Michael F. Diffendall, OD
NPI 1184667057ActiveIndividual· Optometrist· Phoenix, MD
Optometrist (OD) in Phoenix, Maryland, trained at Pennsylvania College of Optometry (class of 1995). Mostly services rather than prescriptions: Medicare paid $26,063 for 249 patients in 2024, with only 45 Part D claims. Tarsus Pharmaceuticals, Inc. was the largest of 4 companies reporting payments in 2025, $269.15 in all, mostly food and beverage.
Overview
| NPI | 1184667057 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | OD |
| Sole proprietor | No |
| NPI issued | Jun 14, 2006 |
| Last updated in NPPES | Oct 30, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Optometrist Primary | 152W00000X | TA1372 | MD |
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 (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 249 |
|---|---|
| Services billed | 354 across 13 procedure codes |
| Paid by Medicare | $26,063 |
Part D prescriptions in 2024
| Prescriptions (claims) | 45 · 59 30-day fills |
|---|---|
| Patients | 32 |
| Total drug cost | $7,944 |
| Generic share | 71% of claims |
Education and affiliations
| Medical school | Pennsylvania College of Optometry |
|---|---|
| Graduation year | 1995 |
| Medicare specialty | Optometry |
Medical group
- M .F. Diffendall Od PAPhoenix, MD · 2 clinicians
Industry payments (Open Payments)
- 2025$269.15 · 11 payments from 4 companies
- 2024$110.83 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Tarsus Pharmaceuticals, Inc. | $205.37 | 8 |
| Coopervision Inc. | $25.36 | 1 |
| Alcon Vision LLC | $23.93 | 1 |
| Johnson & Johnson Vision Care, Inc. | $14.49 | 1 |
What the 2025 payments were for
- Food and Beverage$269.15 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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