Boulder Medical Center Physicians Named 5280 Top Doctors for 2026
August 18, 2026 | 2 min read

Boulder Medical Center is proud to recognize seven physicians named to 5280 magazine’s 2026 list of Top Doctors, an annual recognition of outstanding physicians across more than 80 medical specialties in the Denver metro area.
Five BMC physicians have earned the recognition for four consecutive years, while two BMC pediatricians have been named to the list for the first time in 2026.
The 2026 Top Doctors were selected through a process conducted in partnership with Castle Connolly, a health care research and information company with more than 30 years of experience evaluating physicians nationwide.
Unlike many consumer-based awards, the Top Doctors selection process begins with nominations from fellow physicians. Castle Connolly’s physician-led research team then evaluates nominees based on factors including education and training, professional reputation, hospital and faculty appointments, research leadership, disciplinary history, and outcomes data. The review also considers qualities important to the patient experience, including communication, empathy, listening, and the ability to build trust.
Boulder Medical Center’s 2026 Top Doctors
The following BMC physicians have been recognized by 5280:
- Karen Andrews, MD — Allergy, Asthma & Immunology
Named a 5280 Top Doctor in 2023, 2024, 2025, and 2026 - Harold Johnson, MD — Family Medicine
Named a 5280 Top Doctor in 2023, 2024, 2025, and 2026 - Krista Toomre, MD — Family Medicine
Named a 5280 Top Doctor in 2023, 2024, 2025, and 2026 - Robert Levine, MD — Gastroenterology
Named a 5280 Top Doctor in 2023, 2024, 2025, and 2026 - Stephen Siegel, MD — Urology
Named a 5280 Top Doctor in 2023, 2024, 2025, and 2026 - Cheryl Cavanaugh, MD — Pediatrics
Named a 5280 Top Doctor for the first time in 2026 - Melissa Serlen, MD — Pediatrics
Named a 5280 Top Doctor for the first time in 2026
BMC congratulates these physicians on this recognition from their peers and their continued commitment to providing high-quality care to patients throughout Boulder County and the surrounding communities.