Meet our psychiatrists & mental health providers.

Board-certified psychiatrists, nurse practitioners, and medical professionals dedicated to your mental health.

Licensed in Kansas & Missouri

Francis Okafor, PMHNP-BC

NP Okafor served as a National Guard medic before pursuing psychiatric nursing. He listens and respects patients who are struggling with conditions like depression, anxiety, and bipolar disorder.

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Patrick Wambugu, PMHNP-BC

NP Wambugu graduated from the University of Missouri-Kansas City and later earned a Doctorate in Behavioral Health, specializing in addiction, ADHD, and anxiety. He focuses on enhancing your happiness and overall wellness.

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Charise Marti, PMHNP-BC

NP Marti has 20+ years of nursing experience, including ICU, ER, and geriatric psychiatry. She earned her master’s from Maryville University of St. Louis and specializes in dementia, schizophrenia, and bipolar disorder.

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Mandy Yates, PMHNP-BC

NP Yates is skilled in managing complex psychiatric cases as well as common conditions like ADHD, depression, and anxiety. She earned her master’s from the University of Missouri-Kansas City.

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Nghia Nguyen, PMHNP-BC

NP Nguyen has 15+ years of experience. He earned his master’s from the University of Missouri-Kansas City. Fluent in Vietnamese, NP Nguyen focuses on personalized, evidence-based care for adults.

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Joyce Njuguna, PMHNP-BC

NP Njuguna has 15 years of psychiatric nursing experience treating depression, anxiety, ADHD, bipolar disorder, and substance use. She earned her master’s from Maryville University of St. Louis.

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David Willey, MD

Dr. Willey has decades of expertise in addiction recovery, starting with a fellowship at the University of Kansas Medical Center. He provides compassionate care for substance use, anxiety, and depression.

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Dr. JP Martell, psychiatrist at Silver Arrow Psychiatric Care
JP Martell, MD

Dr. Martell completed his addiction psychiatry fellowship at Yale and residency at the University of Kansas. He treats substance use, anxiety, depression, and more in both English and Spanish.

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Todd Mekles, MD

Dr. Mekles cofounded Silver Arrow Psychiatric Care to improve mental health across Missouri and Kansas. A graduate of the University of Kansas Medical Center, he’s a respected expert in diverse psychiatric conditions.

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Why patients choose Silver Arrow Psychiatric Care

Compassionate providers

With years of expertise, our team helps you find effective solutions faster, so you can feel better sooner.

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