Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Alexis Morgan Siejack, M.S.
Behavior Analyst in Baltimore, MD · enumerated 2019.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1396307906
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Alexis Morgan Siejack
Credential M.S.
Sex Female
Practice address 6 Glenwest Ct, Baltimore, MD, 21237
Phone (443) 591-0406
Enumeration date Jul 3, 2019
Last updated in NPPES Jul 3, 2021
Taxonomy & licenses
103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License LBA964 (MD) Primary
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
What is the NPI number for Alexis Siejack?
The National Provider Identifier (NPI) for Alexis Siejack is 1396307906, a Type 1 (individual) record in the CMS NPPES registry.
Where does Alexis Siejack practice?
The practice location on file with NPPES is in Baltimore, MD. Providers can have multiple locations; NPPES lists the primary practice address.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-03.