Lillian Klancar, MD
I speak: English
My gender: Female
Where I practice
About me
I was born and raised in Cincinnati, Ohio, and graduated from The Ohio State University. Drawn to Colorado for its beauty and abundance of outdoor activities, I knew early on that I loved caring for people—and medicine became a natural extension of that passion.
Before attending medical school, I worked as a physical therapist for 6 years, gaining experience in hospital and home care, sports medicine, and occupational medicine. I then earned my medical degree from the University of Colorado Denver, where I also completed my residency and served as a clinical instructor in Internal Medicine Oncology. My fellowship training was split between the University of Colorado and the University of Alabama at Birmingham.
I am proud to be both a dedicated physician and mother to 2 daughters. The most rewarding part of my profession is building meaningful relationships with people from all cultures and backgrounds and helping them live as fully and comfortably as possible.
About my practice
My goal is to provide the highest quality, evidence-based care—whether that involves standard treatment or participation in a clinical trial. Equally important is building a partnership with each patient to ensure their treatment plan reflects their individual needs, values, and goals.
My Cancer Subspecialty Focus
My areas of clinical focus include neuroendocrine, melanoma, gastrointestinal, breast, lung, hematologic, head and neck malignancies, and benign hematology.
Collaboration on Multidisciplinary Teams
I work closely with multidisciplinary teams composed of experts in medical oncology, hematology, radiation oncology, surgery, pathology, and other specialties. I partner with a dedicated nurse care coordinator who provides consistent communication and support for every patient.
I value my patients as partners in their care and listen closely to their questions and concerns. Our extensive collaboration with oncologists and specialists enables truly comprehensive care. I also connect patients with supportive services such as palliative care, dietary coaching, rehabilitation therapies, counseling, social work, and financial counseling to help address the whole person.
Research & Clinical Trials Involvement
I participate in several National Cancer Institute–supported research networks, including the SWOG Cancer Research Network, National Surgical Adjuvant Breast and Bowel Project (NSABP), Alliance for Clinical Trials in Oncology, and NRG Oncology. As a sub-investigator on multiple clinical trials, I am committed to advancing cancer care through innovative research and expanding access to promising new therapies within Kaiser Permanente.
How I thrive
My hobbies include nearly anything that involves the mountains—cycling (both road and mountain), skiing, snowshoeing, hiking, ice skating, or simply taking in Colorado’s natural beauty. I have a passion for integrating complementary medicine into traditional care and was a co-founder and board member of the nonprofit Colorado Cancer Initiative.
Medical groups and plans
Colorado Permanente Medical Group
Lone Tree Medical Offices
Contact information
- Appointments/Cancellations/Information
- 303-338-4545
- Appointments/Cancellations/Information
- 1-800-218-1059 (toll free)
- TTY
- 711 (TTY for the hearing/speech impaired)
Hours:
- This location offers extended weekday hours.
- This location offers weekend hours.
Please call the office directly for information regarding hours.
Languages spoken by front-office staff:
EnglishPlans accepting new patients
- Child Health Plan Plus (CHP+)
- Colorado HMO/EPO
- KP Select
- Kaiser Permanente Colorado Option for Individual & Family
- Kaiser Permanente Colorado Option for Small Group
- Medicare-Denver Boulder
- Medicare-Northern Colorado
- Medicare-Southern Colorado
- Medicare/Medicaid Dual-Enrolled
Indicates if the clinician’s office/facility has accommodations for people with physical disabilities, including offices, exam room(s), and equipment.
My training, certifications & licensing
Medical school
University of Colorado Health Sciences CenterBoard certification
Oncology
Am Bd of Internal MedicineTo verify board certification for an individual practitioner, please visit the American Board of Medical Specialties, the American Medical Association, or the American Osteopathic Association websites.
Medical training
Fellowship
Internal Medicine
University of Colorado Health Sciences CtrResidency
Internal Medicine
University of Colorado Health Sciences CtrJoined Permanente Medical Group
2014Provider ID
781497My hospitals
This information is not available at this time.
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This page was last updated on: 11/06/2025