Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mark Allen Johnson, DMD
Dentist in Dunedin, FL · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1235269911
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Registry record
Entity type Individual (Type 1)
Name Dr. Mark Allen Johnson
Credential DMD
Sex Male
Practice address 2213 Curlew Rd, Dunedin, FL, 34698
Phone (727) 437-7774
Fax (727) 437-7714
Enumeration date Mar 6, 2007
Last updated in NPPES Apr 25, 2024
Taxonomy & licenses
DMD — Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees.
About the DMD 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 Dentist. 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 2024-04-25.