Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Louis J Avvento, MD

Individual provider Hematology & Oncology Physician · NPI 1417999533

Dr. Louis J Avvento, MD is a Medical Oncology in Southampton, New York. Qualified in 1981, 45 years ago. Practices with North Shore Hematology Oncology Associates PC, a 473-clinician group, accepts Medicare assignment and offers telehealth. Licensed in New York.

Years since qualifying
45
Licensed in
NY
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

640 County Road 39
Southampton, NY 11968-5219
Phone: (631) 751-3000
Fax: (631) 509-6559
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 161779 (NY)

Record details

NPI number1417999533
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 12, 2006
Last updated in NPPESJanuary 30, 2020
Certification dateJanuary 30, 2020

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyMEDICAL ONCOLOGY
Also practisesHEMATOLOGY/ONCOLOGY
Medical schoolOTHER
Graduated 1981 (45 years in practice)
Group practice North Shore Hematology Oncology Associates Pc — 473 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services