Peter Gregos
NPI 1447670773 · Hematology & Oncology Physician · Brooklyn, NY
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Gregos is a Hematology & Oncology Physician provider in Brooklyn, NY (NPI 1447670773).
Provider details
- NPI number
- 1447670773
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- Yes
- License
- 305725 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
12 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
867 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 219 | $108 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 162 | $19 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 141 | $74 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 85 | $89 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 73 | $162 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Abiraterone Acetate | 133 | 19 |
| Prednisone | 94 | 15 |
| Apixabanbrand: Eliquis | 43 | 13 |
| Relugolixbrand: Orgovyx | 33 | — |
| Enzalutamidebrand: Xtandi | 31 | — |
| Ondansetron Hcl | 27 | — |
| Apalutamidebrand: Erleada | 14 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-04-25
- Last updated
- 2025-02-12
- Certified
- 2025-02-12
Frequently asked questions
- What is Peter Gregos's NPI number?
- Peter Gregos's National Provider Identifier (NPI) is 1447670773, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Gregos's specialty?
- Peter Gregos is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Gregos located?
- Peter Gregos's practice location on file with NPPES is 506 6th St, Brooklyn, NY 11215-3609.
- What is Peter Gregos's phone number?
- The practice phone number listed in the NPPES registry for Peter Gregos is (347) 694-5035.
- Does Peter Gregos accept Medicare?
- Peter Gregos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Gregos's NPI active?
- Yes — Peter Gregos's NPI (1447670773) is active in the NPPES registry as of the last update on 2025-02-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.