Marissa Hollyer, MS, CGC
NPI 1356061246 · Genetic Counselor (M.S.) · Boston, MA
Marissa Hollyer, MS, CGC is a Genetic Counselor (M.S.) provider in Boston, MA (NPI 1356061246).
Provider details
- NPI number
- 1356061246
- Entity type
- Individual
- Primary specialty
- Genetic Counselor (M.S.)Other Service Providers
- Credential
- MS, CGC
- Sex
- Female
- Sole proprietor
- No
- License
- 0349 (NH)
Specialties & taxonomies
Other Service Providers
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-08-31
- Last updated
- 2022-08-31
- Certified
- 2022-08-31
Frequently asked questions
- What is Marissa Hollyer's NPI number?
- Marissa Hollyer's National Provider Identifier (NPI) is 1356061246, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Hollyer's specialty?
- Marissa Hollyer is listed in the NPPES registry with a primary specialty of Genetic Counselor (M.S.) (Other Service Providers).
- Where is Marissa Hollyer located?
- Marissa Hollyer's practice location on file with NPPES is 450 Brookline Avenue, Boston, MA 02215.
- What is Marissa Hollyer's phone number?
- The practice phone number listed in the NPPES registry for Marissa Hollyer is (617) 632-3582.
- Is Marissa Hollyer's NPI active?
- Yes — Marissa Hollyer's NPI (1356061246) is active in the NPPES registry as of the last update on 2022-08-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.