Reid F. Johnstone, MD
Allergy & Immunology Physician · Greenville, SC
Reid F. Johnstone, MD is an allergy & immunology physician with a practice address in Greenville, South Carolina, and NPI 1013907260, issued on Oct 27, 2005. Check the license (South Carolina MD20199, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Reid F. Johnstone
- Credential
- MD
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License numbers
- MD20199 SC
20199 SC
Self-reported in NPPES; status is on the state search - Practice location
- 48 Creekview CT, Greenville, SC 29615
- Phone
- (864) 458-7431
- Enumerated
- Oct 27, 2005
- Record last updated
- Oct 31, 2023
- Fax
- (864) 458-7463
- Medicaid ID
- 201999 SC
- Medicare enrollment
- Enrolled (PECOS I20100813000431); accepts Medicare assignment
- Medical or professional school
- University Of South Carolina School Of Medicine, 1997
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 50 in South Carolina → Look up another NPI →
Also registered at 48 Creekview CT
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Melissa Anderson, MDAllergy & Immunology Physician1861987299
- Jane Gwinn, M.D.Pediatric Pulmonology Physician1821089103
- Rudolph Johnstone, MDAllergy & Immunology Physician1710977962
- Andrea Lantz, MDAllergy & Immunology Physician1164412318
- Thomas Tiller, M. D.Allergy & Immunology Physician1154311306
Verify Reid F. Johnstone in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license MD20199Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.3 times the Medicare Part D claims of the average allergy & immunology physician in 2024
1,740 Medicare Part D claims for 347 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Ipratropium Bromide226 claims
- Azelastine Hcl225 claims
- Montelukast Sodium219 claims
- Fluticasone Propionate185 claims
- Dupixent Syringe101 claims
- Albuterol Sulfate Hfa80 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 54.4 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,124.49
114 payments; by number, the most common kind was food and beverage; the largest payer was Genzyme Corporation. The 2,496 providers of this specialty with any payment received $8,321.81 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Allergy Partners PLLCGreenville, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Reid F. Johnstone among 50 allergy & immunology physician records in South Carolina
Reid F. Johnstone, MD is one of 50 allergy & immunology physician records with a practice address in South Carolina. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 72% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1997 · median 1998 among the 34 with a school on file
- Record last updated2023 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in South Carolina
There are 50 allergy & immunology physician records in South Carolina.
All 50 in South Carolina → Every provider in Greenville → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Melissa Anderson, MDGreenville, SC 296151861987299
- Douglas Johnston, DOGreenville, SC 296151124048079
- Rudolph Johnstone, MDGreenville, SC 296151710977962
- Andrea Lantz, MDGreenville, SC 296151164412318
- Thomas Tiller, M. D.Greenville, SC 296151154311306
- Charles Greene, M.D.Greenville, SC 296071215985874
- Erin Mullaney, M.D.Greenville, SC 296071285924662
- Shiven Patel, M.D.Greenville, SC 296071215355797
Common questions
What is Reid F. Johnstone, MD's NPI number?
Reid F. Johnstone, MD's National Provider Identifier (NPI) is 1013907260, issued on Oct 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Reid F. Johnstone, MD located?
The NPPES record lists a practice address at 48 Creekview CT, Greenville, SC, 29615. Phone: (864) 458-7431. Providers update this record themselves, so call before visiting.
How can I verify Reid F. Johnstone, MD's license?
NPPES lists South Carolina license number MD20199, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Reid F. Johnstone, MD prescribe under Medicare Part D?
In 2024, Reid F. Johnstone, MD had 1,740 Medicare Part D claims for 347 beneficiaries; the average among allergy & immunology physician prescribers was 741. Part D covers Medicare prescriptions only.
What is Reid F. Johnstone, MD's MIPS final score?
The 2023 MIPS final score is 54.4 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.