Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mary Elizabeth Lyons-Hunter, PSYD
Psychologist in Chelsea, MA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1538140363
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Registry record
Entity type Individual (Type 1)
Name Dr. Mary Elizabeth Lyons-Hunter
Credential PSYD
Sex Female
Practice address 151 Everett Ave, Mgh Chelsea Healthcare Ctr, Chelsea, MA, 02150
Phone (617) 889-8515
Fax (617) 889-8509
Enumeration date Nov 9, 2005
Last updated in NPPES Jul 8, 2007
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 Mary Lyons-Hunter 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 Mary Lyons-Hunter?
The National Provider Identifier (NPI) for Mary Lyons-Hunter is 1538140363, 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 2007-07-08.