About Us

Why Choose Mentis Clinic USA?

Because You Deserve to Be Heard

We believe that neurodivergent individuals deserve more than just a diagnosis—they deserve understanding, support, and the tools to thrive.

No waitlists – Fast, reliable evaluations without delays.
Thrive & Adapt Programs – Personalized psychoeducation for growth.
Inclusive care – Designed to support each individual’s unique journey.
Expert-led assessments – Conducted by specialists in Adult ADHD and Autism.

A Clinic Built on Purpose

Mission

Our mission is to provide compassionate, evidence-based care that empowers individuals to thrive in their neurodivergence. Guided by the motto “Be Yourself and Be Heard,” we believe everyone deserves recognition, understanding, and support to foster confidence, connection, and personal growth.

Our Commitment

Diagnosis is just the beginning; we prioritize empowerment. Every individual deserves resources and guidance to navigate their journey with confidence. Our personalized psychoeducation programs, like Thrive & Adapt, help harness strengths, overcome challenges, and build meaningful connections beyond clinical care.

Meet Your
Licensed Experts

Meet Your Licensed Experts

Monica Jeffers

Meet
Monica Jeffers

Nurse Practitioner

Monica Jeffers completed the family nurse practitioner program at University of Phoenix in 2012. Her interests are in patient’s optimal health, with a focus on neurodivergent conditions. She has worked in primary care, urgent care, as well as telehealth throughout her career. Monica has lived in the Phoenix metropolitan area for over 40 years and enjoys spending time at home with family and friends.

Tina Greene

Meet
Tina Greene

Patient Coordinator

Tina Greene is an experienced healthcare professional who enjoys helping patients and their families. Having been in the medical field for many years, she believes everyone deserves a brighter tomorrow. Tina is available to answer questions and share information, and she is also here for you to schedule your assessment.

Monica Jeffers

Meet
Dr. Catherine Samuel-Ojo, DNP, APRN, PMHNP-BC

Psychiatric-Mental Health Nurse Practitioner

Dr. Catherine Samuel-Ojo brings more than 32 years of nursing experience to Mentis Clinic USA, including 18 years as a board-certified Nurse Practitioner. She holds triple board certifications — as a Psychiatric-Mental Health Nurse Practitioner, Family Nurse Practitioner, and Geriatric Nurse Practitioner — giving her a broad, whole-person perspective on care that few providers can offer.

Her academic journey spans three countries: she earned her bachelor’s degree from Obafemi Awolowo University in Nigeria, a Master’s degree from the University of Minnesota, and her Doctor of Nursing Practice from the University of Arizona. Along the way, her work has been recognized with several prestigious honors, including the Excellence Award from the West African Health Examination Board for Public Health Nurses and the Mary Opal Wolanin Outstanding Dissertation Award for her research supporting vulnerable populations.

Currently a Primary Care Provider in Family Medicine and Primary Care Integrated Mental Health, Dr. Samuel-Ojo is known for treating the whole person rather than just a diagnosis — combining clinical expertise with genuine warmth. As a faith-driven healthcare leader, she’s passionate about holistic wellness that honors the physical, mental, and spiritual sides of each patient’s journey, helping them feel truly heard and supported every step of the way.

Step into a future where understanding leads to empowerment.

At Mentis Clinic USA, we don’t just assess—we guide, support, and uplift.