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Isaac Melamed, MD

A respected leader in immunology and immune-related disease, Dr. Isaac Melamed has focused on clinical practice and research for over 25 years. Dr. Melamed has published more than 100 papers and presented and lectured in national and international settings. His major concentration is primary and secondary immune deficiency, immune-related disease and the crosstalk between the immune system and the central nervous system. His mission is early intervention to ensure his patients optimal health.

Click HERE to view Dr. Melamed’s CV

Dr. Melamed sees patients at our Centennial, Thornton, and Longmont Clinics.

Kevin O’Brien, MD

Dr. O’Brien is a board-certified allergist/immunologist with 30 years experience specializing in allergies, asthma, immune deficiencies, rashes, eczema, food allergies, chronic sinus infections, low thyroid, and chronic fatigue. He has an interest in the interaction of chronic inflammation brought on by the immune system or allergies or diet leading to worsening symptoms of fatigue and neuroimmune symptoms. He utilizes the latest remedies in food allergies (especially peanut allergies) and eczema (atopic dermatitis) and asthma (the new “biologic” medications).  He has a Master’s Degree in Nutrition and offers recommendations on natural therapy.

Dr. O’Brien sees patients at our Centennial and Thornton Clinics.


Alessandro Testori, MD

Dr. Alessandro Testori is Board Certified in Internal Medicine and has been practicing in Colorado since 2010. Before that Dr. Testori completed a Residency in Internal Medicine at Mercy Hospital in Chicago, IL and a Fellowship in Immunotherapy at Northwestern University. His training during the fellowship included the use of stem cells in medical procedures, and he co-authored several research papers on stem cell transplantation for the treatment of autoimmune disease and critical limb ischemia. He also trained in the immunotherapy of pancreatic cancer, on a clinical trial using the alpha-gal technology developed by NewLink Genetics Corporation, which was one of the early examples of using genetic engineering for creating cancer vaccines for immunotherapy. Dr. Testori holds a Ph.D. In Molecular Biology from the Flinders University of South Australia and continues to have a strong interest in gene therapy and stem cell biology.


Angela McDonald, PA

Angela has practiced as a Physician Assistant since 2004 with IMMUNOe. She has worked in the clinic’s specialties of Allergy, Asthma, Immunology and Primary Care. She has several years working in clinical research and has served as a sub investigator in numerous clinical trials.

Angela McDonald sees patients at our Thornton and Longmont Clinics.


Edan Sarid, MD

Dr. Sarid is a dedicated physician specializing in the practice of adult and pediatric allergy, asthma and immunology. His particular interest is in managing complex immunologic and allergic diseases through the identification and modification of defects in the immune system that cause inflammation. Dr. Sarid began his career in New York as a pediatric hospitalist and urgent care physician and then pursued his life-long interest in allergy, asthma and immunology by completing a subspecialty fellowship at the State University of New York Downstate Medical Center in Brooklyn. There he completed multiple research projects on the long term effects of chronic treatments in immune diseases. After moving to Colorado and joining IMMUNOe Health Centers, Dr. Sarid is utilizing his background in pediatrics and global medicine to provide devoted and passionate care for his patients and for cutting-edge clinical research. Outside of medicine, Dr. Sarid finds leisure in composing and performing his music on the piano as well as discovering Colorado’s beautiful outdoors with his family.

Dr. Sarid sees patients at our Centennial, Green Valley Ranch, Smoky Hill, and Thornton Clinics.

Carly Young

Carly Young, PA-C

Carly Young is originally from Northwest Ohio and completed her undergraduate degree at Ashland University. She received her Master of Medical Science in Physician Assistant Studies from Lincoln Memorial University near Knoxville, TN. Shortly after, she moved to Colorado and began working for IMMUNOe Health Centers in their infusion department. In her spare time Carly enjoys traveling, hiking, playing volleyball, and watching football.

Carly sees patients at our Centennial clinic exclusively at this time.

