Dr. Darrell Kilcup Functional Medicine & Hyperbaric Center

Dr. K is an outstanding functional medicine doctor. I have seen him for about 10 years now, moved out of state 5 years ago and have continued care under him remotely. He is extremely knowledgeable, responsive, and goes above and beyond addressing questions or concerns. He truly cares about the health and well being of his patients and has earned my complete trust over the years. I would definitely recommend him to anyone searching for answers on how to feel better, get healthier naturally and increase your chances of living longer!

Mark Davis · March 3rd, 2026

Finally a Doctor who listens and delivers real results for my daughter complex health issues! From our very first virtual consult (super convenient since we live about an hour away - his telemedicine option works anywhere), he took the time to dive deep into her full history, symptoms, and even lifestyle factors we hadn't considered. No rushing, no cookie-cutter plans—just thoughtful, personalized strategies that addressed the *why* behind her issues, not just the what. After just a few months on his treatment plan, we've seen game-changing improvements: her energy levels are up, the gut pain has nearly vanished, and she even started working full-time; something that was impossible a few months ago.. For the first time in years, she's excited about activities she used to love, without the constant drag of feeling unwell. As a parent, it's heartbreaking to watch your child struggle, but Dr. Kilcup didn't just treat her—he empowered our whole family with education and tools to support her long-term wellness. His office in Phoenix is welcoming and efficient, with a team that's kind and attentive. If you're tired of dead-end appointments and ready for a doctor who actually cares about getting to the root of things, look no further. Dr. Kilcup isn't just skilled—he's compassionate, thorough, and genuinely invested in your success. He's the only one who's truly helped us, and we'll be forever grateful. Highly recommend to any family dealing with mysterious or chronic health problems. Thank you Dr Kilcup and staff! Sincerely the Lopezes

Letty Lopez · November 5th, 2025

Dr.Kilcup and his team were amazing! Facility was well organized and kept clean. Staff was super friendly. With the Red light session your body is completely exposed to the red light head to toe, front to back. The HBOT was also amazing, with two options laying down or sitting.

Brady Salinas · December 31st, 2025