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Mark Shaughnessy, Nurse Practitioner

Mark Shaughnessy, MSN, PMHNP-BC, Psychiatry in Portland, Maine

Specialties:
Anxiety Bipolar Disorder Depression/feeling down Intense mood changes Panic attacks Self-esteem Stress management +33
Ages Served
18-74
Manages Medications
Yes
Accepts Insurance

About Mark Shaughnessy (He/Him)

Mark Shaughnessy, PMHNP, is dedicated to providing evidence-based pharmacologic treatment of mental disorders, considering the entirety of each patient’s circumstances. Serving the state of Maine, he collaborates closely with his clients to ensure comprehensive and personalized care. Mark’s approach is holistic, integrating medication management with an understanding of the individual’s life context to foster meaningful improvements in mental health. Specializing in ADHD, anxiety, and depression, Mark uses his extensive expertise to support adults through various life stages. His commitment to treating these conditions is rooted in his belief in the transformative power of tailored pharmacologic interventions. Mark’s ability to address complex mental health issues such as bipolar disorder, PTSD, and psychosis/schizophrenia underscores his dedication to improving the lives of his patients. Mark is particularly passionate about helping those dealing with midlife transitions and men’s issues. He understands the unique challenges faced during these periods and offers targeted support to navigate them effectively. Additionally, his focus on grief and obsessive-compulsive disorder highlights his versatility in addressing a wide range of mental health concerns. Beyond his professional life, Mark enjoys practicing aikido, writing, and boating. These activities reflect his commitment to maintaining a balanced and enriching lifestyle, which he believes is crucial for overall well-being.

Types of Care & Ages Served

Areas of Focus

Psychiatry/Medication Management

Treat and prevent mental health disorders using medication and therapy.

  • Anxiety
  • Bipolar Disorder
  • Depression/feeling down
  • Intense mood changes
  • Panic attacks
  • Self-esteem
  • Stress management
  • ADHD
  • Anger issues
  • Attention & focus
  • Autism: generally independent
  • Brain/head injuries (TBI)
  • Conditions caused by stress
  • Domestic violence & abuse
  • Eating issues: binging
  • Emotional abuse
  • Fertility
  • Gender identity
  • Grief & loss
  • Hair pulling & skin picking
  • Hallucinations
  • Hoarding
  • LGBTQ+
  • Obsessive Compulsive Disorder
  • Other neurological conditions
  • Patterns affecting behavior, emotions and relationships
  • Personality disorders
  • Phobias
  • Post-partum depression & anxiety
  • Pre-conception
  • Pregnancy
  • Pregnancy loss
  • Psychosis/issues with reality
  • Schizophrenia/schizoaffective
  • Sexual trauma
  • Sleep issues or insomnia
  • Stress from ongoing health issues
  • Stroke-related conditions
  • Trauma & PTSD
  • Unusual thoughts or beliefs

Languages

  • English

Education

  • University of Washington
  • MGH Institute of Health Professions

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Frequently Asked Questions About Mark Shaughnessy

Please call us at 207-828-4026 to schedule an appointment with Mark Shaughnessy.

See what our patients are saying about Mark Shaughnessy

This review is for Mark Shaughnessy's practice at CCS Psychiatry in Lewiston. I have been seeing Mr Shaughnessy for two years and find him to be an excellent listener and very knowledgeable in matters of psychiatric health and underlying medical conditions. He takes his role in the profession very seriously and at the same time is understanding and sympathetic.
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Anonymous

Anonymous

Apr 06, 2018
Healthgrades Healthgrades
I've always received the best support here for years. I’m supported, listened to, and have worked through ups and downs in my life, both financially and emotionally. They never give up.
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Kayte R.

Kayte R.

Jul 23, 2026
Google Google
Mark is kind, thoughtful and knowledgeable. These are qualities I like in people and he’s also a medical professional.
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Andrew C.

Andrew C.

Jun 09, 2025
Google Google
Excellent experience
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Kenneth M.

Kenneth M.

Feb 09, 2025
Google Google
Excellent experience
Read Full Review
Bri F.

Bri F.

Dec 12, 2024
Google Google
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Mark Shaughnessy, Psychiatry in Portland, Maine

Mark Shaughnessy

Psychiatry in Portland, Maine

New patient?

Check availability and book your first appointment Call for Availability

Already have an appointment?

Video visit waiting room Join Now
Existing patient portal Sign in