician Assistant1043590250
  4. Philip Nisco, DDSOrthodontics and Dentofacial Orthopedics Dentistry1801019443
  5. Duke Phan, MDNeurology Physician1437352630
  6. Elisha Van Deusen, D.C.Chiropractor1265445837

Verify Victor Siew in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G32104    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Victor Siew among 532 geriatric medicine (internal medicine) physician records in California

Victor Siew, M.D. is one of 532 geriatric medicine (internal medicine) physician records with a practice address in California. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 7% of them.

  • NPI issued2006 · 7% of these records are older, 46% newer
  • In a Medicare fileNo · 77% of these records are
  • In the CMS Doctors and Clinicians fileNo · 51% of these records are
  • Record last updated2010 · 62% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Geriatric Medicine (Internal Medicine) Physician providers in California

There are 532 geriatric medicine (internal medicine) physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 532 in California → Every provider in Fountain Valley → Geriatric Medicine (Internal Medicine) Physician nationwide →

The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes

  1. Richard Wong, M.D.Fountain Valley, CA 927081659416436
  2. Christopher Nguyen, MDMission Viejo, CA 926911588624100
  3. Dat Duong, M.D.Westminster, CA 926831689740912
  4. Robert Feldman, M.D.Laguna Hills, CA 926531194805416
  5. Patricia Gifford, MDLaguna Hills, CA 926531487725552
  6. Suhail Hawit, MDLaguna Hills, CA 926531538229224
  7. Sarah Teymoorian, M.D.Laguna Hills, CA 926531518147396
  8. John Homan, MDHuntington Beach, CA 926461437116142

Common questions

What is Victor Siew, M.D.'s NPI number?

Victor Siew, M.D.'s National Provider Identifier (NPI) is 1164515003, issued on Oct 2, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Victor Siew, M.D. located?

The NPPES record lists a practice address at 17220 Newhope St, Fountain Valley, CA, 92708. Phone: (714) 435-0600. Providers update this record themselves, so call before visiting.

How can I verify Victor Siew, M.D.'s license?

NPPES lists California license number G32104, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.