Isabelle Grenier, LMHC
NPI 1417670597 · Mental Health Counselor · Cambridge, MA
Isabelle Grenier, LMHC is a Mental Health Counselor provider in Cambridge, MA (NPI 1417670597).
Provider details
- NPI number
- 1417670597
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- LMHC
- Sex
- Female
- Sole proprietor
- No
- License
- LMHC12979 (MA)
Specialties & taxonomies
Behavioral Health & Social 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
2 documented practice locations
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
Additional practice locations (1)
- 1415 Beacon St Ste 200Brookline, MA 02446-4819Phone: (617) 447-4435
Registry dates
- Enumerated
- 2022-09-22
- Last updated
- 2026-02-26
- Certified
- 2026-02-26
Frequently asked questions
- What is Isabelle Grenier's NPI number?
- Isabelle Grenier's National Provider Identifier (NPI) is 1417670597, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Isabelle Grenier's specialty?
- Isabelle Grenier is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Isabelle Grenier located?
- Isabelle Grenier's practice location on file with NPPES is 2000 Massachusetts Ave Ste 4, Cambridge, MA 02140-2100.
- What is Isabelle Grenier's phone number?
- The practice phone number listed in the NPPES registry for Isabelle Grenier is (617) 447-4435.
- Is Isabelle Grenier's NPI active?
- Yes — Isabelle Grenier's NPI (1417670597) is active in the NPPES registry as of the last update on 2026-02-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.