Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Gary Buchanan, M.D.

Urology Physician in Charleston, SC · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1104825637

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Registry record

Entity type Individual (Type 1)

Name Mark Gary Buchanan

Credential M.D.

Sex Male

Practice address 1470 Tobias Gadson Blvd, Suite 201, Charleston, SC, 29407

Phone (843) 556-7060

Fax (843) 556-9960

Enumeration date Jul 18, 2005

Last updated in NPPES Feb 17, 2017

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 019842 (SC) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
198427	Medicaid	SC	-
20 4068094	Other	SC	TAX ID

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1104825637 active?

Yes, as of the latest NPPES snapshot, NPI 1104825637 is active (record last updated 2017-02-17).

How do I verify Mark Buchanan's NPI record?

Cross-check NPI 1104825637 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-02-17.