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

Marissa Hollyer, MS, CGC

Individual provider Genetic Counselor (M.S.) · NPI 1356061246

Marissa Hollyer, MS, CGC is registered under Genetic Counselor (M.S.) in Boston, Massachusetts. Licensed in Massachusetts and New Hampshire. Registered with an NPI since 2022.

Licensed in
MA, NH
In the registry since
2022
Specialties on file
2
What do these letters mean?
MS — Master of Science
A graduate science degree.

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Practice location Address checks out

450 Brookline Avenue DA-10
Boston, MA 02215
Phone: (617) 632-3582
Fax: (617) 582-8305
Show map & directions

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

Specialties & licences

Genetic Counselor (M.S.) (primary) Taxonomy 170300000X · Licence GC689 (MA)
Genetic Counselor (M.S.) Taxonomy 170300000X · Licence 0349 (NH)

Record details

NPI number1356061246
Entity typeIndividual (Type 1)
GenderFemale
Credentials MS , CGC
Sole proprietorNo
NPI enumeratedAugust 31, 2022
Last updated in NPPESAugust 31, 2022
Certification dateAugust 31, 2022

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