Monica Diem Phuong Nguyen, O.D.
NPI 1134475502ActiveIndividual· Optometrist· Boston, MA
Optometrist (O.D.) in Boston, Massachusetts, trained at University of Houston - College of Optometry (class of 2012). Their prescriptions cost Medicare Part D more than their services did: $44,039 for 142 claims, against $2,256 paid for services in 2024. Glaukos Corporation was the largest of 4 companies reporting payments in 2025, $176.04 in all, mostly food and beverage.
Overview
| NPI | 1134475502 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | O.D. |
| Sole proprietor | No |
| NPI issued | Aug 3, 2012 |
| Last updated in NPPES | Jul 26, 2021 |
| Certified by provider | Jul 26, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Optometrist Primary | 152W00000X | 5059 | MA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Optometry (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 52 |
|---|---|
| Services billed | 71 across 7 procedure codes |
| Paid by Medicare | $2,256 |
Part D prescriptions in 2024
| Prescriptions (claims) | 142 · 188 30-day fills |
|---|---|
| Patients | 35 |
| Total drug cost | $44,039 |
| Generic share | 41% of claims |
Education and affiliations
| Medical school | University of Houston - College of Optometry |
|---|---|
| Graduation year | 2012 |
| Medicare specialty | Optometry |
Medical groups
- Fenway Community Health Center, IncBoston, MA · 83 clinicians
- Redstone Eye Associates LLCStoneham, MA · 5 clinicians
Industry payments (Open Payments)
- 2025$176.04 · 6 payments from 4 companies
- 2024$139.97 · 7 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaukos Corporation | $72.27 | 2 |
| Dompe US, Inc. | $63.42 | 2 |
| Coopervision Inc. | $21.23 | 1 |
| Bausch & Lomb Americas Inc. | $19.12 | 1 |
What the 2025 payments were for
- Food and Beverage$176.04 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 256 optometrists in Boston · All optometrists in Massachusetts