Mary Ann Defalco, NP

NPI 1144208570 · on the registry since 2006

Practice

Address: 540 Union Blvd
West Islip, NY 11795
Phone: (631) 669-2555
Organisation at this address: St. Francis Hospital
Chs Physician Partners, Pc
Southbay Cardiovascular Assoc Pc
Inferred from a shared address, not stated in the registry.
Clinicians at this address: 53

Registry record

Primary taxonomy: Nurse Practitioner
363L00000X
Licence states on file: NY
From the registry's licence fields, which are often incomplete.
Sex: Female
Record last updated: 2026-07-13

Source: CMS National Plan and Provider Enumeration System. Registration is not the same as practising, and the registry records no retirement — some people listed here no longer practise. More in New York