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ANDREW SYDNEY WILLIAMS M.D.
NPI 1528075389
Ophthalmology in San Mateo, CA

Active since August 02, 2006PECOS Enrolled
101 S SAN MATEO DR, STE 306, SAN MATEO, CA 94401(650) 696-7070(650) 348-1314 Get Directions Write a Review

NPPES record last updated: March 7, 2019. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Andrew Sydney Williams M.d. NPPES

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

ANDREW SYDNEY WILLIAMS M.D. (NPI 1528075389) is an individual ophthalmology provider in San Mateo, California, licensed in California (G56863) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1528075389
Entity TypeIndividualMale
Primary Taxonomy207W00000X
Provider Legal NameANDREW SYDNEY WILLIAMSCredential: M.D.
Location Address101 S SAN MATEO DR, STE 306San Mateo, CA 94401-3844
Mailing Address101 S San Mateo Dr, Ste 306San Mateo, CA 94401-3844 · (415) 431-9555
Phone(650) 696-7070
Fax(650) 348-1314
Sole ProprietorYes
Enumeration DateAugust 2, 2006
Last NPPES UpdateMarch 7, 2019
✔ NPI 1528075389 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians
Taxonomy Code207W00000X
License✔ Licensed in CA · G56863
Definition
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
101 S SAN MATEO DR, San Mateo, CA 94401
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Andrew Sydney Williams M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94401 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ALLA SRAGETS M.D.
Obstetrics & Gynecology
101 S SAN MATEO DR, SUITE 112
SAN MATEO, CA 94401
San Mateo County (650) 344-7799
SAN MATEO RHEUMATOLOGY INC.
Internal Medicine (Rheumatology)
101 S SAN MATEO DR, SUITE 307
SAN MATEO, CA 94401
San Mateo County (650) 348-6011
DR. WILLIAM REEVES TATOMER MD
Psychiatry & Neurology (Psychiatry)
101 S SAN MATEO DR, SUITE 300
SAN MATEO, CA 94401
San Mateo County (650) 342-4442
DR. ROMMEL HINDOCHA D.C.
Chiropractor
101 S SAN MATEO DR, SUITE 200
SAN MATEO, CA 94401
San Mateo County (650) 347-2225
DALE JACKNOW
Pediatrics (Developmental - Behavioral Pediatrics)
101 S SAN MATEO DR, SUITE 208
SAN MATEO, CA 94401
San Mateo County (650) 342-3137
DR. CATRINA PATRICIA BLAKE FNP
Nurse Practitioner
101 S SAN MATEO DR
SAN MATEO, CA 94401
San Mateo County (650) 755-6400
DR. DALE JOSEPH RITZO M.D.
Internal Medicine
101 S SAN MATEO DR, SUITE 206
SAN MATEO, CA 94401
San Mateo County (650) 343-4003
AARON KWAN O.D.
Optometrist
101 S SAN MATEO DR, SUITE 310
SAN MATEO, CA 94401
San Mateo County (408) 807-8540

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 Andrew Williams's NPI number?

The NPI number for Andrew Williams is 1528075389. It was assigned to this individual provider in the NPPES registry on August 2, 2006.

Where is Andrew Williams located?

Andrew Williams practices at 101 S San Mateo Dr Ste 306, San Mateo, CA 94401. The listed phone number is (650) 696-7070.

What is Andrew Williams's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is Andrew Williams enrolled in Medicare?

Yes. Andrew Williams is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Andrew Williams was last updated on March 7, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years 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.