OrganizationActive
Clifford Karl Chang OD Inc.
NPI 1558536482 · Optometrist · San Francisco, CA
Clifford Karl Chang OD Inc. is a Optometrist organization in San Francisco, CA (NPI 1558536482).
Provider details
- NPI number
- 1558536482
- Entity type
- Organization
- Primary specialty
- OptometristEye and Vision Services Providers
- Organization subpart
- No
- Authorized official
- Bradford Chang, Optometrist(415) 982-1700
- License
- 4071 (CA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
Detailed profile(87/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
929 Clay St
203
San Francisco, CA 94108-1556
Phone: (415) 982-1700
Fax: (415) 982-1750
Street-level locationGet directions
Mailing address
929 Clay St
San Francisco, CA 94108-1556
Registry dates
- Enumerated
- 2008-04-22
- Last updated
- 2023-02-15
- Certified
- 2023-02-15
Frequently asked questions
- What is Clifford Karl Chang OD Inc.'s NPI number?
- Clifford Karl Chang OD Inc.'s National Provider Identifier (NPI) is 1558536482, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Clifford Karl Chang OD Inc.?
- Clifford Karl Chang OD Inc. is classified in the NPPES registry as Optometrist (Eye and Vision Services Providers).
- Where is Clifford Karl Chang OD Inc. located?
- Clifford Karl Chang OD Inc.'s practice location on file with NPPES is 929 Clay St, San Francisco, CA 94108-1556.
- What is Clifford Karl Chang OD Inc.'s phone number?
- The practice phone number listed in the NPPES registry for Clifford Karl Chang OD Inc. is (415) 982-1700.
- Who is the authorized official for Clifford Karl Chang OD Inc.?
- The authorized official listed on Clifford Karl Chang OD Inc.'s NPPES record is Bradford Chang, Optometrist. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Clifford Karl Chang OD Inc.'s NPI active?
- Yes — Clifford Karl Chang OD Inc.'s NPI (1558536482) is active in the NPPES registry as of the last update on 2023-02-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.