YEN C. HSIA MD – NPI #1326468661
Ophthalmology

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.

Health Care Provider Taxonomy Code for Ophthalmology

YEN HSIA is an ophthalmologist located in WALNUT CREEK, CA. NPPES has assigned the NPI number 1326468661 to YEN HSIA on April 25, 2014. It is a Type-1 NPI, indicating this NPI number is associated with an individual. He is also known by his other name JOEY HSIA. The primary taxonomy selected by this provider is 207W00000X from the Health Care Provider Taxonomy code set, which is classified as Ophthalmology.

The NPI profile was last updated on Jan 14, 2026. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for YEN HSIA below.

NPI Profile for
YEN C. HSIA

NPI Number
1326468661
Enumeration Date

(more than 12 years ago)
Entity Type
Type-1  Individual (Male)
Legal Name
YEN C. HSIA
Other Name: JOEY HSIA
Credentials
MD
Primary location
350 N WIGET LN STE 200
WALNUT CREEK, CA 94598-2448
Phone: (925) 934-7800 Fax:
1 Other location(s):
400 Parnassus Ave
San Francisco, CA 94143-2202
Phone: (415) 476-1000
Mailing address
Same as primary location
Sole Proprietor
No
Updated
Certification Date
Jan 14, 2026

Note: NPPES allows providers to attest to the accuracy of their NPI data. When a provider request any change to the NPI record, they will be able to attest to their changed NPI data, resulting in an updated certification date.

Taxonomy Code(s)

A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.

Taxonomy Classification / Specialization State License
207W00000X
- Ophthalmology (Primary)		 CA A133168

The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.

Additional Information

Education
CLEVELAND CLINIC LERNER COLLEGE OF MEDICINE OF CASE WESTERN RESERVE UNIVERSITY - Graduated 2013
Accepts Medicare
This provider accepts Medicare-approved amount as payment in full. The Medicare-approved amount is the total the provider can be paid. When a provider accepts the Medicare-approved amount as payment, you won't be billed for more than the Medicare deductible & coinsureance.
Medicare Ordering & Referring
Provider can:
  • Refer to Part B
  • Order Durable Medical Equipment
  • Refer to Home Health Agency
  • Order Power Mobility Devices
Affiliations
YEN HSIA is affiliated with the following medical group(s):
  • HOSPITAL
    • JOHN MUIR MEDICAL CENTER - WALNUT CREEK CAMPUS
      1601 YGNACIO VALLEY RD
      WALNUT CREEK, CA 94598

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