Chee Hian Tan, M.D., PH.D.
Ophthalmology Physician · Pasadena, CA
Chee Hian Tan, M.D., PH.D. is an ophthalmology physician with a practice address in Pasadena, California, and NPI 1346263357, issued on Jul 25, 2006. Check the license (California A111014, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chee Hian Tan
- Credential
- M.D., PH.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- A111014 CA
Self-reported in NPPES; status is on the state search - Practice location
- 625 S Fair Oaks Ave, Pasadena, CA 91105
- Phone
- (626) 817-4747
- Enumerated
- Jul 25, 2006
- Record last updated
- Jan 16, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (626) 817-4748
- Medicare enrollment
- Enrolled (PECOS I20100326000699); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 625 S Fair Oaks Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Norman Chien, MDGeriatric Medicine (Internal Medicine) Physician1184696999
- Jennifer Chronis, M.D.Family Medicine Physician1598297954
Verify Chee Hian Tan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A111014Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% more Medicare Part D claims than the average ophthalmology physician in 2024
1,568 Medicare Part D claims for 303 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 36% of claims.
Most prescribed
- Latanoprost550 claims
- Dorzolamide-Timolol164 claims
- Prednisolone Acetate157 claims
- Ofloxacin127 claims
- Diclofenac Sodium122 claims
- Timolol Maleate116 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 75.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $22.06
1 payment: food and beverage; the largest payer was Alcon Vision LLC. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Richard H. Yook, M.D, Inc.Northridge, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chee Hian Tan among 2,899 ophthalmology physician records in California
Chee Hian Tan, M.D., PH.D. is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 45% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1993 · median 2001 among the 1,907 with a school on file
- Record last updated2015 · 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 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in Pasadena → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Rizwan Bhatti, M.D.Pasadena, CA 911051588724108
- Gerald Bowns, MDPasadena, CA 911051225000672
- Joseph Davidson, M.D.Pasadena, CA 911051467487926
- Jeffrey Hong, MDPasadena, CA 911051922049055
- Hugo Hsu, MDPasadena, CA 911051336153816
- Michael Ip, MDPasadena, CA 911051982670402
- John Irvine, M.D.Pasadena, CA 911051316009103
- Marta Mora, M.D.Pasadena, CA 911051093766651
Common questions
What is Chee Hian Tan, M.D., PH.D.'s NPI number?
Chee Hian Tan, M.D., PH.D.'s National Provider Identifier (NPI) is 1346263357, issued on Jul 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Chee Hian Tan, M.D., PH.D. located?
The NPPES record lists a practice address at 625 S Fair Oaks Ave, Pasadena, CA, 91105. Phone: (626) 817-4747. Providers update this record themselves, so call before visiting.
How can I verify Chee Hian Tan, M.D., PH.D.'s license?
NPPES lists California license number A111014, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Chee Hian Tan, M.D., PH.D. prescribe under Medicare Part D?
In 2024, Chee Hian Tan, M.D., PH.D. had 1,568 Medicare Part D claims for 303 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Chee Hian Tan, M.D., PH.D.'s MIPS final score?
The 2023 MIPS final score is 75.9 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.