DR. ALEXANDER C CHANG (MD) – Ophthalmology Physician, NPI 1497808760
Ophthalmology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,143 OPHTHALMOLOGY in PA
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Provider Addresses for DR. ALEXANDER C CHANG (MD)
Greentree Road, West End, Pittsburgh, Allegheny County, Pennsylvania, 15233, United States
PITTSBURGH, PA 152201400
Phone: (412) 429-2020
Fax: (412) 429-0932
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 23 Open Payments records for all available years, with a total value of $553.
Total Amount is formed as General ($553) + Research ($0) + Ownership ($0) = $553.
Last reported payment date: 2024-10-01 • Largest payer in this snapshot: Sight Sciences, Inc. ($158).
Total Amount
$553
General + Research + Ownership
Payments
23
Total payment records
General Amount
$553
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-01
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Sight Sciences, Inc. | $158 |
| Novartis Pharmaceuticals Corporation | $88 |
| Amgen Inc. | $71 |
| Alcon Vision LLC | $56 |
| Bausch & Lomb Americas Inc. | $54 |
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: 2010-03-04
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 |
|---|---|---|---|---|
| I20100304000534 | I | Ophthalmology | PA | 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 |
|---|---|---|---|---|
| 92014 | Established patient complete exam of visual system | 1,370 | 1,341 | $0 |
| 92134 | Imaging of retina | 553 | 380 | $0 |
| 92012 | Established patient problem focused exam of visual system | 371 | 325 | $0 |
| 92133 | Imaging of optic nerve | 348 | 336 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 348 | 280 | $0 |
Insurance plans in this area (ZIP 15220)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| OPHTHALMOLOGY | PA | 92012 | Eye and medical examination for diagnosis and treatment, established patient | 311 | 259 |
| OPHTHALMOLOGY | PA | 92083 | Measurement of field of vision during daylight conditions | 162 | 139 |
| OPHTHALMOLOGY | PA | 92134 | Diagnostic imaging of retina | 281 | 242 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| O P H T H A L M O L O G Y | PA | |
| 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 | PA | |
| O P T O M E T R Y | PA | |
| O P T O M E T R Y | PA | |
| O P T O M E T R Y | PA | |
| O P T O M E T R Y | NV |
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