Quick answers
- Which hospitals does John Barnett work at?
- Medicare's official clinician data lists John Barnett at 5 hospitals: Boulder Community Health, Longmont United Hospital, Longs Peak Hospital, Medical Center of the Rockies and UCHealth Greeley Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Barnett see patients?
- Medicare's clinician data lists 2 practice locations, including Longmont, CO and Loveland, CO. Call before your visit to confirm the address.
- What is John Barnett's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does John Barnett accept Medicare assignment?
- Yes. Medicare's clinician data says John Barnett accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does John Barnett offer telehealth?
- Medicare's clinician data says John Barnett offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John Barnett?
- (303) 684-1900, as listed in official Medicare / NPI Registry data.
- What is John Barnett's NPI number?
- 1952341273. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John Barnett works
Medicare's Facility Affiliation Data lists John Barnett at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Boulder Community HealthBoulder, CO · Acute Care Hospital · CCN 060027
- Longmont United HospitalLongmont, CO · Acute Care Hospital · CCN 060003
- Longs Peak HospitalLongmont, CO · Acute Care Hospital · CCN 060128
- Medical Center of the RockiesLoveland, CO · Acute Care Hospital · CCN 060119
- UCHealth Greeley HospitalGreeley, CO · Acute Care Hospital · CCN 060131
Practice locations
Addresses where John Barnett is enrolled with Medicare (CMS data updated 2026-10-02).
- 2030 Mountain View Ave, Suite 210Longmont, CO 80501 (303) 684‑1900
- 730 14th St SW, Suite 200Loveland, CO 80537 (970) 663‑0815
Group practices
Medicare enrollment lists John Barnett as a member of these groups (CMS data updated 2026-10-02).
- Select Physical Therapy Holdings Inc2,024 clinicians in the group
- Rocky Mountain Cancer Centers LLP132 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Colorado
Clinicians with the same Medicare primary specialty in Colorado — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Southern Illinois University School Of Medicine |
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1952341273 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians