XIAOYAN Y. ZHANG MD
NPI 1891873402
Ophthalmology in San Francisco, CA
About Xiaoyan Y. Zhang Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
XIAOYAN Y. ZHANG MD (NPI 1891873402) is an individual ophthalmology provider in San Francisco, California, licensed in California (A66946) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1984).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Xiaoyan Y. Zhang Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Xiaoyan Zhang reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Burlingame, CA 94010
- Reassigned Medicare billing, California enrollment
- 18 clinicians in this Medicare group
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 94115 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
SAN FRANCISCO, CA 94115
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 Xiaoyan Zhang's NPI number?
The NPI number for Xiaoyan Zhang is 1891873402. It was assigned to this individual provider in the NPPES registry on November 1, 2006.
Where is Xiaoyan Zhang located?
Xiaoyan Zhang practices at 2200 Ofarrell St, San Francisco, CA 94115. The listed phone number is (415) 833-2000.
What is Xiaoyan Zhang's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is Xiaoyan Zhang enrolled in Medicare?
Yes. Xiaoyan Zhang is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Xiaoyan Zhang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Xiaoyan Zhang reassigns Medicare benefits to Peninsula Ophthalmology Group, Inc. (Burlingame, 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 Xiaoyan Zhang'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 Xiaoyan Zhang was last updated on December 22, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Xiaoyan Y. Zhang, MD · NPI 1891873402
Ophthalmology physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since November 1, 2006.
## Identity
- **NPI:** 1891873402 (Entity type: Individual)
- **Enumerated:** November 1, 2006
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** A66946 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2200 OFARRELL ST, San Francisco, CA 94115-3357
- **Phone:** (415) 833-2000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Peninsula Ophthalmology Group, Inc. (NPI 1447303995, Burlingame, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1984
## Record status
- **NPPES last updated:** December 22, 2021
- **Other identifiers:** Medicaid 00A669460 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1891873402) · Data from the CMS NPPES public registry.