Huiyi Chen, MD
NPI 1851603609ActiveIndividual· Ophthalmology· Saint Louis, MO
Ophthalmology (MD) with Mercy Clinic Ophthalmology LLC, practicing in Saint Louis, Missouri. In 2024 Medicare paid $133,769 for 451 patients, and Part D covered 1,512 of their prescriptions, 75% of them generic. Alcon Vision LLC was the largest of 9 companies reporting payments in 2025, $950.87 in all, mostly food and beverage. Lists Mercy Hospital St Louis as a hospital affiliation.
Overview
| NPI | 1851603609 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 9, 2010 |
| Last updated in NPPES | Jul 25, 2023 |
| Certified by provider | Jul 25, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | 2015015441 | MO |
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 (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 451 |
|---|---|
| Services billed | 1,421 across 33 procedure codes |
| Paid by Medicare | $133,769 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,512 · 2,788 30-day fills |
|---|---|
| Patients | 314 |
| Total drug cost | $103,152 |
| Generic share | 75% of claims |
Education and affiliations
| Graduation year | 1989 |
|---|---|
| Medicare specialty | Ophthalmology |
Medical group
- Mercy Clinic Ophthalmology LLCSaint Louis, MO · 15 clinicians
Hospital affiliation
- Mercy Hospital St LouisSaint Louis, MO
Industry payments (Open Payments)
- 2025$950.87 · 23 payments from 9 companies
- 2024$833.56 · 31 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alcon Vision LLC | $538.81 | 8 |
| Recordati_rare_diseases_inc. | $112.00 | 1 |
| Abbvie Inc. | $111.39 | 5 |
| Thea Pharma Inc. | $55.87 | 3 |
| Tarsus Pharmaceuticals, Inc. | $54.88 | 2 |
What the 2025 payments were for
- Food and Beverage$950.87 · 23 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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