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

William F. Flader MD, PLLC

Organization Clinic/Center · NPI 1245488337

William F. Flader MD, PLLC is a Clinic/Center in Setauket, New York. Licensed in Oklahoma. Registered with an NPI since 2008.

Licensed in
OK
In the registry since
2008
What do these letters mean?
PLLC — Professional limited liability company
A form of business registration, not a clinical qualification.

See every abbreviation used in this directory →

Practice location Address checks out

100 N Country Rd
Setauket, NY 11733-1300
Phone: (631) 941-3137
Show map & directions

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

Specialties & licences

Clinic/Center (primary) Taxonomy 261Q00000X · Licence 163266 (OK)

Record details

NPI number1245488337
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official William Flader — President · (631) 941-3137
Other names Natural Health Alternatives
NPI enumeratedSeptember 3, 2008
Last updated in NPPESSeptember 3, 2008
Mailing address100 N Country Rd, Setauket, NY 11733-1300