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MATTHEW W CALLAHAN
NPI 1245539097
Clinic/Center in Billerica, MA

Active since March 18, 2011
15 ISLINGTON ST, BILLERICA, MA 01821(978) 362-1742 Get Directions Write a Review

NPPES record last updated: March 18, 2011. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Matthew W Callahan NPPES

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

MATTHEW W CALLAHAN (NPI 1245539097) is an individual clinic/center provider in Billerica, Massachusetts and active in the NPI registry since March 2011.

NPPES Registry Identity

NPI1245539097
Entity TypeIndividualMale
Primary Taxonomy261Q00000X
Provider Legal NameMATTHEW W CALLAHAN
Location Address15 ISLINGTON STBillerica, MA 01821-5067
Mailing Address15 Islington StBillerica, MA 01821-5067 · (978) 362-1742
Phone(978) 362-1742
Sole ProprietorYes
Enumeration DateMarch 18, 2011
✔ NPI 1245539097 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/CenterAmbulatory Health Care Facilities
Taxonomy Code261Q00000X
Definition
A facility or distinct part of one used for the diagnosis and treatment of outpatients. Clinic/Center is irregularly defined, sometimes being limited to organizations serving specialized treatment requirements or distinct patient/client groups (e.g., radiology, poor, and public health).
15 ISLINGTON ST, Billerica, MA 01821
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Other Providers at the Same Location NPPES

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

ELIOT COMMUNITY HUMAN SERVICES
Clinic/Center (Adolescent and Children Mental Health)
15 ISLINGTON ST
BILLERICA, MA 01821
Middlesex County (978) 257-4991

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 Matthew Callahan's NPI number?

The NPI number for Matthew Callahan is 1245539097. It was assigned to this individual provider in the NPPES registry on March 18, 2011.

Where is Matthew Callahan located?

Matthew Callahan practices at 15 Islington St, Billerica, MA 01821. The listed phone number is (978) 362-1742.

What is Matthew Callahan's specialty?

The primary specialty registered for this NPI is Clinic/Center with taxonomy code 261Q00000X.

When was this NPI record last updated?

The NPPES record for Matthew Callahan was last updated on March 18, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years 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.