Clifford Karl Chang, O.D.
Optometrist · San Francisco, CA
Clifford Karl Chang, O.D. is an optometrist with a practice address in San Francisco, California, and NPI 1558539007, issued on Feb 19, 2008. Check the license (California 4031, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Clifford Karl Chang
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 4031 CA
Self-reported in NPPES; status is on the state search - Practice location
- 929 Clay St, San Francisco, CA 94108
- Phone
- (415) 982-1700
- Enumerated
- Feb 19, 2008
- Record last updated
- Apr 23, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (415) 982-1750
- Entity
- Type 1 · individual
Also registered at 929 Clay St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mai-Sie Chan, MDInternal Medicine Physician1326136557
- Clifford Chew, MDOtolaryngology Physician1215036066
- Raymond Fay, MDUrology Physician1003808338
- Gustin Ho, M.D.Internal Medicine Physician1437189966
- Wenwu Jin, M.D., PH.D.Urology Physician1003051780
- Chuk Kwan, M.D.Internal Medicine Physician1336101500
Verify Clifford Karl Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 4031Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Optometrist providers in California
There are 8,308 optometrist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other optometrist records in California
- Douglas Aaseby, O.D.El Dorado Hills, CA1962715961
- Saloumeh Abadi, ODSanta Monica, CA1699258756
- Davoud AbbasiFillmore, CA1902361678
- Christopher Abbott, O.D.Santee, CA1417936220
- Sara Abboud, ODAlbany, CA1649052846
- Ghezal Abdali, O.D.Tustin, CA1770688640
- Nahid Abdali, O.D.San Ramon, CA1700210242
- Yasmeen AbdelfattahIrvine, CA1417786617
- Marina Abdou, ODUpland, CA1356017321
- Angela Abe, OPTModesto, CA1336108885
Common questions
What is Clifford Karl Chang, O.D.'s NPI number?
Clifford Karl Chang, O.D.'s National Provider Identifier (NPI) is 1558539007, issued on Feb 19, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Clifford Karl Chang, O.D. located?
The NPPES record lists a practice address at 929 Clay St, San Francisco, CA, 94108. Phone: (415) 982-1700. Providers update this record themselves, so call before visiting.
How can I verify Clifford Karl Chang, O.D.'s license?
NPPES lists California license number 4031, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.