Randall R. Chun, OD
Optometrist · Placentia, CA
Randall R. Chun, OD is an optometrist with a practice address in Placentia, California, and NPI 1083669626, issued on May 23, 2006. Check the license (California 10681T, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Randall R. Chun
- Credential
- OD
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 10681T CA
Self-reported in NPPES; status is on the state search - Practice location
- 1874 N Placentia Ave, Placentia, CA 92870
- Phone
- (714) 996-3937
- Enumerated
- May 23, 2006
- Record last updated
- Feb 7, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (714) 996-3938
- Medicaid ID
- SD0106810 CA
- Medicare enrollment
- Enrolled (PECOS I20050401000894); accepts Medicare assignment
- Medical or professional school
- Southern California College Of Optometry, 1996
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Also registered at 1874 N Placentia Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jennie Chun, ODOptometrist1558392985
Verify Randall R. Chun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 10681TCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average optometrist in 2024
11 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.
Bills Medicare through one group practice
- Aloha Family Optometry IncPlacentia, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Randall R. Chun among 8,308 optometrist records in California
Randall R. Chun, OD 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 66% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated1996 · median 2008 among the 3,573 with a school on file
- Record last updated2012 · 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).
12 optometrist records list a practice address in Placentia
They are 12 of the 1,002 NPPES records with a practice address in Placentia, and 8,308 optometrist records in California.
All 8,308 in California → Every provider in Placentia → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Wynette Augustine, O.D.Placentia, CA 928701245205483
- Simon Chen, O.D.Placentia, CA 928701982794525
- Jeffrey Chen, ODPlacentia, CA 928701154774719
- Jennie Chun, ODPlacentia, CA 928701558392985
- Michael Decarlo, O.D.Placentia, CA 928701346327673
- Jeffrey Dougal, ODPlacentia, CA 928701760560130
- Ling Huang, ODPlacentia, CA 928701386825784
- Jerry Lin, O.D.Placentia, CA 928701710022686
Common questions
What is Randall R. Chun, OD's NPI number?
Randall R. Chun, OD's National Provider Identifier (NPI) is 1083669626, issued on May 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Randall R. Chun, OD located?
The NPPES record lists a practice address at 1874 N Placentia Ave, Placentia, CA, 92870. Phone: (714) 996-3937. Providers update this record themselves, so call before visiting.
How can I verify Randall R. Chun, OD's license?
NPPES lists California license number 10681T, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Randall R. Chun, OD prescribe under Medicare Part D?
In 2024, Randall R. Chun, OD had 11 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.