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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

NANCY CHAN O.D.
NPI 1275966152
Optometrist in San Francisco, CA

Active since August 15, 2013PECOS Enrolled
1600 OWENS STREET, 3RD FLOOR, SAN FRANCISCO, CA 94158(415) 833-5665(901) 722-3347 Get Directions Write a Review

NPPES record last updated: October 9, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 9, 2026, Jan 3, 2022 (2 updates tracked since 2022).

About Nancy Chan O.d. NPPES

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

NANCY CHAN O.D. (NPI 1275966152) is an individual optometrist in San Francisco, California, licensed in California (14624TLG) and active in the NPI registry since August 2013. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1275966152
Entity TypeIndividualFemale
Primary Taxonomy152W00000X
Provider Legal NameNANCY CHANCredential: O.D.
Location Address1600 OWENS STREET, 3RD FLOORSan Francisco, CA 94158
Mailing Address300 Westgate DriveSan Francisco, CA 94127 · (901) 722-3250 · Fax (901) 722-3347
Phone(415) 833-5665
Fax(901) 722-3347
Sole ProprietorNo
Enumeration DateAugust 15, 2013
Last NPPES UpdateOctober 9, 20262 updates tracked since enumeration
✔ NPI 1275966152 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers
Taxonomy Code152W00000X
Licenses✔ Licensed in CA · 14624TLG✔ Licensed in TN · 3095
Definition
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.
1600 OWENS STREET, 3RD FLOOR, San Francisco, CA 94158
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Nancy Chan O.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.

Medicare Billing Reassignment

Medicare enrollment records show Nancy Chan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
2.7 mi
Internal Medicine
2238 GEARY
San Francisco, CA 94116
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1841373800 (415) 833-2200

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94158 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.

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 Nancy Chan's NPI number?

The NPI number for Nancy Chan is 1275966152. It was assigned to this individual provider in the NPPES registry on August 15, 2013.

Where is Nancy Chan located?

Nancy Chan practices at 1600 Owens Street, 3rd Floor, San Francisco, CA 94158. The listed phone number is (415) 833-5665.

What is Nancy Chan's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Is Nancy Chan enrolled in Medicare?

Yes. Nancy Chan is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Nancy Chan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nancy Chan reassigns Medicare benefits to Permanente Medical Group Inc (San Francisco, CA). The 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 Nancy Chan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Nancy Chan was last updated on October 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 days 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.