Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Ronald L. Johnson, MD, LLC

Organization Internal Medicine Physician · NPI 1902203326

Ronald L. Johnson, MD, LLC is an Internal Medicine Physician in Columbia, South Carolina. Registered with an NPI since 2014.

In the registry since
2014
Specialties on file
2
What do these letters mean?
LLC — Limited liability company
A form of business registration, not a clinical qualification.

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Practice location Address checks out

4100 N Main St Ste 201
Columbia, SC 29203-5800
Phone: (803) 786-0980
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X
Endocrinology, Diabetes & Metabolism Physician Taxonomy 207RE0101X

Record details

NPI number1902203326
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Ronald Johnson — Owner · (803) 786-0980
NPI enumeratedDecember 1, 2014
Last updated in NPPESDecember 1, 2014
Mailing address4100 N Main St, Suite 201, Columbia, SC 29203-5800

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