MD on staff OIG Cleared NPI Verified

Kristy Fassler, ND - Proactive Healing

875 Greenland Rd Unit A-1, Portsmouth, NH 03801, USA, 3801 Newington, NH

5.00

About this clinic

Kristy Fassler, ND – Proactive Healing is a naturopathic-medicine clinic in Portsmouth offering an integrative approach to chronic health conditions and hormone imbalance. The practice specializes in functional-medicine workups for thyroid dysfunction and hypothyroidism, combining comprehensive lab assessment with physical examination to identify root causes of symptoms rather than treating in isolation. Dr. Fassler, ND, integrates chiropractic care, detoxification protocols, and laser therapy into individualized treatment plans. The clinic addresses conditions including Lyme disease, chronic fatigue, and osteoporosis, with an emphasis on patient education and active participation in the healing process.

Treatments offered

Laser Therapy (LLLT)

Emerging evidence

Hormone Replacement Therapy (HRT)

Strong evidence

Contact information

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875 Greenland Rd Unit A-1, Portsmouth, NH 03801, USA
3801 Newington, NH

Website

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Office hours

Monday: 9am – 5:30pm
Tuesday – Wednesday: Closed
Thursday: 9am – 5:30pm
Friday – Sunday: Closed

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Contact information

View on map

875 Greenland Rd Unit A-1, Portsmouth, NH 03801, USA
3801 Newington, NH

Website

Get directions

Office hours

Monday: 9am – 5:30pm
Tuesday – Wednesday: Closed
Thursday: 9am – 5:30pm
Friday – Sunday: Closed

Is this your clinic?

Claim your listing to edit your profile, add treatments, respond to reviews, and access patient analytics.

Claim this listing

Already claimed? Sign in →

Patient reviews

5.00

Based on 3 Google reviews

5 ★

4 ★

3 ★

2 ★

1 ★

Dr fassler is brilliant! When most doctors just test to rule out a few things and then just treat the symptoms .. she actually listens and helps your figure out the cause and then helps you deal with it! I couldn’t be more impressed

Stephanie Adams · March 2nd, 2026

Dr. Fassler is very knowledgeable. She helped me and my family during COVID. She saved my wife from the MDs who wanted to remove her gallbladder. My family definitely will be consulting with her in the future.

Richard Clocher · February 7th, 2025

naoto inoue · January 17th, 2024

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