1. Home
  2. Directory
  3. New Hampshire
  4. Derry
  5. Counselor
  6. NPI Profile

GWENDOLYN CALLAHAN
NPI 1205095429
Counselor - Mental Health in Derry, NH

Active since June 03, 2008
10 TSIENNETO RD, DERRY, NH 03038(603) 434-1577(603) 434-3101 Get Directions Write a Review

NPPES record last updated: June 3, 2008. Verified against the NPPES registry weekly; last sync: August 23, 2026.

About Gwendolyn Callahan NPPES

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

GWENDOLYN CALLAHAN (NPI 1205095429) is an individual mental health provider in Derry, New Hampshire and active in the NPI registry since June 2008.

NPPES Registry Identity

NPI1205095429
Entity TypeIndividualFemale
Primary Taxonomy101YM0800X
Provider Legal NameGWENDOLYN CALLAHAN
Location Address10 TSIENNETO RDDerry, NH 03038-1505
Mailing Address10 Tsienneto RdDerry, NH 03038-1505 · (603) 434-1577 · Fax (603) 434-3101
Phone(603) 434-1577
Fax(603) 434-3101
Sole ProprietorNo
Enumeration DateJune 3, 2008
✔ NPI 1205095429 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
10 TSIENNETO RD, Derry, NH 03038
Open in Google Maps ↗

Other Providers at the Same Location NPPES 20

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

SARAH BADAMI
Counselor (Mental Health)
10 TSIENNETO RD
DERRY, NH 03038
Rockingham County (603) 434-1577
CATHERINE BOLDUC
Case Manager/Care Coordinator
10 TSIENNETO RD
DERRY, NH 03038
Rockingham County (603) 434-1577
MENTAL HEALTH CENTER FOR SOUTHERN NEW HAMPSHIRE INC
Clinic/Center (Mental Health (Including Community Mental Health Center))
10 TSIENNETO RD
DERRY, NH 03038
Rockingham County (603) 434-1577
VALERIE VIGUE LCMHC
Counselor (Mental Health)
10 TSIENNETO RD
DERRY, NH 03038
Rockingham County (603) 434-1577
STEPHANIE CUTHBERT
Counselor (Mental Health)
10 TSIENNETO RD
DERRY, NH 03038
Rockingham County (603) 434-1577
EMILY JACKSON
Counselor (Mental Health)
10 TSIENNETO RD
DERRY, NH 03038
Rockingham County (603) 965-0761
ALEX REARDON
Nurse Practitioner (Psychiatric/Mental Health)
10 TSIENNETO RD
DERRY, NH 03038
Rockingham County (603) 434-1577
KATHERINE MASCARO LCMHC
Counselor (Mental Health)
10 TSIENNETO RD
DERRY, NH 03038
Rockingham County (603) 965-9942

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 Gwendolyn Callahan's NPI number?

The NPI number for Gwendolyn Callahan is 1205095429. It was assigned to this individual provider in the NPPES registry on June 3, 2008.

Where is Gwendolyn Callahan located?

Gwendolyn Callahan practices at 10 Tsienneto Rd, Derry, NH 03038. The listed phone number is (603) 434-1577.

What is Gwendolyn Callahan's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

When was this NPI record last updated?

The NPPES record for Gwendolyn Callahan was last updated on June 3, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.