Kathryn Montierth
Specialties
Bio
Kathryn Montierth is a board-certified psychiatric-mental health nurse practitioner (PMHNP-BC) who provides psychiatric evaluations and medication management by telehealth for adolescents 13 and older and adults throughout Arizona. She practices through Yarrow Behavioral Health, her solo practice, so clients work directly with her at every visit.
Her clinical focus includes ADHD, anxiety, depression, bipolar disorder, and OCD medication management, along with trauma-related symptoms, diagnostic clarification, and medication problem-solving. She came to psychiatric practice after 14 years as a registered nurse, with experience in psychiatric crisis care, inpatient psychiatry, neurology, and complex medical care, and that background shapes how she approaches each evaluation.
Mental health concerns rarely exist in isolation.
Kathryn’s approach emphasizes careful assessment, clear medication discussions, and shared treatment decisions. She describes her style as warm and supportive, and she takes the time to explain her reasoning so that clients understand their options and have a real voice in their care, working from a trauma-informed perspective throughout.
Her services are psychiatric evaluation and medication management; she does not provide ongoing psychotherapy. For clients who are also in therapy, she coordinates with their therapist when the client has authorized it, which makes her a natural partner for clinicians who want a prescriber on the team. Kathryn earned her Master of Science in Nursing from Walden University and is board certified through the American Nurses Credentialing Center. Insurance appointments are arranged through Headway, and self-pay appointments are available through the practice’s secure SimplePractice portal; current appointment options are listed on the practice’s booking page.
Therapeutic Approach
- Careful, thorough assessment before any medication decision, including diagnostic clarification when the picture is unclear
- Clear medication discussions, so you understand the options, the reasoning, and what to expect
- Shared treatment decisions, with your input shaping the plan rather than simply being informed of it
- Seeing mental health in context, drawing on 14 years of nursing across psychiatric and medical settings
- Coordinating with your therapist when you authorize it, so medication care and therapy work together
Contact
Education
Licenses & Certifications
Rates
Kathryn is in-network through Headway with Aetna, Blue Cross Blue Shield, Carelon Behavioral Health, Cigna and Evernorth, Curative, Optum, Oscar Health, Oxford, Providence, and UnitedHealthcare. Insurance appointments are booked through Headway, which verifies plan eligibility and benefits and provides an estimated cost before the visit. Self-pay appointments are requested through the practice’s secure SimplePractice portal. Self-pay clients pay by credit or debit card (American Express, Discover, Mastercard, Visa), and a Good Faith Estimate is provided for self-pay care. Current appointment options for both insurance and self-pay visits are listed on the practice’s booking page. Contact the practice to verify current fees, coverage, and availability before scheduling.