Ronald Lee Johnson, M.D.
Internal Medicine Physician · Columbia, SC
Ronald Lee Johnson, M.D. is an internal medicine physician with a practice address in Columbia, South Carolina, and NPI 1467487686, issued on Jul 12, 2006. Check the license (South Carolina 10556, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Ronald Lee Johnson
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 10556 SC
Self-reported in NPPES; status is on the state search - Practice location
- 4100 Main St, Columbia, SC 29203
- Phone
- (803) 786-0980
- Enumerated
- Jul 12, 2006
- Record last updated
- Oct 1, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (803) 786-6452
- Medicaid ID
- AT1078 SC
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,881 in South Carolina → Look up another NPI →
Also registered at 4100 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elnora Christian, RNAdministrator Registered Nurse1538339866
- Burnett Gallman, M.D.Internal Medicine Physician1336162338
- Christopher Mims, P.T.Physical Therapist1225160088
- Gary Wright, PH.D.Clinical Psychologist1164667572
Verify Ronald Lee Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 10556Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average internal medicine physician in 2024
340 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Labetalol Hcl52 claims
- Clopidogrel47 claims
- Levothyroxine Sodium43 claims
- Pravastatin Sodium43 claims
- Primidone43 claims
- Famotidine33 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.
Ronald Lee Johnson among 1,881 internal medicine physician records in South Carolina
Ronald Lee Johnson, M.D. is one of 1,881 internal medicine physician records with a practice address in South Carolina. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 58% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2013 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
269 internal medicine physician records list a practice address in Columbia
They are 269 of the 11,200 NPPES records with a practice address in Columbia, and 1,881 internal medicine physician records in South Carolina.
All 1,881 in South Carolina → Every provider in Columbia → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Gary Bell, M.D.Columbia, SC 292031689640922
- Anthony Elkins, MDColumbia, SC 292031629045505
- James Gasque, MDColumbia, SC 292031255326096
- Brown McCallum, M.D.Columbia, SC 292031124090352
- Kay McFarland, M.D.Columbia, SC 292031205803020
- Fanwei Meng, MDColumbia, SC 292031780650937
- H Murdaugh, M.D.Columbia, SC 292031083680946
- Mieke Perez, MDColumbia, SC 292031881670305
Common questions
What is Ronald Lee Johnson, M.D.'s NPI number?
Ronald Lee Johnson, M.D.'s National Provider Identifier (NPI) is 1467487686, issued on Jul 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ronald Lee Johnson, M.D. located?
The NPPES record lists a practice address at 4100 Main St, Columbia, SC, 29203. Phone: (803) 786-0980. Providers update this record themselves, so call before visiting.
How can I verify Ronald Lee Johnson, M.D.'s license?
NPPES lists South Carolina license number 10556, 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 Ronald Lee Johnson, M.D. prescribe under Medicare Part D?
In 2024, Ronald Lee Johnson, M.D. had 340 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.