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2851 N. Tenaya Way, Suite 205 Las Vegas, NV 89128
(702) 289-4974

2440 W. Horizon Ridge Pkwy, Suite 100 Henderson, NV 89052
(702) 990-9169

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Meet the Team

As functional medicine practitioners, we employ an integrated approach to your condition. Our team includes a medical doctor, a naturopathic physician, and a chiropractic physician. Click on any of the pictures below to meet your doctors.

Dr. Mitchel E. Phillips, D.O.

Dr. Phillips is a 1976 graduate of the College of Osteopathic Medicine and Surgery in Des Moines, Iowa. He completed his medical training while serving in the United States Air Force and has been practicing for over 20 years in Las Vegas with a special interest in aging management, bio-identical hormone therapy, risk factor reduction, lifestyle management and rejuvenation.

He is board certified in Family Practice, Pain Management, and Anti-Aging medicine.

Jessica Cooks FNP-BC - ANCC Board Certified Family Nurse Practitioner

Jessica Cooks FNP-BC

Born and raised in Chicago, IL, Jessica Cooks has always had a passion for helping others. Being goal oriented and success driven, Jessica started her nursing career as a Licensed Practical Nurse in 2006, and worked hard to advance her career to a Registered Nurse with an Associate’s and Bachelor’s Degree in Nursing. In 2018 she accepted a travel nurse assignment in Las Vegas, NV and loved the city enough to stay. She later completed her Master’s Degree in Nursing, with a focus as a Family Nurse Practitioner. During her time as a bedside nurse, Jessica has been consistent with providing high quality care to patients in a variety of settings, including skilled nursing facilities, assisted living facilities, medical surgical acute care units and home care. She is dedicated to delivering excellent patient experiences and giving equally safe and effective healthcare services to patients of all backgrounds.

Dr. Ian Yamane, D.C., I.F.M.C.P. - Functional Medicine and Nutrition, Director of Admissions

Dr. Ian Yamane grew up in a small community in San Diego County. At home, his mother battled illness for over 20 years. He witnessed a high spirited woman who was held back by a sick body and was relegated to her bed. She had no vitality and was always sick. He watched his father pick up the slack in the household to care for his sick wife while working full time and raising a family. It was painful for Dr. Yamane to experience his parents return each time from a doctor's visit as he had high hopes that the large bag of pills would somehow cure her. At times there were some glimpses of hope that she was cured, yet gradually over time she would end up right back in bed. Unfortunately, after visiting with many of the top healthcare specialists she passed away at a premature age. From that moment on, Dr. Yamane had a burning desire to start his journey in finding a way to help people with chronic and difficult to treat conditions. His desire for all families to enjoy optimal health drives his research and development of patient care so that no individual within families will have to suffer the same life-long debilitating heath that held back his family from the joy they could have had.

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Dr. Sef Tritt, ND - Naturopathic Doctor

Dr. Tritt

Sef Tritt, ND is a Naturopathic Doctor trained at Bastyr University in San Diego, CA. Dr. Tritt completed a Bachelor of Science in Biology from New York Institute of Technology, graduating Summa Cum Laude. During medical school, she was an active participant of several student organizations, including Student Government Association.

Sef has always had a love for nature and medicine starting at an early age. Before attending medical school, Dr. Tritt worked as a Veterinary Technician, where she found her love for medicine. It was her love for kinesthetics, established through education of dance and exercise science, created a passion for healing through a more integrative approach of body, mind, and spirit. Through her own health journey, and those of her loved-one, she found naturopathic medicine and it felt like home.

Dr. Tritt specializes in hormones, fitness and weight loss combining naturopathic, conventional, and regenerative therapies to obtain the best possible results. To better assist patients reach their goals, Dr. Tritt individualizes all treatments and protocols to suit their needs, since she believes that as are we all are unique individuals, our treatment should be too.

When not working hard to help her patients find balance, Sef enjoys reading, spending time at the beach and outdoors, throwing some weights, dancing, or non-guiltily binge watching series or movies.

Jessica Zadeh, MS, CHC, HNC - Nutritionist/Health & Wellness Coach

Jessica Zadeh, MS, CHC, HNC

Jessica is a Certified Holistic Nutritionist, Health & Wellness Coach specializing in Functional Nutrition, chronic health conditions, gut, hormonal & adrenal issues, inflammation & sustainable weight loss. Jessica believes in realistic & maintainable wellness (as everyone should indulge once in a while)!

Jessica's goal is to always meet clients where they're at in the moment so that she can assist not only in attaining goals but also with learning to actually enjoy the process. Jessica enjoys connecting with clients on a personal level most importantly because she's been there herself and knows that the wellness journey is one traveled far easier with a guiding and helpful hand

Tracey - Office Administrator

Every day I get to come to work knowing we are making a difference! I love functional medicine and all that is stands for. Healing people at a cellular level and helping the body heal itself is amazing. I have seen our Valhalla Team help 100s of patients over the years. We have a Team that truly does care about patients and wants to help them be their best self!

When I am not working, I enjoy spending time with my husband, kids, mom, friends and dogs. I also have 2 grandchildren that I adore and love to spend time with! I love golfing! Being out on the golf course is so relaxing, even when I am playing bad!

Brooke - Guest Specialist

I started becoming intrigued with functional medicine after my sister was diagnosed with brain cancer. I saw what prescription medication did to her and how it affected her children, her husband and the rest of our family. We all started slowly changing our lifestyle. We’ve seen improvement and it’s the best feeling in the world.

My husband, children and I recently moved to Las Vegas from Hawaii. Going to the beach used to be something we did almost every weekend. Now that we don’t have the beach, we find ourselves at the parks a lot. I enjoy spending time, outdoors, with my family.

Angela

Angela

I have worked in retail customer service at a craft store for many years. I liked helping people with their design and creativity ideas. I felt I had made a difference in their lives even just a little.

I became part of the Valhalla Wellness Family in late January of 2022. It was my first time working in a medical office, and I didn’t know much about Functional Medicine. While working at Valhalla, I have learned more about Functional medicine. I found myself enjoying working with patients and hearing the great things that Dr. Yamane has done for them. I, myself have started my personal healing here at Valhalla.

I have two little ones at home who I spend all my off time with. I enjoy sewing, crafting, and making things for my little ones. When I have the time, I enjoy watching movies, reading books, gaming and a playing a little Dungeons & Dragons.

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