John C. Allen, M.D.
NPI 1023436839ActiveIndividual· Internal Medicine· Baltimore, MD
Internal Medicine (M.D.) in Baltimore, Maryland, trained at University of Maryland School of Medicine (class of 2014). Their prescriptions cost Medicare Part D more than their services did: $245,757 for 2,233 claims, against $44,351 paid for services in 2024.
Overview
| NPI | 1023436839 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 31, 2014 |
| Last updated in NPPES | Nov 30, 2021 |
| Certified by provider | Nov 30, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | D83158 | 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 | 238 |
|---|---|
| Services billed | 772 across 22 procedure codes |
| Paid by Medicare | $44,351 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,233 · 5,012 30-day fills |
|---|---|
| Patients | 261 |
| Total drug cost | $245,757 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | University of Maryland School of Medicine |
|---|---|
| Graduation year | 2014 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Agape Physical Therapy and Sports Rehabilitation LPForest Hill, MD · 678 clinicians
- University of Maryland Physicians PABaltimore, MD · 404 clinicians
Hospital affiliations
- Umd Rehabilitation & Orthopaedic InstituteBaltimore, MD
- University of Maryland Medical CenterBaltimore, MD
- University of MD Medical Center Midtown CampusBaltimore, MD
Other facilities
- Vna of MarylandHome health agency · Owings Mills, 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 1,555 internal medicine physicians in Baltimore · All internal medicine physicians in Maryland