Gradon Nielsen, M.D.
NPI 1669868774 · Hematology & Oncology Physician · Norfolk, VA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Provider details
- NPI number
- 1669868774
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 0101271237 (VA)
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
11 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
12,726 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) |
|---|---|---|
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 1,582 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 1,435 | $10 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 884 | $9 |
| Injection of Additional New Drug Or Substance Into Vein96375 | 775 | $15 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 714 | $124 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 527 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Dexamethasone | 73 | 20 |
| Olanzapine | 56 | 30 |
| Apixabanbrand: Eliquis | 54 | 19 |
| Ondansetron Hcl | 53 | 40 |
| Lenalidomide | 36 | — |
| Acyclovir | 34 | — |
| Furosemide | 27 | — |
| Letrozole | 27 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-04-15
- Last updated
- 2021-08-05
- Certified
- 2021-08-05
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.