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Rudolph Gordon Johnstone III, MD

NPI 1710977962ActiveIndividual· Allergy & Immunology· Greenville, SC

Allergy & Immunology (MD) in Greenville, South Carolina, trained at Medical University of South Carolina College of Medicine (class of 1986). In 2024 Medicare paid $135,314 for 407 patients, and Part D covered 560 of their prescriptions, 82% of them generic. Genzyme Corporation was the largest of 19 companies reporting payments in 2025, $2,033 in all, mostly food and beverage.

Overview

NPI1710977962
StatusActive
Entity typeIndividual
CredentialMD
Sole proprietorNo
NPI issuedOct 27, 2005
Last updated in NPPESOct 31, 2023
Certified by providerOct 31, 2023

Specialties and licenses

TaxonomyCodeLicenseState
Allergy & Immunology Primary207K00000XMD13617SC
Allergy & Immunology207K00000X13617SC

About license numbers in NPPES

Exclusion screening

ListResultDetails
HHS-OIG LEIE · Oct 9, 2026No matchChecked by NPI and by name + state
North Carolina Medicaid · Nov 4, 2026No match—
New York OMIG · Nov 4, 2026No match—
Ohio Medicaid · Nov 4, 2026No match—
Pennsylvania Medicheck · Nov 4, 2026No match—
Washington HCA · Nov 4, 2026No match—

Official OIG search · How matching works ·Bulk check a roster

Medicare

Enrollment (PECOS)Enrolled Practitioner - Allergy/Immunology (SC)
Accepts assignmentYes (participating)

Medicare services in 2024

Medicare patients407
Services billed9,450 across 22 procedure codes
Paid by Medicare$135,314

Part D prescriptions in 2024

Prescriptions (claims)560 · 953 30-day fills
Patients169
Total drug cost$63,460
Generic share82% of claims

Medicare sources and data years

Education and affiliations

Medical schoolMedical University of South Carolina College of Medicine
Graduation year1986
Medicare specialtyAllergy/Immunology

Medical group

Source: CMS Care Compare

Industry payments (Open Payments)

  • 2025$2,033 · 100 payments from 19 companies
  • 2024$1,543 · 81 payments from 16 companies

Top paying companies in 2025

What the 2025 payments were for

  • Food and Beverage$1,999 · 99 payments
  • Education$34.00 · 1 payment

Receiving payments does not imply wrongdoing. What Open Payments covers ·original records

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