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

William Mak, DO

Individual provider Pediatric Emergency Medicine (Pediatrics) Physician · NPI 1811256258

William Mak, DO is a Pediatric Emergency Medicine (Pediatrics) Physician in Stony Brook, New York. Works from 2 locations. Licensed in New York.

Licensed in
NY
In the registry since
2012
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Partly verified

Some contact details are missing from the federal record.

Suny At Stony Brk Dept OF Pediatrics Hsc T-11 / 040
Stony Brook, NY 11794-8111
Phone: (631) 444-2020
Fax: (631) 444-2894
Show map & directions

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

Additional practice locations (1)

  • 1425 Portland Ave, Rochester, NY 14621-3011 — (585) 922-2000

Specialties & licences

Pediatric Emergency Medicine (Pediatrics) Physician (primary) Taxonomy 2080P0204X · Licence 279661 (NY)
Pediatrics Physician Taxonomy 208000000X · Licence 279661 (NY)

Record details

NPI number1811256258
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMay 4, 2012
Last updated in NPPESMarch 6, 2025
Certification dateMarch 6, 2025
Mailing addressSuny At Stony Brook Department Of Pediatrics, Hsc T-11 / 040, Stony Brook, NY 11794-8111

Other providers in Stony Brook