Marcus Nielson, PMHNP

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Address

2355 East Camelback Road Suite 625 Phoenix, AZ 85016

Phone

480-535-0363

Hours

• Monday: 7:00 AM – 7:00 PM
• Tuesday: 7:00 AM – 7:00 PM
• Wednesday: 7:00 AM – 7:00 PM
• Thursday: Closed
• Friday: Closed
• Saturday: 7:00 AM – 7:00 PM
• Sunday: Closed

Insurances Accepted

Aetna
AHCCCS
AmeriBen
Champ VA
Carelon
Cigna
ComPsych
Contigo Health
DMBA
Devoted Health
EMI Health
The Holman Group
Humana
Magellan Health
Medicare
Meritain Health
Optum
Tricare
TriWest CCN
United Healthcare
University Health Plans
Uprise Health

Marcus Nielson, PMHNP

Psychiatric Nurse Practitioner

(Reviews Coming Soon)

About Andrew Nichols, NP

Andrew Nichols, NP has over 10 years of healthcare experience spanning both military and civilian nursing. Born and raised in Houston, Texas, Andrew brings a sense of community to everything he does, and that same grounded, personal care carries into every patient interaction at Serenity.

Education and Background

Andrew earned his advanced practice degree from Texas State University and pursued specialized training in psychiatric mental health care. He served as a Lieutenant in the U.S. Navy, working as a Critical Care and En Route Care Nurse at Naval Hospital Okinawa and with the 3d Medical Battalion.
He joined Serenity drawn by the practice’s commitment to interventional treatments, including TMS and ketamine therapy, that go beyond conventional options to offer patients real, evidence-based paths forward.

Care Philosophy

Andrew approaches each session by staying present and grounded during even the most difficult moments. He meets every patient with understanding rather than judgment, and with care that is guided by clarity, honesty, and a genuine belief that treatment works best as a collaborative process.

What to Expect

In your first visit, Andrew will take time to understand what has been going on and what matters most to you before anything else. From there, you will build a plan together, one that feels manageable and effective. He listens closely and makes sure nothing important gets missed.

Personal Interests

When Andrew is not with patients, you will likely find him at the gym, reading a book, or practicing mindfulness. His greatest joy, though, is time with his kids, including volunteering at their school where he leads science experiments and happily takes on lunchtime duty.

About Marcus Nielson, PMHNP

Marcus Nielson, PMHNP-BC, is a board-certified psychiatric nurse practitioner at Serenity Mental Health Centers’ Biltmore location in Phoenix, AZ. With over seven years of healthcare experience, Marcus brings expertise in nursing, mental health care, and surgery management to his role. His commitment to holistic, patient-centered care drives his mission to provide personalized treatment plans that integrate advanced therapies with lifestyle modifications.

Marcus believes that mental wellness goes beyond medication alone. His treatment philosophy emphasizes the importance of building a strong foundation through nutrition, sleep, physical activity, and other lifestyle practices. At Serenity, Marcus offers advanced treatments such as Deep Transcranial Magnetic Stimulation (dTMS) therapy and ketamine infusions, alongside meticulous medication management. His goal is to empower patients with the tools they need to take control of their mental health and achieve long-term well-being.

Marcus completed his undergraduate studies at Brigham Young University – Idaho with a Bachelor of Science in Nursing. His clinical experience includes serving as an RN clinical manager at Banner Health, where he led surgical teams, and as an intern at Blue Water Psychiatry, where he gained expertise in psychotherapy and pharmacology.

At Serenity Mental Health Centers, Marcus collaborates with patients to create comprehensive, individualized care plans. His focus is on delivering compassionate care through a combination of the latest evidence-based treatments and lifestyle coaching. Marcus strives to help patients build sustainable mental health habits and achieve a renewed sense of well-being.

In his free time, Marcus enjoys staying active through outdoor activities and exploring new interests. Whether working with new or established patients, Marcus is passionate about offering hope and innovative solutions for mental health care.

Schedule an appointment with Marcus Nielson, PMHNP, today at Serenity Mental Health Centers’ Biltmore location to start your journey toward a healthier, more fulfilling life.