Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark P Johnson, PA
Physician Assistant in Durham, NC · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1861592131
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Registry record
Entity type Individual (Type 1)
Name Mark P Johnson
Credential PA
Sex Male
Practice address Tisch Brain Tumor Center at Duke, Dumc Box 3624, 047 Baker House, Trent Drive, Durham, NC, 27710
Phone (919) 684-5301
Fax (919) 684-6674
Enumeration date Sep 25, 2006
Last updated in NPPES Apr 6, 2016
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 102978 (NC) Primary
PA · Physician Assistant: A licensed clinician who practices medicine in collaboration with physicians, trained in a graduate PA program.
About the PA credential
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.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Mark Johnson?
Mark Johnson is registered in NPPES with the primary taxonomy of Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-04-06.