Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

John M Barnett, MD

Individual provider Hematology & Oncology Physician · NPI 1952341273

John M Barnett, MD is a Hematology/Oncology in Longmont, Colorado. Graduated from Southern Illinois University School of Medicine in 2000, 26 years ago. Practices with Rocky Mountain Cancer Centers LLP, a 132-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Colorado.

Years since qualifying
26
Trained at
Southern Illinois University School of Medicine
Licensed in
CO
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1760 E Ken Pratt Blvd Ste 302
Longmont, CO 80504-5311
Phone: (303) 684-1900
Fax: (303) 684-1925
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 44274 (CO)

Record details

NPI number1952341273
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 7, 2006
Last updated in NPPESJuly 6, 2023
Certification dateJuly 6, 2023
Mailing address7951 E Maplewood Ave, Suite 300, Greenwood Village, CO 80111

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolSOUTHERN ILLINOIS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2000 (26 years in practice)
Group practice Rocky Mountain Cancer Centers Llp — 132 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

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