Ryan Patrick Casarella, M.D.
NPI 1740643998ActiveIndividual· Emergency Medicine· Greenwich, CT
Emergency Medicine (M.D.) in Greenwich, Connecticut, trained at University of Massachusetts Medical School (class of 2016). 394 Medicare patients in 2024, $69,035 paid; nearly all of their 193 Part D prescriptions were generic (95%).
Overview
| NPI | 1740643998 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 4, 2016 |
| Last updated in NPPES | Feb 11, 2025 |
| Certified by provider | Feb 11, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | 314567-01 | NY |
| Emergency Medicine | 207P00000X | 19025 | NV |
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 - Emergency Medicine (CT); Practitioner - Emergency Medicine (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 394 |
|---|---|
| Services billed | 492 across 26 procedure codes |
| Paid by Medicare | $69,035 |
Part D prescriptions in 2024
| Prescriptions (claims) | 193 · 194 30-day fills |
|---|---|
| Patients | 113 |
| Total drug cost | $7,147 |
| Generic share | 95% of claims |
Education and affiliations
| Medical school | University of Massachusetts Medical School |
|---|---|
| Graduation year | 2016 |
| Medicare specialty | Emergency Medicine |
Medical group
- Greenwich HospitalGreenwich, CT · 76 clinicians
Hospital affiliations
- Greenwich Hospital Association -Greenwich, CT
- Westchester Medical CenterValhalla, NY
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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