William Z. Sun, M.D.
Ophthalmology Physician · Philadelphia, PA
William Z. Sun, M.D. is an ophthalmology physician with a practice address in Philadelphia, Pennsylvania, and NPI 1043247943, issued on Jun 27, 2006. Check the license (Pennsylvania MD-020214-E, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- William Z. Sun
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- MD-020214-E PA
Self-reported in NPPES; status is on the state search - Practice location
- 2031 Locust St, Philadelphia, PA 19103
- Phone
- (215) 564-4277
- Enumerated
- Jun 27, 2006
- Record last updated
- Mar 24, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (215) 563-9721
- Medicaid ID
- 0810299 PA
- Medicare enrollment
- Enrolled (PECOS I20100621000354); accepts Medicare assignment
- Medical or professional school
- Hahneman Medical College Of The Pacific, 1976
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 1,088 in Pennsylvania → Look up another NPI →
Also registered at 2031 Locust St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Z. Sun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD-020214-ECheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average ophthalmology physician in 2024
1,296 Medicare Part D claims for 241 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Latanoprost673 claims
- Timolol Maleate158 claims
- Neomycin-Polymyxin-Dexameth131 claims
- Dorzolamide-Timolol82 claims
- Prednisolone Acetate60 claims
- Brimonidine Tartrate38 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 MIPS final score for 2023 (Medicare payment program): 5.9 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
William Z. Sun among 1,088 ophthalmology physician records in Pennsylvania
William Z. Sun, M.D. is one of 1,088 ophthalmology physician records with a practice address in Pennsylvania. 81% 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 22% of them.
- NPI issued2006 · 22% of these records are older, 40% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1976 · median 2000 among the 734 with a school on file
- Record last updated2008 · 64% 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 Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Pennsylvania
There are 1,088 ophthalmology physician records in Pennsylvania.
All 1,088 in Pennsylvania → Every provider in Philadelphia → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Stanley Borden, D.O.Philadelphia, PA 191031215373576
- Walter Harris, M.D.Philadelphia, PA 191031689730905
- Lama Al-Aswad, M.D.Philadelphia, PA 191041336174937
- William Anninger, M.D.Philadelphia, PA 191041922038231
- Allison Brucker, M.D.Phialdelphia, PA 191041790718245
- Kristin Hammersmith, MDPhiladelphia, PA 191041437157187
- Deborah Herrmann, MDPhiladelphia, PA 191041346357548
- Bennie Jeng, MDPhiladelphia, PA 191041104852870
Common questions
What is William Z. Sun, M.D.'s NPI number?
William Z. Sun, M.D.'s National Provider Identifier (NPI) is 1043247943, issued on Jun 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Z. Sun, M.D. located?
The NPPES record lists a practice address at 2031 Locust St, Philadelphia, PA, 19103. Phone: (215) 564-4277. Providers update this record themselves, so call before visiting.
How can I verify William Z. Sun, M.D.'s license?
NPPES lists Pennsylvania license number MD-020214-E, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Z. Sun, M.D. prescribe under Medicare Part D?
In 2024, William Z. Sun, M.D. had 1,296 Medicare Part D claims for 241 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is William Z. Sun, M.D.'s MIPS final score?
The 2023 MIPS final score is 5.9 of 100. 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.