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

William B. Sullivan, NP

Individual provider Gerontology Nurse Practitioner · NPI 1457542979

William B. Sullivan, NP is a Gerontology Nurse Practitioner in New York, New York. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

See every abbreviation used in this directory →

Practice location Address checks out

423 E 23rd St Dept OF Neurology
New York, NY 10010-5011
Phone: (415) 707-9728
Show map & directions

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

Specialties & licences

Gerontology Nurse Practitioner (primary) Taxonomy 363LG0600X · Licence 14982 (CA)

Record details

NPI number1457542979
Entity typeIndividual (Type 1)
GenderMale
Credentials NP
Sole proprietorNo
NPI enumeratedAugust 8, 2007
Last updated in NPPESJune 24, 2013

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