Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Sandra 'Alexandra' Mahr Harper, MSW. LCSW-C
Social Worker in Baltimore, MD · enumerated 2009.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1720227432
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Registry record
Entity type Individual (Type 1)
Name Sandra 'Alexandra' Mahr Harper
Credential MSW. LCSW-C
Sex Female
Practice address 8307 Philadelphia Road, Rosedale Psychological Services, Baltimore, MD, 21237
Phone (410) 687-7700
Fax (410) 687-7702
Enumeration date Feb 19, 2009
Last updated in NPPES Feb 19, 2009
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
What is the NPI number for Sandra 'Alexandra' Mahr Harper?
The National Provider Identifier (NPI) for Sandra 'Alexandra' Mahr Harper is 1720227432, a Type 1 (individual) record in the CMS NPPES registry.
Where does Sandra 'Alexandra' Mahr Harper practice?
The practice location on file with NPPES is in Baltimore, MD. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-02-19.