Darrell Loren Southern, MD
NPI 1548268907ActiveIndividual· Allergy & Immunology· Skillman, NJ
Allergy & Immunology (MD) in Skillman, New Jersey, trained at Columbia University College of Physicians and Surgeons (class of 1971). Their prescriptions cost Medicare Part D more than their services did: $125,455 for 505 claims, against $10,612 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 2 companies reporting payments in 2025, $323.26 in all, mostly food and beverage.
Overview
| NPI | 1548268907 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 11, 2005 |
| Last updated in NPPES | Mar 7, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | MA31265 | NJ |
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 - Allergy/Immunology (NJ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 65 |
|---|---|
| Services billed | 336 across 14 procedure codes |
| Paid by Medicare | $10,612 |
Part D prescriptions in 2024
| Prescriptions (claims) | 505 · 1,098 30-day fills |
|---|---|
| Patients | 71 |
| Total drug cost | $125,455 |
| Generic share | 62% of claims |
Education and affiliations
| Medical school | Columbia University College of Physicians and Surgeons |
|---|---|
| Graduation year | 1971 |
| Medicare specialty | Allergy/Immunology |
Medical group
- Princeton Allergy and Asthma Associates, PASkillman, NJ · 7 clinicians
Industry payments (Open Payments)
- 2025$323.26 · 3 payments from 2 companies
- 2024$138.23 · 5 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $198.39 | 2 |
| Ars Pharmaceuticals Operations, Inc. | $124.87 | 1 |
What the 2025 payments were for
- Food and Beverage$323.26 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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