TOM S CHANG (MD) – Retina Specialist (Ophthalmology) Physician, NPI 1609848969
Retina 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 TOM S CHANG (MD)
East California Boulevard, Madison Heights, Pasadena, Los Angeles County, California, 91105, United States
PASADENA, CA 911053205
Phone: (626) 568-8838
Fax: (626) 583-8838
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 3 Open Payments records for all available years, with a total value of $394.
Total Amount is formed as General ($394) + Research ($0) + Ownership ($0) = $394.
Last reported payment date: 2024-04-10 • Largest payer in this snapshot: Bausch & Lomb Americas Inc. ($174).
Total Amount
$394
General + Research + Ownership
Payments
3
Total payment records
General Amount
$394
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-04-10
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Bausch & Lomb Americas Inc. | $174 |
| Stryker Corporation | $136 |
| International Life Sciences | $84 |
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: 2006-02-01
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 |
|---|---|---|---|---|
| I20060201000549 | 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 |
|---|---|---|---|---|
| J2778 | Injection, ranibizumab, 0.1 mg | 3,990 | 138 | $0 |
| 92134 | Imaging of retina | 2,659 | 620 | $0 |
| Q5128 | Injection, ranibizumab-eqrn (cimerli), biosimilar, 0.1 mg | 2,037 | 125 | $0 |
| 67028 | Injection of drug into eye | 1,889 | 239 | $0 |
| J2781 | Injection, pegcetacoplan, intravitreal, 1 mg | 1,096 | 23 | $0 |
Insurance plans in this area (ZIP 91105)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| O P T O M E T R Y | CA | |
| - | CA | |
| O P T O M E T R Y | CA | |
| - | CA | |
| O P T O M E T R Y | CA | |
| 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 | NY | |
| O P H T H A L M O L O G Y | TX | |
| O P T O M E T R Y | TX |
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