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  • Hematology, Internal Medicine, Oncology
  • Accepting new patients
  • 25 years of experience
  • Rocky Mountain Cancer Centers - Longmont 1760 E Ken Pratt Blvd Ste 302, Longmont, CO 80504
  • (303) 684-1900

Brief Intro

J. Mark Barnett, MD, is a board-certified medical oncologist with Rocky Mountain Cancer Centers, providing comprehensive cancer care in the Longmont area. Dr. Barnett attended medical school at Southern Illinois University School of Medicine in Edwardsville, IL. His specialties are Medical Oncology, Breast Cancer, Gastrointestinal Cancer, Genitourinary Cancers and Lymphoma. Dr. Barnett is part of a team of over 50 physicians at RMCC providing advanced cancer care in communities across the state. He collaborates with specialists in all areas of cancer diagnostics and treatment including medical oncology, radiation therapy, surgery, immunotherapy, genetic testing, clinical trials and supportive care to offer patients a coordinated and comprehensive care plan. As an additional strength, RMCC is part of The US Oncology Network, one of the nation's largest networks of integrated community-based oncology practices dedicated to advancing high-quality, evidence-based patient care.

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Education Background

MEDICAL SCHOOL

Southern Illinois Univ School of Medicine - 2000

Languages Spoken

  • English

Location & Hours

  • 1760 E Ken Pratt Blvd Ste 302, Longmont, CO 80504
  • Mon:7:30 am - 4:30 pm
    Tue:7:30 am - 4:30 pm
    Wed:7:30 am - 4:30 pm
    Thu:7:30 am - 4:30 pm
    Fri:7:30 am - 4:30 pm
    Sat:Closed
    Sun:Closed

Specialties Treated

  • Oncology
  • Internal Medicine
  • Hematology

Insurance Accepted

* Insurance information may change frequently. Please verify directly with the provider (doctor/clinic).

  • UnitedHealthOne
  • AARP
  • Medicare
  • Humana
  • HealthPartners
  • Medica
  • CHAMPVA
  • Meritain Health
  • UnitedHealthcare
  • Colorado Access
  • Optum Health
  • GEHA
  • Cigna
  • Family Health Network
  • Medical Mutual
  • Tricare
  • Blue Cross Blue Shield
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  • Cancer 13
  • Cardiology, Heart & Vascular Surgery 12
  • Orthopedics 27
  • Neurology & Neurosurgery 20
  • Gastroenterology & GI Surgery 23
  • Pulmonology & Lung Surgery 23
  • Diabetes & Endocrinology 3
  • Children's Hospital 2
  • Urology 20
  • Psychiatry 16
  • Geriatrics 21
  • Rehabilitation 21
  • Obsterics & Gynecology 5
  • Ophthalmology 1
  • Ear, Nose & Throat 2
  • Rheumatology 1
  • Long Term Care 5
  • Maternity Care (Uncomplicated Pregnancy) 18