Reid F. Johnstone, MD
NPI 1013907260ActiveIndividual· Allergy & Immunology· Greenville, SC
Allergy & Immunology (MD) in Greenville, South Carolina, trained at University of South Carolina School of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $1,552,262 for 1,740 claims, against $246,526 paid for services in 2024. Csl Behring was the largest of 22 companies reporting payments in 2025, $2,832 in all, mostly food and beverage.
Overview
| NPI | 1013907260 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 27, 2005 |
| Last updated in NPPES | Oct 31, 2023 |
| Certified by provider | Oct 31, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | MD20199 | SC |
| Allergy & Immunology | 207K00000X | 20199 | SC |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Allergy/Immunology (SC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 455 |
|---|---|
| Services billed | 14,585 across 27 procedure codes |
| Paid by Medicare | $246,526 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,740 · 2,875 30-day fills |
|---|---|
| Patients | 347 |
| Total drug cost | $1,552,262 |
| Generic share | 73% of claims |
Education and affiliations
| Medical school | University of South Carolina School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Allergy/Immunology |
| Secondary specialties | Internal Medicine |
Medical group
- Allergy Partners PLLCFishers, IN · 143 clinicians
Hospital affiliation
- Anmed HealthAnderson, SC
Industry payments (Open Payments)
- 2025$2,832 · 144 payments from 22 companies
- 2024$2,124 · 118 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Csl Behring | $441.41 | 23 |
| Glaxosmithkline, LLC. | $350.48 | 17 |
| Biocryst US Sales Co., LLC | $320.36 | 18 |
| Genzyme Corporation | $273.10 | 19 |
| Astrazeneca Pharmaceuticals LP | $255.88 | 13 |
What the 2025 payments were for
- Food and Beverage$2,798 · 143 payments
- Education$34.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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