Cardiologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Chiropractor providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dentist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dermatologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Family Physician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
OB-GYN providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Ophthalmologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Orthopedic Surgeon providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Pediatrician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Physical Therapist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Podiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Psychiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
I have been working in the occupational health and safety field for 20 years and founded Employee On-Boarding Specialties, LLC after moving to Cheyenne and seeing that there were no occupational focused providers in town. I wanted to provide the best employee care for employers while meeting OSHA and DOT requirements at a reasonable cost. Keeping our workforce healthy is necessary to keep our family and friends safe and healthy as well.
Dr. Crista Day is a board-certified Doctor of Osteopathy whose clinical expertise bridges the breadth of modern family medicine with the depth of functional and integrative care. A graduate of Liberty University College of Osteopathic Medicine, Dr. Day has completed extensive training in primary care, internal medicine, cardiology, pediatrics, obstetrics, geriatrics, emergency medicine, and hospital-based care.
In addition to her osteopathic medical degree, Dr. Day holds certification from The Institute for Functional Medicine (AFMCP), equipping her with advanced tools to identify and treat the root causes of complex, chronic conditions. Her clinical approach blends evidence-based medicine with holistic, patient-centered strategies—ranging from comprehensive diagnostic evaluations to personalized therapeutic interventions. She is also trained in osteopathic manipulative treatment (OMT), using precise, hands-on techniques to correct structural imbalances and support the body’s natural function.
Dr. Day’s passion for medicine was shaped by her own personal health journey. After facing a hereditary autoimmune disease and finding limited success with conventional treatments, she turned to natural and alternative methods—and experienced a complete reversal of her illness. This transformative experience deepened her belief in the body’s innate ability to heal and inspired her to dedicate her career to root-cause medicine.
Guided by the core tenets of osteopathic philosophy, Dr. Day’s approach is founded on four key principles:
-The Body is a Unit – Health encompasses the integration of mind, body, and spirit.
-The Body is Capable of Self-Healing – When supported properly, the body’s natural intelligence restores balance and wellness.
-Structure and Function are Interrelated – Physical alignment directly influences physiological performance.
-Rational Treatment is Based on These Principles – Effective care addresses underlying dysfunctions through non-invasive, holistic methods.
Rather than masking symptoms or relying prematurely on pharmaceuticals or surgery, Dr. Day focuses on uncovering and correcting the underlying imbalances—whether nutritional, toxic, emotional, or structural—that impede healing. While she recognizes the essential role of conventional medicine in acute and emergency care, her experience affirms that functional and holistic approaches often offer the most powerful and lasting results for chronic illness and long-term wellness.
Dr. Day’s professional achievements include recognition as Science Student of the Year (2010) at Tri-County Technical College and induction into Alpha Sigma Lambda, honoring her academic excellence and leadership. Beyond clinical practice, she has served as a visiting professor of Nutrition and Exercise Science, teaching courses in sports nutrition and motor learning.
Known for her thoroughness, empathy, and unwavering dedication, Dr. Day partners with each patient to develop individualized, sustainable treatment plans that support optimal health, longevity, and vitality.
Dr. Jonathan W. Singer is a board-certified osteopathic physician whose pioneering approach bridges the best of traditional, holistic, and functional medicine. As the founder and lead physician at HealthFirst in Cheyenne, Wyoming, Dr. Singer has dedicated his career to helping patients uncover the root causes of illness and achieve lasting, whole-body wellness.
Dr. Singer earned both his bachelor’s and master’s degrees in Food Chemistry from the University of Wisconsin–Madison, where his passion for science and natural health first took shape. During his graduate studies, he developed a natural alternative to the synthetic food colorant Yellow No. 5—a discovery now widely used in the food industry.
He went on to graduate with honors from the College of Osteopathic Medicine in Des Moines, Iowa, and became one of the first physicians in the United States to earn board certification in holistic medicine. As part of this pioneering group, Dr. Singer helped establish many of the foundational scientific standards that shaped modern integrative and alternative medicine.
Dr. Singer is board-certified in Family Practice and Holistic Medicine and board eligible in Medical Acupuncture, Homeopathy, and Environmental Medicine. His expertise spans preventive care, chronic disease management, detoxification, and mind-body medicine.
Throughout his distinguished career, Dr. Singer has been an active member and leader in numerous professional organizations, including the American Osteopathic Association, American Medical Association, American Academy of Family Physicians, and American College for Advancement in Medicine. He has served as a national delegate to both the American Osteopathic Association and the American College of Osteopathic Family Physicians, and is a past president of the Wyoming Osteopathic Medical Society as well as a past member of the American Academy of Environmental Medicine.
Patients from across the country and around the world travel to HealthFirst in Cheyenne to seek Dr. Singer’s expertise, especially when conventional treatments have failed to bring relief. Many describe finding renewed hope and health under his care after years of searching for answers.
At HealthFirst, Dr. Singer offers natural and restorative therapies whenever possible, while recognizing that medications may play an important role when appropriate. His integrative approach includes acupuncture, neurofeedback, nutrient IV infusions, targeted injections, and nutrition counseling, as well as advanced medical treatments such as chelation therapy, bioidentical hormone replacement, ozone therapy, and SuboxoneⓇ treatment for addiction recovery.
HealthFirst operates as a direct-pay (cash-based) practice, allowing Dr. Singer to provide individualized, high-quality care—free from the limitations imposed by insurance companies. This model ensures that every patient receives thoughtful, evidence-based, and compassionate treatment focused solely on their health and healing.
With decades of experience and an unwavering commitment to patient well-being, Dr. Jonathan Singer continues to lead with innovation, empathy, and integrity—helping individuals reclaim their health and live vibrant, balanced lives.
Evelyn Hu is a Family Nurse Practitioner in Colorado who focuses on Family Practice and Primary Care. She founded MedPhone Rx in a mission to provide services to remote patients all over the State of Colorado.
She and the providers of MedPhone Rx can perform face to face video consultations when your doctor is not available, see you at designated local clinics when personal contact is necessary, and even do home visits when possible!
Evelyn began practicing as an FNP-BC for 6 years as a primary care provider and 4 years in Urgent Care. She's served as Director of Nursing in California. Before coming to the U.S., Evelyn practiced as a medical doctor in Asia for 12 years.
I have been working in the occupational health and safety field for 20 years and founded Employee On-Boarding Specialties, LLC after moving to Cheyenne and seeing that there were no occupational focused providers in town. I wanted to provide the best employee care for employers while meeting OSHA and DOT requirements at a reasonable cost. Keeping our workforce healthy is necessary to keep our family and friends safe and healthy as well.
