Michael Chang, OD
NPI 1811792435 · Optometrist · San Francisco, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Chang, OD is a Optometrist provider in San Francisco, CA (NPI 1811792435).
Provider details
- NPI number
- 1811792435
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Male
- Sole proprietor
- Yes
- License
- OPT35749 (CA)
Specialties & taxonomies
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
1 yr 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
- 2025-02-18
- Last updated
- 2025-08-15
- Certified
- 2025-08-13
Frequently asked questions
- What is Michael Chang's NPI number?
- Michael Chang's National Provider Identifier (NPI) is 1811792435, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Chang's specialty?
- Michael Chang is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Michael Chang located?
- Michael Chang's practice location on file with NPPES is 490 Illinois St, San Francisco, CA 94158.
- What is Michael Chang's phone number?
- The practice phone number listed in the NPPES registry for Michael Chang is (415) 353-2800.
- Does Michael Chang accept Medicare?
- Michael Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Chang's NPI active?
- Yes — Michael Chang's NPI (1811792435) is active in the NPPES registry as of the last update on 2025-08-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.