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

Marc S Williams, MD

Individual provider Clinical Genetics (M.D.) Physician · NPI 1992807655

Marc S Williams, MD is a Clinical Genetics (M.D.) Physician in Danville, Pennsylvania. Licensed in Pennsylvania and Utah. Registered with an NPI since 2006.

Licensed in
PA, UT
In the registry since
2006
Specialties on file
4
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

100 N Academy Ave
Danville, PA 17822-1005
Phone: (570) 214-7941
Fax: (570) 271-5886
Show map & directions

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

Specialties & licences

Clinical Genetics (M.D.) Physician (primary) Taxonomy 207SG0201X · Licence MD444648 (PA)
Clinical Genetics (M.D.) Physician Taxonomy 207SG0201X · Licence 57601011205 (UT)
Pediatrics Physician Taxonomy 208000000X · Licence MD444648 (PA)
Pediatrics Physician Taxonomy 208000000X · Licence 57601018905 (UT)

Record details

NPI number1992807655
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 2, 2006
Last updated in NPPESAugust 12, 2020
Certification dateAugust 12, 2020
Mailing address100 N Academy Ave, Danville, PA 17822-4903

Other providers in Danville