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KATHLEEN CALLAHAN
NPI 1306717087
Social Worker in Cambridge, MA

Active since September 15, 2025
875 MASSACHUSETTS AVE STE 4, CAMBRIDGE, MA 02139(513) 638-2323 Get Directions Write a Review

NPPES record last updated: September 15, 2025. Verified against the NPPES registry weekly; last sync: August 30, 2026.

About Kathleen Callahan NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

KATHLEEN CALLAHAN (NPI 1306717087) is an individual social worker in Cambridge, Massachusetts and active in the NPI registry since September 2025.

NPPES Registry Identity

NPI1306717087
Entity TypeIndividualFemale
Primary Taxonomy104100000X
Provider Legal NameKATHLEEN CALLAHAN
Location Address875 MASSACHUSETTS AVE STE 4Cambridge, MA 02139-3067
Mailing Address875 Massachusetts Ave Ste 4Cambridge, MA 02139-3067 · (513) 638-2323
Phone(513) 638-2323
Sole ProprietorNo
Enumeration DateSeptember 15, 2025
NPPES CertifiedSeptember 15, 2025
✔ NPI 1306717087 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial WorkerBehavioral Health & Social Service Providers
Taxonomy Code104100000X
Definition
A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.
875 MASSACHUSETTS AVE STE 4, Cambridge, MA 02139
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Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MENTAL HEALTH MATTERS PRACTICE PLLC
Social Worker (Clinical)
875 MASSACHUSETTS AVE STE 4
CAMBRIDGE, MA 02139
Middlesex County (617) 812-1697
MRS. KAYLEY WALSH MSW, LICSW
Social Worker (Clinical)
875 MASSACHUSETTS AVE STE 4
CAMBRIDGE, MA 02139
Middlesex County (617) 256-2484

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Kathleen Callahan's NPI number?

The NPI number for Kathleen Callahan is 1306717087. It was assigned to this individual provider in the NPPES registry on September 15, 2025.

Where is Kathleen Callahan located?

Kathleen Callahan practices at 875 Massachusetts Ave Ste 4, Cambridge, MA 02139. The listed phone number is (513) 638-2323.

What is Kathleen Callahan's specialty?

The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.

When was this NPI record last updated?

The NPPES record for Kathleen Callahan was last updated on September 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.