Sidney Tan Chang, MD
Ophthalmology Physician · San Diego, CA
Sidney Tan Chang, MD is an ophthalmology physician with a practice address in San Diego, California, and NPI 1790888006, issued on Sep 6, 2006. Check the license (California A125489, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sidney Tan Chang
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License numbers
- A125489 CA
MD-15590 HI
D74915 MD
2008017344 MO
Self-reported in NPPES; status is on the state search - Practice location
- 200 W Arbor Dr, San Diego, CA 92103
- Phone
- (858) 534-6290
- Enumerated
- Sep 6, 2006
- Record last updated
- Jul 16, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20130315000270); accepts Medicare assignment
- Medical or professional school
- Js Weill Medical College, Cornell University, 2004
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 200 W Arbor Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Geraldine Abcede, RNCertified Registered Nurse Anesthetist1982384046
- Joseph Abdelmalek, M.DNephrology Physician1740485531
- Kristy AbelCertified Registered Nurse Anesthetist1962113035
- Paula Abeleda, NPFamily Nurse Practitioner1558945022
Verify Sidney Tan Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A125489Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% more Medicare Part D claims than the average ophthalmology physician in 2024
2,209 Medicare Part D claims for 635 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D.
Most prescribed
- Prednisolone Acetate408 claims
- Latanoprost356 claims
- Moxifloxacin240 claims
- Timolol Maleate187 claims
- Dorzolamide-Timolol178 claims
- Lumigan124 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): 51.3 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: $1,255.15
54 payments; by number, the most common kind was 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
- Chesapeake Eye Care And Laser Center LLCAnnapolis, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sidney Tan Chang among 2,899 ophthalmology physician records in California
Sidney Tan Chang, MD 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
- Graduated2004 · median 2001 among the 1,907 with a school on file
- Record last updated2013 · 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 San Diego → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Stuart Brown, M.D.San Diego, CA 921031356376347
- David Campbell, MDSan Diego, CA 921031336176197
- Neil Choplin, M.D.San Diego, CA 921031144205642
- Lawrence Cooper, MDSan Diego, CA 921031518939297
- Jonathan Crowston, M.D./PH.DSan Diego, CA 921031518992247
- Andrew Cu-Unjieng, M.D.San Diego, CA 921031164421400
- Russell Edwards, M.D.San Diego, CA 921031922003706
- Christopher Girkin, MDSan Diego, CA 921031891730073
Common questions
What is Sidney Tan Chang, MD's NPI number?
Sidney Tan Chang, MD's National Provider Identifier (NPI) is 1790888006, issued on Sep 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sidney Tan Chang, MD located?
The NPPES record lists a practice address at 200 W Arbor Dr, San Diego, CA, 92103. Phone: (858) 534-6290. Providers update this record themselves, so call before visiting.
How can I verify Sidney Tan Chang, MD's license?
NPPES lists California license number A125489, 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 Sidney Tan Chang, MD prescribe under Medicare Part D?
In 2024, Sidney Tan Chang, MD had 2,209 Medicare Part D claims for 635 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Sidney Tan Chang, MD's MIPS final score?
The 2023 MIPS final score is 51.3 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.