Erika Guider

Erika Guider, PA-C

Erika Guider, PA-C received her undergraduate degree in Molecular Biology and Microbiology from the University of Central Florida in 2006. Upon receiving her Master of Medical Science degree in Physician Assistant Studies from Nova Southeastern University in 2011, she began her medical career as a Physician Assistant. In addition to being a Certified Physician Assistant, Erika is also BLS certified by the American Heart Association and is a Certified Surgical Technologist.

Erika joined IMMUNOe in July of 2018 and enjoys seeing patients of any age for dermatological services, treatments, and procedures at our Thornton and Green Valley Ranch offices.


dr-murray-3Ronald Murray, MD

Dr. Murray is a Neurologist specializing exclusively in multiple sclerosis. He received his medical degree from the University of Colorado, and was an Intern and Neurology resident at the University of Utah School of Medicine. Prior to joining the faculty at the University of Colorado School of Medicine he completed a fellowship in neurovirology and experimental pathology at the University of Utah and Veterans Administration Medical Center. Dr. Murray has been involved in the field of MS as a researcher, educator, and clinician for nearly 30 years. Dr. Murray has published articles in the fields of neurology and MS and conducted numerous clinical and basic science research projects in MS. Current research is focused on remyelination, new MS therapies and neuroprotection. Prior to starting the Multiple Sclerosis Clinic of Colorado in 2003, he was the President and Medical Director of the Rocky Mountain MS Center (RMMSC). In addition, from 2009 to 2015 he directed an outreach MS clinic in Billings, MT. Dr. Murray is a well-known neurologist in the Western United States for his work in Multiple Sclerosis (MS). He has serves as a Principal Investigator for many of our MS and Alzheimer’s Disease clinical trial studies.

Dr. Murray sees patients at our Centennial Clinic exclusively at this time.

Thomas Stewart, PA-C, JD

Mr. Stewart has been conducting clinical research for the past ten years at both IMMUNOe and the University of Colorado. He is a certified examiner for both MS and Alzheimer’s Disease assessments. In addition to research, he practices at a community clinic, is the Director of Programs and Services for the Rocky Mountain MS Center, disability services advisor, and co-founder of the MS Complimentary and Alternative Medicine Project.


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Edward J. Hepworth, MD

Dr. Hepworth is a Denver Native and a nationally-recognized contributor to the science and clinical practice of endoscopic sinus and skull base surgery.  He believes strongly in a patient-centered approach to sinus care and in the concepts of integrative and team-oriented medicine. Dr. Hepworth strives to engage each patient in a clear understanding of their disease with teaching and open communication.  He is currently working on the development of groundbreaking medical devices to promote minimally invasive treatments in the areas of sinus disease and skull base disorders. Dr. Hepworth’s innovative surgical and non-surgical approach to treatments has earned him global recognition with the world’s eminent leaders in the field.

Curriculum Vitae

Dr. Hepworth sees patients at our Smoky Hill Clinic exclusively at this time.

FullSizeRenderAlison Love, NP

Alison Love is a board certified family nurse practitioner who loves patient care and education. She began her career as a surgical nurse and is a surgical first assistant. The most rewarding part of her career is helping patients recover from surgery, overcome acute and chronic illness, and seeing their quality of life improve. When she is not working with patients, Alison enjoys being outdoors and embracing Colorado’s beautiful scenery.

Alison Love sees patients at our Smoky Hill Clinic exclusively at this time.

Jordan Fisher PA

Jordan Fisher, PA-C

After finishing his undergraduate degree at the University of Colorado, Jordan began his career in medicine working as a medical assistant for Dr. Hepworth and a number of other ENT physicians. From there he attended the University of New England where he earned his Master of Physician Assistant Studies. Upon completion he reunited with Dr. Hepworth to continue in the ENT subspecialty. As a medical assistant Jordan spent every patient encounter educating patients on their diagnosis and treatment. He continues this as a provider with the belief that the provider and patient are a team with the same goal of improving health, and this can only be done if both members have a clear understanding of the disease process. In his spare time Jordan is found mountain biking, rock climbing, or snowboarding as he enjoys his return to Colorado.