DR. EMMANUEL YIH-HERNG CHANG (MD/PHD) – Retina Specialist (Ophthalmology) Physician, NPI 1083877740
Retina Specialist (Ophthalmology) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,544 OPHTHALMOLOGY in TX
Provider Addresses for DR. EMMANUEL YIH-HERNG CHANG (MD/PHD)
6565 WEST LOOP S STE 400
BELLAIRE, TX 774013510
Phone: (713) 799-9975
Fax: (713) 799-1095
Type: Mailing
Gramercy Outpatient Surgery Center, 2727, Gramercy Street, Houston, Harris County, Texas, 77025, United States
SUITE 200
HOUSTON, TX 770251617
Phone: (713) 799-9975
Fax: (713) 799-1095
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 137 Open Payments records for all available years, with a total value of $90,261.
Total Amount is formed as General ($90,261) + Research ($0) + Ownership ($0) = $90,261.
Last reported payment date: 2024-12-24 • Largest payer in this snapshot: Genentech USA, Inc. ($41,957).
Total Amount
$90,261
General + Research + Ownership
Payments
137
Total payment records
General Amount
$90,261
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
2
Ownership records
Last Payment Date
2024-12-24
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Genentech USA, Inc. | $41,957 |
| Regeneron Healthcare Solutions, Inc. | $25,539 |
| Bausch & Lomb Americas Inc. | $21,060 |
| ABBVIE INC. | $298 |
| Apellis Pharmaceuticals, Inc. | $295 |
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: 2013-08-07
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 |
|---|---|---|---|---|
| I20130807000073 | I | Ophthalmology | TX | 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 |
|---|---|---|---|---|
| J2777 | Injection, faricimab-svoa, 0.1 mg | 43,560 | 151 | $0 |
| 92134 | Imaging of retina | 1,650 | 700 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 1,230 | 615 | $0 |
| 92202 | Extended exam of the back part of the eye with optic nerve drawing | 924 | 427 | $0 |
| 67028 | Injection of drug into eye | 893 | 242 | $0 |
Insurance plans in this area (ZIP 77401)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| OPHTHALMOLOGY | TX | 92134 | Diagnostic imaging of retina | 1409 | 516 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| 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 H T H A L M O L O G Y | TX | |
| O P H T H A L M O L O G Y | TX | |
| O P H T H A L M O L O G Y | KY | |
| O P H T H A L M O L O G Y | TX | |
| O P H T H A L M O L O G Y | TX | |
| O P H T H A L M O L O G Y | MI |
Reviews
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