Shannen K. Allen, MD
NPI 1407876360ActiveIndividual· Ophthalmology· Rockville, MD
Ophthalmology (MD) in Rockville, Maryland, trained at Johns Hopkins University School of Medicine (class of 2002). In 2024 Medicare paid $123,683 for 815 patients, and Part D covered 576 of their prescriptions, 65% of them generic. Alcon Vision LLC was the largest of 9 companies reporting payments in 2025, $869.56 in all, mostly food and beverage.
Overview
| NPI | 1407876360 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 20, 2006 |
| Last updated in NPPES | Jul 7, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | D0064522 | MD |
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 (DC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 815 |
|---|---|
| Services billed | 1,835 across 13 procedure codes |
| Paid by Medicare | $123,683 |
Part D prescriptions in 2024
| Prescriptions (claims) | 576 · 1,292 30-day fills |
|---|---|
| Patients | 165 |
| Total drug cost | $125,668 |
| Generic share | 65% of claims |
Education and affiliations
| Medical school | Johns Hopkins University School of Medicine |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Ophthalmology |
Medical group
- Robert C. Feldman, MD, PARockville, MD · 6 clinicians
Industry payments (Open Payments)
- 2025$869.56 · 34 payments from 9 companies
- 2024$1,364 · 48 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alcon Vision LLC | $231.32 | 9 |
| Tarsus Pharmaceuticals, Inc. | $230.40 | 8 |
| Sun Pharmaceutical Industries Inc. | $143.63 | 7 |
| Bausch & Lomb Americas Inc. | $71.57 | 3 |
| Harrow Eye, LLC | $70.35 | 3 |
What the 2025 payments were for
- Food and Beverage$869.56 · 34 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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