Louis Avvento, MD
NPI 1417999533 · Hematology & Oncology Physician · Southampton, NY
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Louis Avvento, MD is a Hematology & Oncology Physician provider in Southampton, NY (NPI 1417999533).
Provider details
- NPI number
- 1417999533
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 161779 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
48,507 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Flow Cytometry Technique for Dna Or Cell Analysis, Each Additional Marker88185 | 6,356 | $28 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 4,440 | $9 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 4,387 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 3,135 | $10 |
| Lactate Dehydrogenase (enzyme) Level83615 | 2,158 | $6 |
| Magnesium Level83735 | 2,136 | $7 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 67 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Darbepoetin Alfa in Polysorbatbrand: Aranesp | 297 | 72 |
| Apixabanbrand: Eliquis | 200 | 37 |
| Letrozole | 129 | 36 |
| Fosnetupitant/Palonosetronbrand: Akynzeo | 101 | 28 |
| Prednisone | 75 | 37 |
| Anastrozole | 67 | 15 |
| Leuprolide Acetatebrand: Lupron Depot | 59 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$144 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-12
- Last updated
- 2020-01-30
- Certified
- 2020-01-30
Frequently asked questions
- What is Louis Avvento's NPI number?
- Louis Avvento's National Provider Identifier (NPI) is 1417999533, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Louis Avvento's specialty?
- Louis Avvento is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Louis Avvento located?
- Louis Avvento's practice location on file with NPPES is 640 County Road 39, Southampton, NY 11968-5219.
- What is Louis Avvento's phone number?
- The practice phone number listed in the NPPES registry for Louis Avvento is (631) 751-3000.
- Does Louis Avvento accept Medicare?
- Louis Avvento is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Louis Avvento's NPI active?
- Yes — Louis Avvento's NPI (1417999533) is active in the NPPES registry as of the last update on 2020-01-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.