Peter L. Wisniewski, MD
NPI 1922157593ActiveIndividual· Internal Medicine· Prince Frederick, MD
Internal Medicine (MD) in Prince Frederick, Maryland, trained at University of Maryland School of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $1,256,003 for 10,326 claims, against $444,279 paid for services in 2024.
Overview
| NPI | 1922157593 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 10, 2007 |
| Last updated in NPPES | Feb 21, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | D40370 | MD |
| Internal Medicine, Pulmonary Disease | 207RP1001X | D40370 | 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 - Internal Medicine (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 825 |
|---|---|
| Services billed | 13,732 across 92 procedure codes |
| Paid by Medicare | $444,279 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,326 · 24,155 30-day fills |
|---|---|
| Patients | 659 |
| Total drug cost | $1,256,003 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | University of Maryland School of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Pulmonary Disease |
| Telehealth | Offers telehealth |
Medical group
- Calvert Internal Medicine Group, PADunkirk, MD · 39 clinicians
Hospital affiliations
- Calverthealth Medical CenterPrince Frederick, MD
- Medstar Saint Mary's HospitalLeonardtown, MD
Other facilities
- Chesapeake - Potomac Home Health Agency, Inc.Home health agency · Hughesville, MD
- HomecallHome health agency · Easton, MD
- Medstar Health Home CareHome health agency · Hyattsville, MD
- Hospice of the Chesapeake, Inc.Hospice · Prince Frederick, MD
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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All 25 internal medicine physicians in Prince Frederick · All internal medicine physicians in Maryland