John Barnett, MD
NPI 1952341273 · Hematology & Oncology Physician · Longmont, CO
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Barnett, MD is a Hematology & Oncology Physician provider in Longmont, CO (NPI 1952341273).
Provider details
- NPI number
- 1952341273
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 44274 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
10,333 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 1,686 | $9 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 1,478 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 1,343 | $10 |
| Gammaglobulin (immune System Protein) Measurement82784 | 468 | $9 |
| Flow Cytometry Technique for Dna Or Cell Analysis, Each Additional Marker88185 | 467 | $24 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 432 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 44 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 145 | 39 |
| Abiraterone Acetate | 131 | 24 |
| Gabapentin | 101 | 24 |
| Apixabanbrand: Eliquis | 91 | 27 |
| Dexamethasone | 88 | 41 |
| Acyclovir | 70 | 19 |
| Levothyroxine Sodium | 67 | 20 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-07
- Last updated
- 2023-07-06
- Certified
- 2023-07-06
Frequently asked questions
- What is John Barnett's NPI number?
- John Barnett's National Provider Identifier (NPI) is 1952341273, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Barnett's specialty?
- John Barnett is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is John Barnett located?
- John Barnett's practice location on file with NPPES is 1760 E Ken Pratt Blvd Ste 302, Longmont, CO 80504-5311.
- What is John Barnett's phone number?
- The practice phone number listed in the NPPES registry for John Barnett is (303) 684-1900.
- Does John Barnett accept Medicare?
- John Barnett is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Barnett's NPI active?
- Yes — John Barnett's NPI (1952341273) is active in the NPPES registry as of the last update on 2023-07-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.