John Grayson, MD
NPI 1902862253 · Cardiovascular Disease Physician · Charleston, SC
John Grayson, MD is a Cardiovascular Disease Physician provider in Charleston, SC (NPI 1902862253).
Provider details
- NPI number
- 1902862253
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 8736 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-25
- Last updated
- 2015-10-19
Frequently asked questions
- What is John Grayson's NPI number?
- John Grayson's National Provider Identifier (NPI) is 1902862253, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Grayson's specialty?
- John Grayson is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is John Grayson located?
- John Grayson's practice location on file with NPPES is 316 Calhoun St, Charleston, SC 29401-1113.
- What is John Grayson's phone number?
- The practice phone number listed in the NPPES registry for John Grayson is (843) 789-1620.
- Is John Grayson's NPI active?
- Yes — John Grayson's NPI (1902862253) is active in the NPPES registry as of the last update on 2015-10-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.