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73 providers
Availability last updated 01/27/2026
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.
Dr. Oswaldo Grenardo, MD, MBA, MS
Family Physician
385 Inverness Pkwy
Ste 130
Greenwood Village, CO 80112
Medical School: Loyola University Stritch School of Medicine – Chicago, IL
Internal Medicine: Exempla St. Joseph Hospital – Denver, CO
Diagnostic Radiology: University of Colorado – Aurora, CO
Interventional Radiology: Medical College of Wisconsin – Milwaukee, WI
American Board of Radiology 2016
Tony Brown, MD, is the Medical Director and a board-certified vascular and interventional radiologist specializing in pelvic stabilization and kyphoplasty at RIA Endovascular. Dr. Brown sees patients at the practice's location in Greenwood Village, Colorado.
He pursued medical school at Loyola University Stritch School of Medicine in Chicago, Illinois, followed by an internship in Internal Medicine at Exempla St. Joseph Hospital in Denver, Colorado, and a residency in Diagnostic Radiology at the University of Colorado in Aurora.
Dr. Brown completed his fellowship in Interventional Radiology at the Medical College of Wisconsin in Milwaukee.
He has contributed to a number of publications and presentations, such as:
In 2016, Dr. Brown obtained board certification from the American Board of Radiology (ABR).
He is committed to caring for patients at RIA Endovascular and truly provides exceptional care.
Dr. Anthony Brown, MD
Radiologist
8200 E Belleview Ave
Suite 600E, East Tower
Greenwood Village, CO 80111
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Nationally Board Certified
Physician Assistant
Heather Whiting is a native of Colorado and has been fortunate to serve the community as a physician assistant and patient care advocate since 2003.
She began her pursuit of a career in medicine at the University of Northern Colorado where she earned a Bachelors and a Masters degree in Human Biology. Upon graduation, Heather worked at the University of Colorado Hospital as a Rehab Therapy Technician. She later graduated from the Physician Assistant program at Red Rocks Community College in Lakewood, Colorado with honors and earned a second Master’s degree, a Masters of Medical Science from Saint Francis University.
Heather is very passionate about medicine and believes in caring for the whole patient. She enjoys working side by side with patients striving to achieve optimal physical and emotional health. She is experienced in treating patients across a wide spectrum of disease states and ages, from adolescence to geriatrics. She has special interest in disease prevention and health promotion.
Heather loves spending time with her husband and two sons. They enjoy the beautiful Rocky Mountains, camping, hiking, biking, and snowboarding.
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Heather Whiting, PAC
Family Physician
5420 South Quebec Street
Suite 100
Greenwood Village, CO 80111
Nicole Sheeder, FNP
Family Physician
8100 E Union Ave
#104
Denver, CO 80237
Dr. Claire Hardin, DNP, FNP-C, is a highly skilled family nurse practitioner at P2 Wellness in locations in both Parker and Lakewood, Colorado.
She began her impressive career in emergency medicine at Yale New Haven Health in Connecticut, where she honed her skills as a bedside nurse and critical care specialist for eight years. She earned her nursing degree from Yale University followed by a Doctorate in Nursing Practice (DNP) from Quinnipiac University in Connecticut.
Claire’s dedication to patient care led her to pursue a fellowship in emergency medicine and child abuse, where she received the prestigious Trewin Award for leadership and became a health policy fellow advocating for patient rights.
With a passion for global health, Claire has worked and taught healthcare in diverse settings across Nepal, Haiti, Uganda, and Nicaragua. In 2018, she relocated to Colorado and joined Children’s Hospital Colorado in the emergency department, followed by roles in an IV infusion center and a family health clinic. Claire is now thrilled to bring her expertise in continuity of care to P2 Wellness, where she emphasizes the importance of holistic patient care and precision based medicine.
With over 15 years in healthcare, Claire deeply values the patient-provider relationship. She credits both her parents, who are dedicated healthcare professionals, for instilling in her the importance of compassionate patient care.
Outside of her professional life, Claire enjoys hiking with her three dogs, practicing yoga, and cooking with her husband. She remains close to her East Coast family, who continue to inspire her in her work.
Mrs. Claire Hardin, NP
Nurse Practitioner
10100 Twenty Mile Road
114
Parker, CO 80134
Dr. Analice Hoffenberg, MD, MSPH
Family Physician
1780 S. Bellaire St.
302
Denver, CO 80222
Caroline Gellrick, MD
Family Physician
1776 S Jackson St #840
Denver, CO 80210
Leah Jones, NP
Family Physician
125 Rampart Way
Ste 300
Denver, CO 80230
Rosemary Andrianakos
Family Physician
4545 E 9th Ave Ste 300
Denver, CO 80220
Dana Nelson, NP
Family Physician
710 E Speer Blvd
Denver, CO 80203
Val has over 14 years of healthcare and management experience. She spent nine years working as Practice Administrator and Billing Supervisor of a well-established Ophthalmology and Optometry practice. As Magnolia Medical Group's Director of Operations, she works closely with medical providers, counselors, psychiatrists, laboratory staff, medical assistants, and clinic administration staff to consistently develop and nurture a clinic atmosphere that is beneficial and conducive to helping those in recovery. Val has been with Magnolia Medical Group since May of 2021.
Val is a Colorado Native who lives with her husband and their two children. She enjoys camping, hiking, paddle boarding, and most other outdoor activities. She is also an avid reader, so if you ever need a good book recommendation, she's your girl! Val attended Colorado State University to complete a bachelor's degree in Organizational Leadership.
Valerie Lavoie, AGNP
Nurse Practitioner
2925 E. Colfax Ave.
Denver, CO 80206
Pradeep Raj Rai, MD, FASAM, is a board-certified medical doctor and a Fellow of the American Society of Medicine. He is the medical director at Magnolia Medical Group, with locations in Denver and Wheat Ridge, Colorado, and he is board-certified in addiction medicine to offer the highest-quality care to every patient he sees.
Dr. Rai received his bachelor’s degree in cellular and molecular biology from Tulane University in New Orleans, Louisiana, before going on to earn his medical degree. After working for several years in the field of addiction medicine, he founded Magnolia Medical Group to provide the residents of Colorado with resources for addiction that combine behavioral health solutions alongside effective medical care.
Dr. Rai has experience in the many forms of addiction medicine and an unceasing dedication to making a positive impact on the lives of his clients and their families.
He welcomes anyone in need of help to Magnolia Medical Group, where they can expect comprehensive, nonjudgmental treatment in a safe and compassionate environment.
Pradeep Rai, MD
Surgeon
2925 E. Colfax Ave.
Denver, CO 80206
