Olivia Choon Ong, MD
Glaucoma Specialist (Ophthalmology) Physician · Monrovia, CA
Olivia Choon Ong, MD is a glaucoma specialist (ophthalmology) physician with a practice address in Monrovia, California, and NPI 1124021688, issued on May 27, 2005. Check the license (California A66933, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Olivia Choon Ong
- Credential
- MD
- Primary taxonomy
- Glaucoma Specialist (Ophthalmology) Physician 207WX0009X
- License number
- A66933 CA
Self-reported in NPPES; status is on the state search - Practice location
- 855 W Foothill Blvd, Monrovia, CA 91016
- Phone
- (626) 358-1080
- Enumerated
- May 27, 2005
- Record last updated
- Jun 19, 2024
- Fax
- (626) 358-0548
- Medicaid ID
- 00A669330 CA
- Medicare enrollment
- Enrolled (PECOS I20081018000111); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1997
- Entity
- Type 1 · individual
8 nearest glaucoma specialist (ophthalmology) physician records → All 70 in California → Look up another NPI →
Also registered at 855 W Foothill Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Marcus Lemley, MDOphthalmology Physician1558304147
- Pauline Lim, M.D.Ophthalmology Physician1356398770
- Bonnie Peng, ODOptometrist1114968245
- Minh Shaw, O.DOptometrist1558526988
- Mandeep Turna, ODOptometrist1316985948
Verify Olivia Choon Ong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A66933Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.3 times the Medicare Part D claims of the average glaucoma specialist (ophthalmology) physician in 2024
13,093 Medicare Part D claims for 2,066 beneficiaries, against an average of 3,060 among the 430 providers of this specialty who prescribed in Part D. Brand-name drugs were 44% of claims.
Most prescribed
- Latanoprost2,848 claims
- Dorzolamide-Timolol1,605 claims
- Brimonidine Tartrate1,342 claims
- Prednisolone Acetate1,164 claims
- Timolol Maleate1,033 claims
- Ofloxacin716 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.
Industry payments in 2024: $1,010.28
36 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 391 providers of this specialty with any payment received $5,284.60 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 2 group practices
- Azul Vision IncMonrovia, CA
- California Eye Specialists Medical Group IncMonrovia, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Olivia Choon Ong among 70 glaucoma specialist (ophthalmology) physician records in California
Olivia Choon Ong, MD is one of 70 glaucoma specialist (ophthalmology) physician records with a practice address in California. 97% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 96% newer
- In a Medicare fileYes · 97% of these records are
- In the CMS Doctors and Clinicians fileYes · 93% of these records are
- Graduated1997 · median 2013 among the 65 with a school on file
- Record last updated2024 · 30% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207WX0009X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Glaucoma Specialist (Ophthalmology) Physician providers in California
There are 70 glaucoma specialist (ophthalmology) physician records in California.
All 70 in California → Every provider in Monrovia → Glaucoma Specialist (Ophthalmology) Physician nationwide →
The 8 glaucoma specialist (ophthalmology) physician records with the nearest ZIP codes
- Sahar Bedrood, MD,PHDPasadena, CA 911061871851923
- Kay Khine, M.D.Pasadena, CA 911071902239528
- Stephen Wigginton, M.D.Long Beach, CA 908131568468106
- Morgan Renner, M.D., M.P.HLong Beach, CA 908081649565920
- Brian Nguyen, DOThousand Oaks, CA 913601386273050
- Houman Vosoghi, M.D.Westlake Village, CA 913611427279322
- Reza Alizadeh, M.D.Santa Monica, CA 904031205360484
- Philip Ngai, M.D.West Covina, CA 917901649614215
Common questions
What is Olivia Choon Ong, MD's NPI number?
Olivia Choon Ong, MD's National Provider Identifier (NPI) is 1124021688, issued on May 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Olivia Choon Ong, MD located?
The NPPES record lists a practice address at 855 W Foothill Blvd, Monrovia, CA, 91016. Phone: (626) 358-1080. Providers update this record themselves, so call before visiting.
How can I verify Olivia Choon Ong, MD's license?
NPPES lists California license number A66933, 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 Olivia Choon Ong, MD prescribe under Medicare Part D?
In 2024, Olivia Choon Ong, MD had 13,093 Medicare Part D claims for 2,066 beneficiaries; the average among glaucoma specialist (ophthalmology) physician prescribers was 3,060. 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.