Geraldine Callahan, NP
Geraldine Callahan is a Nurse Practitioner based in Nashua, NH with over 35 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Geraldine Callahan, NP has practiced nursing for 35+ years, working in group practice. With 35+ years of experience, she has been practicing in the Nashua area. (1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent de...
Recent · 75dNPPES updated 2026-03-09 · verify NPI on CMS · Verify license at New Hampshire Board of Medicine
$79 received from industry
3 transactions reported in 2024 ·Low tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Geraldine Callahan's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Board certified · Mar 8, 2026
Self-reported via NPPES
35 years in practice
Senior practitioner
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Taxonomy: 363L00000X
Virtual Nursing Care With Geraldine Callahan
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Geraldine Callahan for follow-ups, medication reviews, and ongoing care — no travel to Nashua required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Geraldine Callahan
Dr. Callahan is listed as active in the NPI registry with telehealth listed in Nashua, NH. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (603) 889-8648.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024. See Data Methodology.
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Contact Geraldine Callahan
Practice Location
39 Simon St Ste 5, Nashua, NH 03060-3045
Mailing Address
39 Simon St Ste 5, Nashua, NH 03060-3045
This is a provider directory. Contact the office directly to schedule appointments.
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