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

Dr. John Michael Grayson, MD

Individual provider Cardiovascular Disease Physician · NPI 1902862253

Dr. John Michael Grayson, MD is a Cardiovascular Disease Physician in Charleston, South Carolina. Licensed in South Carolina. Registered with an NPI since 2006.

Licensed in
SC
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

316 Calhoun St
Charleston, SC 29401-1113
Phone: (843) 789-1620
Fax: (843) 724-2440
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 8736 (SC)

Record details

NPI number1902862253
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 25, 2006
Last updated in NPPESOctober 19, 2015

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