CYNTHIA S. CHIU, M.D., F.A.C.S., INC.
NPI 1912365115
Ophthalmology in Oakland, CA

Q: What is Cynthia S. Chiu, M.D., F.A.C.S., Inc.'s specialty?

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

Active since February 02, 2016

491 30TH ST, SUITE 201, OAKLAND, CA 94609(510) 836-2122(510) 836-3773 Get Directions Write a Review

NPPES record last updated: February 2, 2016. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Cynthia S. Chiu, M.d., F.a.c.s., Inc. NPPES

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

CYNTHIA S. CHIU, M.D., F.A.C.S., INC. (NPI 1912365115) is a healthcare organization registered as an ophthalmology in Oakland, California and active in the NPI registry since February 2016. The organization lists Cynthia S. Chiu, Owner, as its authorized official.

NPPES Registry Identity

NPI1912365115

Entity TypeOrganization

Primary Taxonomy207W00000X

Legal Business NameCYNTHIA S. CHIU, M.D., F.A.C.S., INC.

Location Address491 30TH ST, SUITE 201Oakland, CA 94609-3235

Mailing Address491 30th St, Suite 201Oakland, CA 94609-3235 · (510) 836-2122 · Fax (510) 836-3773

Phone(510) 836-2122

Fax(510) 836-3773

Organization SubpartNo

Authorized OfficialCynthia S. ChiuOwner · (510) 836-2122

Enumeration DateFebruary 2, 2016

✔ NPI 1912365115 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians

Taxonomy Code207W00000X

License✔ Licensed in CA · A96867

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.

491 30TH ST, Oakland, CA 94609

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Other Identifiers 1

Medicare UPINI14739CA

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)

Cynthia S. Chiu, M.d., F.a.c.s., Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Cynthia S. Chiu, M.D., F.A.C.S., Inc., which bills Medicare for the services this clinician delivers.

Clinician (1)

Cynthia Chiu, M.D.

Ophthalmology

NPI 1306852629

491 30TH ST SUITE 201
Oakland, CA 94609

(510) 836-2122

✔ PECOS✔ Accepts MedicareSame address

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 Cynthia S. Chiu, M.D., F.A.C.S., Inc.'s NPI number?

The NPI number for Cynthia S. Chiu, M.D., F.A.C.S., Inc. is 1912365115. It was assigned to this organization in the NPPES registry on February 2, 2016.

Where is Cynthia S. Chiu, M.D., F.A.C.S., Inc. located?

Cynthia S. Chiu, M.D., F.A.C.S., Inc. is located at 491 30th St Suite 201, Oakland, CA 94609. The listed phone number is (510) 836-2122.

What is Cynthia S. Chiu, M.D., F.A.C.S., Inc.'s specialty?

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

Is Cynthia S. Chiu, M.D., F.A.C.S., Inc. enrolled in Medicare?

Yes. Cynthia S. Chiu, M.D., F.A.C.S., Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Cynthia S. Chiu, M.D., F.A.C.S., Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Ophthalmology) reassigns their Medicare billing to Cynthia S. Chiu, M.D., F.A.C.S., Inc.. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Cynthia S. Chiu, M.D., F.A.C.S., Inc. was last updated on February 2, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.