Chao Sun
Optometrist · Woodland, CA
Chao Sun is an optometrist with a practice address in Woodland, California, and NPI 1043669062, issued on Jun 9, 2016. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Chao Sun
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 8979T TX
Self-reported in NPPES; status is on the state search - Practice location
- 1836 Mezger Dr, Woodland, CA 95776
- Phone
- (857) 526-3947
- Enumerated
- Jun 9, 2016
- Record last updated
- Jul 1, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (281) 933-8612
- Medicare enrollment
- Enrolled (PECOS I20251120002033); may accept Medicare assignment
- Medical or professional school
- New England College Of Optometry, 2016
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Verify Chao Sun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average optometrist in 2024
17 Medicare Part D claims, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D.
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.
Chao Sun among 8,308 optometrist records in California
Chao Sun 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 2016, is newer than 73% of them.
- NPI issued2016 · 73% of these records are older, 24% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2016 · median 2008 among the 3,573 with a school on file
- Record last updated2016 · 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).
Optometrist providers in California
There are 8,308 optometrist records in California.
All 8,308 in California → Every provider in Woodland → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Amy Brown, ODWoodland, CA 957761265508576
- Ernest Chang, ODWoodland, CA 957761235786898
- Thomas Fong, ODWoodland, CA 957761235750449
- Kali Leonard, ODWoodland, CA 957761114099157
- Ellen Liebowitz, ODWoodland, CA 957761194897132
- Selene Lum, O.D.Woodland, CA 957761881825958
- Elizabeth Boliard, ODRocklin, CA 957651124736178
- Jerome Brendel, O.D.Rocklin, CA 957651831189620
Common questions
What is Chao Sun's NPI number?
Chao Sun's National Provider Identifier (NPI) is 1043669062, issued on Jun 9, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Chao Sun located?
The NPPES record lists a practice address at 1836 Mezger Dr, Woodland, CA, 95776. Phone: (857) 526-3947. Providers update this record themselves, so call before visiting.
How can I verify Chao Sun's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Chao Sun prescribe under Medicare Part D?
In 2024, Chao Sun had 17 Medicare Part D claims; 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.