Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Gretchen Jefferson, PH.D., BCBA-D, NCSP
Behavior Analyst in Westbrook, ME · enumerated 2014.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1477969541
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Registry record
Entity type Individual (Type 1)
Name Dr. Gretchen Jefferson
Credential PH.D., BCBA-D, NCSP
Sex Female
Practice address 15 Saunders Way Woodfords Family Services, Westbrook, ME, 04092
Phone (207) 232-7443
Enumeration date Jul 9, 2014
Last updated in NPPES Jul 9, 2014
Taxonomy & licenses
103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License 1-04-1922 (ME) Primary
103TS0200X School Psychologist Behavioral Health & Social Service Providers · License 31656 (ME) Secondary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers.
About the PHD 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 NPI 1477969541 active?
Yes, as of the latest NPPES snapshot, NPI 1477969541 is active (record last updated 2014-07-09).
How do I verify Gretchen Jefferson's NPI record?
Cross-check NPI 1477969541 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-07-09.