John M. Barnett, MD
Hematology & Oncology Physician · Oncologist in Longmont, CO
Provider details
- Specialty
- Hematology & Oncology Physician
- Credentials
- MD
- NPI number
- 1952341273
Checked against the CMS National Provider Identifier registry on October 2, 2026.
Medicare information
- Medical school
- Southern Illinois University School of Medicine, graduated 2000
- Also sees patients at
- Select Physical Therapy Holdings
730 14th St Sw, Suite 200, Loveland, CO 80537 · (970) 663-0815
- Select Physical Therapy Holdings
- Hospital affiliations
- Longs Peak Hospital, Longmont, CO · Medicare rating 5 out of 5 stars
- Boulder Community Health, Boulder, CO · Medicare rating 4 out of 5 stars
- Longmont United Hospital, Longmont, CO · Medicare rating 3 out of 5 stars
- Medical Center of the Rockies, Loveland, CO · Medicare rating 5 out of 5 stars
- Uchealth Greeley Hospital, Greeley, CO · Medicare rating 4 out of 5 stars
- Medicare
- Accepts Medicare assignment (the Medicare-approved amount as full payment)
- Telehealth
- Offers telehealth visits
From Medicare’s public Care Compare data (Doctors and Clinicians), checked October 3, 2026. Ratings are Medicare’s, not Know Cancer’s. Medicare Care Compare
About
Specialties
- Hematology
- Oncology
- Internal Medicine
Insurance
- Aetna HMO
- Blue Cross and Blue Shield - BlueCard PPO
- Cigna - Open Access
- Cigna HMO
- Cigna PPO
- First Health PPO
- Great West Healthcare PPO
- Humana - Choice Care PPO
- MultiPlan - PHCS PPO
- MultiPlan PPO
- United HealthCare - Choice Plus POS
- United HealthCare - Options PPO
Other care in Longmont
- Emotional Support in Longmont (69)
- Holistic Practitioners in Longmont (28)
- Psychologists in Longmont (14)
- Health Insurance in Longmont (9)
- Wellness and Nutrition in Longmont (8)
- Medical Imaging and Screening in Longmont (7)
- Psychiatrists in Longmont (4)
- Prosthetics, Wigs & Accessories in Longmont (3)
- Legal Assistance in Longmont (2)
- Cancer Treatment Centers in Longmont (2)
- Massage Therapists in Longmont (1)
- Hospice in Longmont (1)
- Home Health Care in Longmont (1)
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