Ellen Chang, O.D.
NPI 1699925420 · Optometrist · Yonkers, NY
Ellen Chang, O.D. is a Optometrist provider in Yonkers, NY (NPI 1699925420).
Provider details
- NPI number
- 1699925420
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Female
- Sole proprietor
- No
- License
- T13619 (CA)
Specialties & taxonomies
Eye and Vision Services Providers
Eye and Vision Services Providers
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-09-29
- Last updated
- 2010-05-07
Frequently asked questions
- What is Ellen Chang's NPI number?
- Ellen Chang's National Provider Identifier (NPI) is 1699925420, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ellen Chang's specialty?
- Ellen Chang is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Ellen Chang located?
- Ellen Chang's practice location on file with NPPES is 5570 Xavier Dr, Yonkers, NY 10704-1322.
- What is Ellen Chang's phone number?
- The practice phone number listed in the NPPES registry for Ellen Chang is (914) 962-6600.
- Is Ellen Chang's NPI active?
- Yes — Ellen Chang's NPI (1699925420) is active in the NPPES registry as of the last update on 2010-05-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.