ELLIN YING-CHUN WU O.D.
NPI 1063660660
Optometrist - Corneal and Contact Management in Sunnyvale, CA

Q: What is Ellin Wu's NPI number?

The NPI number for Ellin Wu is 1063660660. It was assigned to this individual provider in the NPPES registry on September 8, 2008. The provider is also known as Ying-Chun Ellin Chen O.D..

Q: What is Ellin Wu's specialty?

The primary specialty registered for this NPI is Optometrist, specializing in Corneal and Contact Management, with taxonomy code 152WC0802X.

Q: When was this NPI record last updated?

The NPPES record for Ellin Wu was last updated on August 30, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.

Active since September 08, 2008PECOS EnrolledAccepts Medicare Assignment

1085 W EL CAMINO REAL, SUNNYVALE, CA 94087(408) 524-5900(408) 524-5950 Get Directions Write a Review

NPPES record last updated: August 30, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Ellin Ying-chun Wu O.d. NPPES

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

ELLIN YING-CHUN WU O.D. (NPI 1063660660) is an individual corneal and contact management provider in Sunnyvale, California, licensed in California (OPT13544) and active in the NPI registry since September 2008. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of University Of California - School Of Optometry (2008).

NPPES Registry Identity

NPI1063660660

Entity TypeIndividualFemale

Primary Taxonomy152WC0802X

Provider Legal NameELLIN YING-CHUN WUCredential: O.D.

Location Address1085 W EL CAMINO REALSunnyvale, CA 94087-1030

Mailing Address1085 W El Camino RealSunnyvale, CA 94087-1030 · (408) 524-5900 · Fax (408) 524-5950

Phone(408) 524-5900

Fax(408) 524-5950

Sole ProprietorNo

Medical School CMSUniversity Of California - School Of OptometryGraduated 2008

Enumeration DateSeptember 8, 2008

Last NPPES UpdateAugust 30, 2021

NPPES CertifiedAugust 10, 2021

✔ NPI 1063660660 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometrist · Corneal and Contact ManagementEye and Vision Services Providers

Taxonomy Code152WC0802X

License✔ Licensed in CA · OPT13544

Definition

The professional activities performed by an Optometrist related to the fitting of contact lenses to an eye, ongoing evaluation of the cornea's ability to sustain successful contact lens wear, and treatment of any external eye or corneal condition which can affect contact lens wear.

1085 W EL CAMINO REAL, Sunnyvale, CA 94087

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Other Names 1

Former Name (1)Ying-chun Ellin Chen O.d.

Secondary Practice Locations 2

Location 1770 Scott BlvdSanta Clara, CA 95050-6927 · Phone (408) 296-0511 · Fax (408) 296-1647

Location 2130 S Sunnyvale AveSunnyvale, CA 94086 · Phone (408) 736-3802

Other Identifiers 1

MedicaidOPT13544CA

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

Ellin Ying-chun Wu O.d. 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.

PECOS PAC ID3971662438

PECOS Enrollment IDI20081112000783

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 Reassignments

Medicare enrollment records show Ellin Wu reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Silicon Valley Eyecare Optometry And Contact Lenses

2.4 mi

Optometrist

770 SCOTT BLVD
Santa Clara, CA 95050

Reassigned Medicare billing, California enrollment
10 clinicians in this Medicare group

NPI 1477509560 (408) 296-0511

Sutter Bay Medical Foundation

11 mi

Multi-Specialty

795 EL CAMINO REAL
Palo Alto, CA 94301

Reassigned Medicare billing, California enrollment
4,479 clinicians in this Medicare group

NPI 1013950807 (650) 321-4121

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

Areas of Expertise CMS Part B claims 10

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

337 services297 patients

Imaging of optic nerve 92133

Imaging of the optic nerve is a non-invasive procedure that captures detailed pictures of your optic nerve. It helps doctors assess eye health, particularly for conditions like glaucoma. It's painless, quick, and uses safe technology like MRI or OCT (Optical Coherence Tomography).

140 services138 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

115 services99 patients

Photography of the retina 92250

Photography of the retina, also known as retinal imaging, is a non-invasive procedure that captures images of the back of your eye. This helps doctors identify and monitor conditions like glaucoma, macular degeneration, or diabetic retinopathy. It's painless and quick, often part of a routine eye exam.

103 services95 patients

Exam of visual field with extended testing 92083

An extended visual field exam is a detailed test to evaluate your peripheral (side) vision. It helps to detect any potential blind spots which may not be noticeable in daily life. These could be caused by eye diseases like glaucoma, or neurological conditions.

98 services77 patients

Imaging of retina 92134

Imaging of the retina is a non-invasive procedure that captures detailed images of your eye's interior. This helps detect conditions like macular degeneration or retinal detachment. It's painless and takes only a few minutes.

46 services44 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94087 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

$156.67 typical visit price

range $70.37 – $206.04

Typical copayment $39.16 (range $17.59 – $51.51)

Most-billed visit code 99204

Established Patient

$86.56 typical visit price

range $23.96 – $169.60

Typical copayment $21.64 (range $5.99 – $42.40)

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.

WILLIAM PHUNG

Physical Therapist