Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mark Alexander Stevens, D.M.D.
Dentist in Chelmsford, MA · enumerated 2016.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1982053203
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Registry record
Entity type Individual (Type 1)
Name Dr. Mark Alexander Stevens
Credential D.M.D.
Sex Male
Practice address 18 North Rd Ste 9, Chelmsford, MA, 01824
Phone (978) 256-2561
Enumeration date Jun 7, 2016
Last updated in NPPES Feb 10, 2026
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 Stevens?
Mark Stevens 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.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-10.