Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Christopher Thaxter Lenk, PSYD
Psychologist in Chelsea, MA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1366422339
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Registry record
Entity type Individual (Type 1)
Name Dr. Christopher Thaxter Lenk
Credential PSYD
Sex Male
Practice address 151 Everett Ave, Chelsea Healthcare Center, Chelsea, MA, 02150
Phone (617) 889-8515
Fax (617) 889-8509
Enumeration date Jan 18, 2006
Last updated in NPPES Aug 14, 2009
Taxonomy & licenses
PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice.
About the PSYD 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
Where does Christopher Lenk practice?
The practice location on file with NPPES is in Chelsea, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Christopher Lenk?
The National Provider Identifier (NPI) for Christopher Lenk is 1366422339, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-08-14.