Calvin Tan, O.D.
Optometrist · Pasadena, CA
Calvin Tan, O.D. is an optometrist with a practice address in Pasadena, California, and NPI 1043507643, issued on Jul 3, 2011. Check the license (California 14313TLG, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Calvin Tan
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 14313TLG CA
Self-reported in NPPES; status is on the state search - Practice location
- 477 E Colorado Blvd, Pasadena, CA 91101
- Phone
- (626) 796-1191
- Enumerated
- Jul 3, 2011
- Record last updated
- Oct 24, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (626) 796-0189
- Medicare enrollment
- Enrolled (PECOS I20120612000616); accepts Medicare assignment
- Medical or professional school
- State University Of New York - State College Optometry, 2011
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Also registered at 477 E Colorado Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Angineh Almasi, O.D.Optometrist1760788632
- Barbara Armstrong, ODOptometrist1023120367
- Daniela BaumannOptometrist1982232146
- Christie Chan, ODOptometrist1669584900
- Vivien Chan, ODOptometrist1679685911
- Jessica Chang, ODOptometrist1063524304
Verify Calvin Tan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 14313TLGCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average optometrist in 2024
58 Medicare Part D claims for 19 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 53% of claims.
Most prescribed
- Cyclosporine29 claims
- Latanoprost23 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupGardena, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Calvin Tan among 8,308 optometrist records in California
Calvin Tan, O.D. is one of 8,308 optometrist records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 61% of them.
- NPI issued2011 · 61% of these records are older, 36% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2011 · median 2008 among the 3,573 with a school on file
- Record last updated2021 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
90 optometrist records list a practice address in Pasadena
They are 90 of the 10,525 NPPES records with a practice address in Pasadena, and 8,308 optometrist records in California.
All 8,308 in California → Every provider in Pasadena → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Barbara Armstrong, ODPasadena, CA 911011023120367
- Vivien Chan, ODPasadena, CA 911011679685911
- Christie Chan, ODPasadena, CA 911011669584900
- Jessica Chang, ODPasadena, CA 911011063524304
- Andrew Gore, O.D.Pasadena, CA 911011376513259
- Brenda Lien, ODPasadena, CA 911011285746420
- Tracy Mayo, ODPasadena, CA 911011497867733
- Barnett Parks, ODPasadena, CA 911011447362686
Common questions
What is Calvin Tan, O.D.'s NPI number?
Calvin Tan, O.D.'s National Provider Identifier (NPI) is 1043507643, issued on Jul 3, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Calvin Tan, O.D. located?
The NPPES record lists a practice address at 477 E Colorado Blvd, Pasadena, CA, 91101. Phone: (626) 796-1191. Providers update this record themselves, so call before visiting.
How can I verify Calvin Tan, O.D.'s license?
NPPES lists California license number 14313TLG, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Calvin Tan, O.D. prescribe under Medicare Part D?
In 2024, Calvin Tan, O.D. had 58 Medicare Part D claims for 19 beneficiaries; the average among optometrist prescribers was 277. Part D covers Medicare prescriptions 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. Medicare files from data.cms.gov. 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.