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.
Caroline "Callie" Fernandez, MS, PMHNP-BC, APN, is a Columbia University-trained and board-certified psychiatric nurse practitioner with extensive experience in medication management and psychotherapy. She currently treats clients at Peak Interactive Wellness in Denver, Colorado. Callie sees all ages.
While Callie cares for clients across the lifespan, she has additional training in treating children and adolescents and integrates developmental strategies into her client work.
Since focusing solely on medication might only address some of a client's goals, Callie strives to understand the whole individual to tailor unique treatment recommendations. Her approach considers a client's nutrition, physical activity, social patterns, and unique features such as one's cultural identity and background; her own experience shapes this as a 2nd generation Cuban-American.
Callie strives to create a space where clients feel welcome and seen. By prioritizing active, neutral, and non-judgmental listening, she works to build an interactive assessment with the client's help. From this, Callie works with clients to develop a collaborative treatment plan that encompasses their needs, goals, and evidence-based practices.
Bridget Martinson, MA, is a Psychedelic Integration Coach specializing in helping clients seamlessly incorporate their medicine experiences into their daily lives. With a Master's in Counseling and specialized PRATI training, Bridget brings a comprehensive perspective, offering a depth-oriented, person-centered approach tailored to support each individual's unique journey.
Bridget assists clients in finding meaning in and reflecting on any material that surfaced during their journey in a non-ordinary state of consciousness, guiding them towards behavioral changes that integrate these insights into their day-to-day life. This process empowers clients to not only gain understanding but also implement tangible shifts in their behavior and mindset, leading to transformative growth and lasting positive change.
Recognizing the sensitivity surrounding psychedelic experiences, Bridget provides a secure, non-judgmental space where clients can openly express their thoughts, feelings, and revelations. Bridget believes you are the expert of your life. She encourages you to bring your authentic self and journey inward to find the answers and strength you're looking for. Her guidance focuses on unlocking your natural wisdom and potential for personal growth and healing.
In her coaching practice, Bridget places great emphasis on regular self-care for mind, body, and spirit, enabling her to offer support from a place of abundance. Beyond her coaching role, Bridget finds joy in hikes, savoring coffee with a view, exploring new destinations, and reading.
With over 6 years of experience in supporting clients, Bridget has established a reputation for a warm, compassionate, and grounded presence. As a coach, her primary focus is on creating a space where clients feel genuinely seen, heard, understood, and supported.
*Preparatory sessions are also available upon request.
Education and Trainings:
-Masters of Arts in Counseling
-Certified in Foundational Ketamine Assisted Psychotherapy & End of Life / Existential Distress training through the Psychedelic Research and Training Institute
-Completed 30-hour Board Certified Coach Training Program through The Institute for Life Coach Training
As a first-generation American raised in Colorado by immigrant parents from Guyana and Poland—both of whom proudly served in the U.S. military—Oswaldo Grenardo, MD, MBA, MSHA, FAAFP, grew up with a deep respect for accountability, service, and cultural diversity. These early influences, coupled with a desire to improve the healthcare experience for underserved individuals, led him to start his own private practice, OG Health, in Greenwood Village, Colorado.
With over 30 years of experience in family medicine and healthcare leadership, Dr. Grenardo brings a unique blend of compassionate, personalized care and executive-level insight to his patients at OG Health, the practice he founded to reflect his vision of whole-person care. He believes great care begins with a genuine relationship—where patients feel seen, heard, and truly known by their physician.
Dr. Grenardo has held numerous high-impact roles throughout his career, including Chief Medical Officer and Chief Diversity and Inclusion Officer at Centura Health/CommonSpirit Health, Medical Director of its Clinically Integrated Network, and Dean of Admissions at the University of Colorado School of Medicine. His leadership has touched every level of the healthcare system, from clinical integration to medical education and health equity.
A Stanford University graduate with a degree in Human Biology, Dr. Grenardo later earned dual master’s degrees in Business Administration and Health Administration before completing his MD at the University of Colorado School of Medicine. He completed his Family Medicine residency at Rose Medical Center in Denver.
Outside of medicine, Dr. Grenardo is a proud father, sports enthusiast, former Stanford football player, bonsai hobbyist, and certified barbecue judge. He remains active in the community, serving on multiple nonprofit boards, including the American Heart Association Colorado, the Colorado Health Foundation, and the Boys & Girls Clubs of Metro Denver—working to improve health and opportunity across Colorado.
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.
Douglas Hallmark, MD, is an experienced and highly respected family medicine practitioner at Douglas Family Medicine who is delighted to be serving the population of Castle Rock, Colorado, and the surrounding areas.
Dr. Hallmark grew up in Colorado, graduating from Arapahoe High School in Centennial in 1970. He graduated magna cum laude with a degree in Chemistry from Baylor University in Waco, Texas, then pursued his medical degree at the University of Texas Medical Branch (UTMB) in Galveston. Dr. Hallmark graduated from UTMB in 1979 and practiced in East Texas for the next 10 years.
Dr. Hallmark’s life-long desire was to be a small-town family doctor who not only served his patients but developed close relationships with them. He has achieved this goal in his practice of medicine in Castle Rock for the past 20 years, providing exceptional medical care that recognizes the importance of treating every patient as a unique individual. By combining his considerable experience of primary care with the latest advancements in medicine, Dr. Hallmark is able to offer residents of Castle Rock the most up-to-date treatments available with the personal touch of hometown care.
Dr. Hallmark and his wife, Marie, have been married for over 30 years and have six children and one grandson.
Jodie Gahn-Stahley began her health-care career in 1990 as a US Fleet Marine Force Corpsman where she treated Navy and Marine Corps personnel and their families at Camp Pendleton, CA and Naval Medical Center San Diego, CA. After four years, she separated from active duty and continued her military career in the US Naval Reserves supporting Fleet Hospital 23, Field Medical Unit as a combat medical technician.
Jodie grew up in southeastern Wisconsin and attended the University of Wisconsin- Madison for undergraduate training in 1995. While pursuing her degree, she worked as a multi-specialty medical assistant at Dean Medical Center in Madison, Wisconsin. Her physician assistant training was completed at College of Osteopathic Medicine - Des Moines University. Since then, she has been dedicated to providing quality and cost- effective health care in the South Denver Metro area. Her outpatient medical practice spans the pediatric through geriatric
population with a focus on preventative medicine, disease management and urgent care.
In her personal time, she and her husband, John, enjoy a multitude of outdoor adventures whether hiking in the forest or boating and fishing in Colorado's mountain lakes and streams with their two dogs Max and Elke. An aspiring home chef and foodie, Jodie is known to whip up a tasty meal for her family and friends.
“I had put off having a full physical for a bit longer than I should have. After meeting with Gina for a different issue.... I have changed offices!
Gina is a wonderful caring person! I am blessed to have found such a FNP-C. I have and will continue to recommend her, and the office! Everyone at the office is very helpful and pleasant.”
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