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Psychiatrist in Manchester, New Hampshire Thor Agustsson, Psychiatrist

Gender Identity: Male

Ages Served: 18-75+

Appointments: In-office and Online

Manages Medications: Yes

Accepts Insurance: Yes - View accepted plans

Thor Agustsson, Psychiatrist

Thor Agustsson, DO

Specializes In:

ADHD
Anxiety
Attention & focus
Panic attacks
Stress management
Transcranial Magnetic Stimulation
See all specialties >

Dr. Agustsson received his Bachelor of Science in Chemistry from Loyola University and his doctoral degree in Osteopathic Medicine from the Chicago College of Osteopathic Medicine. He completed his psychiatric residency at Louisiana State University Health Sciences Center/Ochsner Clinic in New Orleans, LA. Dr. Agustsson is a Member of the American Psychiatric Association, and sits on the National Board of Osteopathic Medical Examiners. Upon completion of his residency, Dr. Agustsson provided emergency psychiatric services in Jackson, LA in the aftermath of hurricane Katrina; he assisted in the evacuation of over 50 patients in an acute inpatient psychiatric facility, and provided ongoing crisis treatment. Dr. Agustsson went on to provide emergency evaluation and treatment at Charity/Louisiana University Hospital in the emergency department and hospital wards where he also taught and supervised medical students and first-year residents. Dr. Agustsson then began working for Rural Outreach Psychiatry, a non-profit organization providing outpatient and telemental health psychiatric evaluation and evidence-based psychopharmacologic treatment. At that time, he was also working with clients in an outpatient setting completing psychiatric evaluations and evidence based treatment with the goal of preventing acute inpatient hospitalization. Before joining The Counseling Center, Dr. Agustsson worked at Maine Behavioral Health, an outpatient community mental health center where he provided psychiatric evaluation and evidenced based treatment. Dr. Agustssion has provided psychiatric treatment for adults, adolescents, and children, and has developed specialty in the treatment of ADHD, Mood Disorders, Bipolar Disorder, Depression, Post-Traumatic Stress Disorder, Anxiety Disorders including Panic disorder and OCD, patients with co-occurring chronic pain, traumatic brain injury, and Suboxone maintenance. Dr. Agustsson has spoken regionally on opioid addiction and treatment, and is a DEA certified Suboxone treatment provider.

Types of Care & Ages Served

Areas of Focus

Psychiatry/Medication Management

Treat and prevent mental health disorders using medication and therapy.

  • ADHD
  • Anxiety
  • Attention & focus
  • Panic attacks
  • Stress management
  • Anger issues
  • Bipolar Disorder
  • Depression/feeling down
  • Hallucinations
  • Intense mood changes
  • Men's health/issues
  • Obsessive Compulsive Disorder
  • Phobias
  • Psychosis/issues with reality
  • Schizophrenia/schizoaffective
  • Self-esteem
  • Sleep issues or insomnia
  • Unusual thoughts or beliefs

Transcranial Magnetic Stimulation

Specialty treatments include innovative, approved, and rapid-acting approaches for difficult-to-treat conditions.

Languages

  • English

Education

  • Chicago College of Osteopathic Medicine

FAQs

Please call us at 603-516-0335 to schedule an appointment with Thor Agustsson.

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See what our patients are saying about Thor Agustsson

Dr. Thor — Exceptional Psychiatric Care: Expertise & Approach : I've been seeing Dr. Thor at LifeStance for about a year, and I'll say it plainly: he's one of the best psychiatrists I've encountered in this area. What makes him stand out isn't just that he knows his stuff; He listens. Not the performative kind where someone's half-glancing at a screen ...he genuinely listens, catches what you're saying, and it shows in how he structures treatment plans. Complex Care Done Right: I came in managing some complex conditions and feel confident in the care this practice provides. Finding the right provider for that isn't easy — I feel very fortunate. LifeStance as a Practice : LifeStance as a whole has genuinely impressed me.. So much that I referred my spouse to have their care transferred here. They're responsive to calls and voicemails, and they handle complex prior authorizations without you having to chase them — sometimes before you even realize you need it. That kind of proactive care is rare, and it matters. They're operating well above the standard for this region. One Request : The one thing I hope they tackle soon is giving patients more control through the portal. Scheduling, cancellations, and brief visit summaries still require a phone call in most cases. In 2026, that's little friction point, not everyone does well over the phone, lines aren't available 24/7, and most comparable services have moved past this. It would be a meaningful, timely upgrade, especially for patients managing ongoing care. That said — keep doing what you're doing. The clinical care here is genuinely excellent.
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Oshane C.

Oshane C.

Apr 22, 2026
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Dr. Thor Agustsson has been an amazing help to me. During appointments he listens and responds appropriately to my concerns. If a medication is not working, he doesn’t brushed it off, he asks questions and provides information or adjusts the medication as needed. A provider that listens and actively works with you to find a treatment that works for you is rare. It takes time to find something that works and Dr. Agustsson did not give up and passively prescribe medication that wasn’t working.
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Abigail B.

Abigail B.

Mar 28, 2022
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Dr. Agustsson is an incredible person. I’ve never seen a psychiatrist before, yet he was incredibly welcoming and easy to talk to. Not only was he a very personable person to speak with, but he completely understood my issues and helped me solve them as quickly as possible. It’s only been a few days since I’ve gone, but he put me on meds that have completely changed my life, and that’s not an exaggeration! Great experience all around.
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Zachary L.

Zachary L.

Mar 22, 2023
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I came to see Dr. Augustsson for extreme panic & anxiety that had resurfaced after many years. He is very kind and listened to my concerns & fears. He didn’t try to push any new medications and was super helpful/knowledgeable about the ones I was currently taking. I recommend him highly.
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Emily G.

Emily G.

May 19, 2026
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He is good at what he does! He also listens to what you need and want for yourself and takes your input into consideration when providing treatment. He explains the treatment plan clearly and never forces any treatment plan that you are not comfortable with. I definitely recommend Thor!
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Heather

Heather

Aug 05, 2025
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I can only personally recommend Dr. Augusston . He's amazing, attentive and provides and environment that is non judgemental and inviting. It's definitely helpful the staff is also very friendly and seem to focus on 1 person at a time. Ive already recommended several friends and family!
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Crystal B.

Crystal B.

Jun 06, 2025
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The testimonials and reviews shared on our platforms reflect the personal experiences and opinions of individuals voluntarily shared on third-party sites (e.g., Google). These reviews are voluntarily provided and are not compensated, solicited, or endorsed by LifeStance Health.

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  • Clinician qualifications, expertise, and fit for your specific needs should be assessed through direct consultation

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