OLIVIA CHOON ONG (MD) – Glaucoma Specialist (Ophthalmology) Physician, NPI 1124021688
Glaucoma Specialist (Ophthalmology) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
2,665 OPHTHALMOLOGY in CA
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Provider Addresses for OLIVIA CHOON ONG (MD)
West Foothill Boulevard, Monrovia, Los Angeles County, California, 91016, United States
MONROVIA, CA 910161938
Phone: (626) 358-1080
Fax: (626) 358-0548
Type: Location
14726 RAMONA AVE STE 203
CHINO, CA 917105730
Phone: (626) 305-9100
Fax: (626) 305-0152
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 89 Open Payments records for all available years, with a total value of $2,229.
Total Amount is formed as General ($2,229) + Research ($0) + Ownership ($0) = $2,229.
Last reported payment date: 2024-12-31 • Largest payer in this snapshot: ABBVIE INC. ($625).
Total Amount
$2,229
General + Research + Ownership
Payments
89
Total payment records
General Amount
$2,229
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-31
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $625 |
| Alcon Vision LLC | $343 |
| Sun Pharmaceutical Industries Inc. | $202 |
| Bausch & Lomb Americas Inc. | $196 |
| Mallinckrodt Hospital Products Inc. | $191 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2008-10-18
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20081018000111 | I | Ophthalmology | CA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 70 | 54 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 27 | 27 | $0 |
| 66984 | Removal of cataract with insertion of prosthetic lens | 23 | 21 | $0 |
| 92133 | Imaging of optic nerve | 15 | 15 | $0 |
| 92025 | Ct scan of cornea | 12 | 11 | $0 |
Insurance plans in this area (ZIP 91016)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| OPHTHALMOLOGY | CA | 92012 | Eye and medical examination for diagnosis and treatment, established patient | 211 | 135 |
| OPHTHALMOLOGY | CA | 92083 | Measurement of field of vision during daylight conditions | 28 | 28 |
| OPHTHALMOLOGY | CA | 92134 | Diagnostic imaging of retina | 36 | 16 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| O P H T H A L M O L O G Y | NV | |
| O P T O M E T R Y | CA | |
| O P H T H A L M O L O G Y | CA | |
| O P H T H A L M O L O G Y | CA | |
| O P H T H A L M O L O G Y | OR | |
| O P H T H A L M O L O G Y | CA | |
| O P H T H A L M O L O G Y | MD | |
| O P H T H A L M O L O G Y | CA | |
| O P T O M E T R Y | CA | |
| O P T O M E T R Y | CA |
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