Physician Profile
Olivia Choon Ong, MD
Unclaimed ProfileAbout Dr. Ong
Based in Monrovia, CA, Olivia Choon Ong, MD is listed in the NPI registry under ophthalmology. Olivia graduated from University of California, Geffen School of Medicine in 1997. Olivia is also listed as specializing in ophthalmology — glaucoma. According to Medicare claims data, Olivia cared for 218 Medicare patients across 256 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
Source: NPPES NPI Registry
Contact Information
- (626) 358-1080
- Email not available
Practice Locations
855 W FOOTHILL BLVD
Monrovia, CA 91016
Conditions Commonly Evaluated or Treated
Within Ophthalmology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Procedures & services
Most searched procedures
Procedures Most Often Billed to Medicare
256 services · 218 patients · 6 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Removal of cataract with insertion of prosthetic lens | Procedure | 66984 |
32 |
| Imaging of optic nerve | Treatment | 92133 |
34 |
| Imaging of retina | Treatment | 92134 |
19 |
| Exam of visual field with extended testing | Treatment | 92083 |
14 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
114 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
43 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other ophthalmology specialists at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 2
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 3
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 24 related providers in 3 groups
Trained at University of California, Geffen School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1997 at University of California, Geffen School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of cataract with insertion of prosthetic lens 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Dr. Ong's specialty?
Dr. Ong is an ophthalmology in Monrovia, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “OPHTHALMOLOGY”.
NPI registry
Where can I find Dr. Ong?
Dr. Ong is listed at 855 W FOOTHILL BLVD, Monrovia, CA 91016. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Ong?
The number on file is (626) 358-1080. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Ong's NPI number?
Dr. Ong's National Provider Identifier is 1124021688. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Ong's medical education?
Dr. Ong attended University of California, Geffen School of Medicine, graduating in 1997. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Ong been practicing?
Dr. Ong has 29 years experience. Calculated from a graduation year of 1997, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Ong known for?
According to Medicare billing data, Dr. Ong performs procedures including removal of cataract with insertion of prosthetic lens; provides treatments such as imaging of optic nerve and imaging of retina, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Ong confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Ong. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.