Gwendolyn Callahan

Mental Health Counselor

GenderFemaleNPI1205095429Affiliated sites1

Affiliated Health Centers

Gwendolyn Callahan is affiliated with 1 federally qualified health center location.

Healthy Together

10 Tsienneto Rd, Derry, NH 03038-1505

Mental Health & Behavioral Health Services

Counseling, therapy, and psychiatric care for depression, anxiety, trauma, and substance use — affordable and accessible.

Individual therapy

Group counseling

Substance use treatment

Psychiatric evaluation

Crisis intervention

Trauma-informed care

Medication management

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Clinician information is sourced from the NPPES National Provider Registry (February 2026) and reflects self-reported practice locations. Individual providers may have joined or left since the last registry update.

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Mental Health Counselor

Providing mental health counselor services at federally qualified health centers with sliding fee scale options.

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Gwendolyn Callahan

Affiliated Health Centers

Mental Health & Behavioral Health Services

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