Marcus Blackstone, MD
NPI 1366453458 · Internal Medicine Physician · Simpsonville, SC
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marcus Blackstone, MD is a Internal Medicine Physician provider in Simpsonville, SC (NPI 1366453458).
Provider details
- NPI number
- 1366453458
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 18747 (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
19 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
- 2006-08-11
- Last updated
- 2012-06-19
Frequently asked questions
- What is Marcus Blackstone's NPI number?
- Marcus Blackstone's National Provider Identifier (NPI) is 1366453458, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marcus Blackstone's specialty?
- Marcus Blackstone is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marcus Blackstone located?
- Marcus Blackstone's practice location on file with NPPES is 404 Se Main St, Simpsonville, SC 29681-2652.
- What is Marcus Blackstone's phone number?
- The practice phone number listed in the NPPES registry for Marcus Blackstone is (864) 963-8002.
- Does Marcus Blackstone accept Medicare?
- Marcus Blackstone is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marcus Blackstone's NPI active?
- Yes — Marcus Blackstone's NPI (1366453458) is active in the NPPES registry as of the last update on 2012-06-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.