John M. Barnett, MD
NPI 1952341273ActiveIndividual· Internal Medicine, Hematology & Oncology· Longmont, CO
Internal Medicine, Hematology & Oncology (MD) in Longmont, Colorado, trained at Southern Illinois University School of Medicine (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $5,422,158 for 1,803 claims, against $2,390,000 paid for services in 2024. Medtronic, Inc. was the largest of 3 companies reporting payments in 2025, $125.15 in all, mostly food and beverage.
Overview
| NPI | 1952341273 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 7, 2006 |
| Last updated in NPPES | Jul 6, 2023 |
| Certified by provider | Jul 6, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 44274 | CO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (CO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 587 |
|---|---|
| Services billed | 127,974 across 173 procedure codes |
| Paid by Medicare | $2,390,000 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,803 · 2,579 30-day fills |
|---|---|
| Patients | 269 |
| Total drug cost | $5,422,158 |
| Generic share | 71% of claims |
Education and affiliations
| Medical school | Southern Illinois University School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical groups
- Select Physical Therapy Holdings IncClarksville, TN · 2,024 clinicians
- Rocky Mountain Cancer Centers LLPDenver, CO · 132 clinicians
Hospital affiliations
- Boulder Community HealthBoulder, CO
- Longmont United HospitalLongmont, CO
- Longs Peak HospitalLongmont, CO
- Medical Center of the RockiesLoveland, CO
- Uchealth Greeley HospitalGreeley, CO
Industry payments (Open Payments)
- 2025$125.15 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Medtronic, Inc. | $55.49 | 1 |
| Janssen Pharmaceuticals, Inc | $44.84 | 2 |
| Sumitomo Pharma America, Inc. | $24.82 | 1 |
What the 2025 payments were for
- Food and Beverage$100.33 · 3 payments
- Education$24.82 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Hematology & Oncology providers in Longmont
- 1780399378
- 1538762760
- 1740536291
- 1992789598
- 1841274495
- 1023303096
- 1124293535
All Internal Medicine, Hematology & Oncology providers in Colorado →