Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark Stephens
Behavior Analyst in Roxbury, MA · enumerated 2025.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1871386607
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Registry record
Entity type Individual (Type 1)
Name Mark Stephens
Sex Male
Practice address 504 Dudley St # 520, Roxbury, MA, 02119
Phone (617) 445-6655
Enumeration date May 24, 2025
Last updated in NPPES May 24, 2025
Taxonomy & licenses
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 NPI 1871386607 active?
Yes, as of the latest NPPES snapshot, NPI 1871386607 is active (record last updated 2025-05-24).
How do I verify Mark Stephens's NPI record?
Cross-check NPI 1871386607 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-05-24.