Grant Wei-Siang Su, M.D.
NPI 1386723781ActiveIndividual· Ophthalmology· Springfield, IL
Ophthalmology (M.D.) in Springfield, Illinois, trained at Tufts University School of Medicine (class of 2001). 754 Medicare patients in 2024, $491,306 paid; nearly all of their 938 Part D prescriptions were generic (97%). Amgen Inc. reported $50.98 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1386723781 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Nov 4, 2006 |
| Last updated in NPPES | May 19, 2020 |
| Certified by provider | May 19, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | 036117645 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Ophthalmology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 754 |
|---|---|
| Services billed | 9,774 across 102 procedure codes |
| Paid by Medicare | $491,306 |
Part D prescriptions in 2024
| Prescriptions (claims) | 938 · 1,002 30-day fills |
|---|---|
| Patients | 614 |
| Total drug cost | $16,356 |
| Generic share | 97% of claims |
Education and affiliations
| Medical school | Tufts University School of Medicine |
|---|---|
| Graduation year | 2001 |
| Medicare specialty | Ophthalmology |
| Telehealth | Offers telehealth |
Medical group
- Springfield Clinic, LLPSpringfield, IL · 687 clinicians
Hospital affiliations
- Memorial Medical CenterSpringfield, IL
- St Johns HospitalSpringfield, IL
Industry payments (Open Payments)
- 2025$50.98 · 3 payments from 1 company
- 2024$68.48 · 3 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $50.98 | 3 |
What the 2025 payments were for
- Food and Beverage$50.98 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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