Convenient Home Testing
Experience the ease and convenience of testing from the comfort of your home. No need for office visits—enjoy personalized care without the hassle.
Nathan Holtzman, MSN,PMHNP-BC,ADHD-CCSP
Psychiatric-Mental Health Nurse Practitioner, Board Certified
ADHD-Certified Clinical Service Provider (ADHD-CCSP)
Meet our Board Certified Psychiatric Mental Health Nurse Practitioner here at Momentum Health. With over 17 years of expertise, specializing in depression, anxiety, ADHD, bipolar disorder, PTSD, and insomnia, this professional brings knowledge and compassion to mental health care. Nathan has a deep passion for psychopharmacology and has completed the Neuroscience Education Institute’s Master Psychopharmacology Program.
He also holds the ADHD Certified Clinical Service Provider (ADHD-CCSP) credential, reflecting his commitment to evidence-based, personalized, and innovative mental health care.
Julia Russell, MSN, PMHNP-BC
Psychiatric-Mental Health Nurse Practitioner, Board Certified
Julia is currently pursuing her Doctorate in Nursing Practice (DNP), building upon her extensive background of over 24 years in healthcare. She specializes in adult mental health, with a focus on anxiety, ADHD, OCD, depression, PTSD, memory loss, trauma, and geriatric care. Throughout her career, Julia has served as a Director of Nursing in multiple settings, including acute care, long-term care, memory units, and assisted living facilities. She was recognized as Nurse of the Year in 2010 for her outstanding leadership in long-term care. Julia’s approach emphasizes patient-centered care, compassion, and the development of strong therapeutic relationships to promote meaningful and lasting healing.
Yuka Al-Matti, MSN, PMHNP-BC
Psychiatric-Mental Health Nurse Practitioner, Board Certified
With over 13 years of experience in both behavioral and medical health, Yuka specializes in adult mental health, with expertise in ADHD, anxiety, depression, bipolar disorder, PTSD, mood disorders, and trauma. She holds a Bachelor’s degree in Psychology, a Bachelor’s degree in Nursing, and a Master’s degree as a Psychiatric Mental Health Nurse Practitioner. Yuka also brings a global perspective to her practice, having volunteered extensively in Guatemala, China, and Japan, and is bilingual in Japanese and English. Yuka is passionate about providing culturally sensitive, individualized care through a combination of medication management and psychotherapy, emphasizing long-term therapeutic relationships and overall patient well-being.
Megan Presley, MSN, PMHNP-BC
Psychiatric-Mental Health Nurse Practitioner, Board Certified
With over 20 years of experience in healthcare—including roles as a Certified Nursing Assistant, U.S. Army-trained Licensed Practical Nurse (LPN), and Registered Nurse (RN)—Megan specializes in treating both pediatric and adult clients. Her expertise spans inpatient psychiatry, telepsychiatry, eating disorder treatment, hospice care, school nursing, and dementia behavioral care. Megan is currently obtaining her Pediatric Mental Health Specialist Certification, further enhancing her ability to provide compassionate and developmentally informed care. Her approach is collaborative and individualized, focusing on creating a supportive space where clients can explore and achieve their mental health goals.
Francis Serdenia, MSN, PMHNP-BC
Psychiatric-Mental Health Nurse Practitioner, Board Certified
With over 15 years of experience in psychiatric care across various behavioral health facilities in Arizona, Francis specializes in treating depression, anxiety, trauma, mood disorders, ADHD, phobias, and OCD. He provides care for both pediatric and adult clients, tailoring his approach to meet the unique needs of each individual. Francis’ holistic and compassionate approach places strong emphasis on fostering a collaborative relationship with patients to help them achieve their treatment goals. His dedication to reducing the stigma surrounding mental health drives his commitment to providing accessible, understanding, and effective psychiatric care.
Stella Abaaba, MSN, PMHNP-BC
Psychiatric-Mental Health Nurse Practitioner, Board Certified
With a deep commitment to delivering compassionate, holistic, and culturally sensitive care, Stella specializes in treating adult clients. Her background in both medical-surgical and psychiatric nursing allows her to approach mental health with a comprehensive understanding of the biological, psychological, social, and cultural dimensions. Stella advocates for equity in mental health care, focusing on supporting vulnerable populations, including immigrants, communities of color, and those with co-occurring disorders.
