Mental Health Matters Practice PLLC
NPI 1356052641 · Clinical Social Worker · Cambridge, MA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mental Health Matters Practice PLLC is a Clinical Social Worker organization in Cambridge, MA (NPI 1356052641).
Provider details
- NPI number
- 1356052641
- Entity type
- Organization
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- Kayley Walsh, Clinical Director(781) 835-5733
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
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
Other names (DBA / former)
- Doing business as
- Ellie Mental Health
- Doing business as
- Ellie Mental Health
Registry dates
- Enumerated
- 2022-12-08
- Last updated
- 2023-03-16
- Certified
- 2023-03-16
Frequently asked questions
- What is Mental Health Matters Practice PLLC's NPI number?
- Mental Health Matters Practice PLLC's National Provider Identifier (NPI) is 1356052641, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mental Health Matters Practice PLLC?
- Mental Health Matters Practice PLLC is classified in the NPPES registry as Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mental Health Matters Practice PLLC located?
- Mental Health Matters Practice PLLC's practice location on file with NPPES is 875 Massachusetts Ave Ste 4, Cambridge, MA 02139-3067.
- What is Mental Health Matters Practice PLLC's phone number?
- The practice phone number listed in the NPPES registry for Mental Health Matters Practice PLLC is (617) 812-1697.
- Does Mental Health Matters Practice PLLC accept Medicare?
- Mental Health Matters Practice PLLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Mental Health Matters Practice PLLC?
- The authorized official listed on Mental Health Matters Practice PLLC's NPPES record is Kayley Walsh, Clinical Director. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mental Health Matters Practice PLLC's NPI active?
- Yes — Mental Health Matters Practice PLLC's NPI (1356052641) is active in the NPPES registry as of the last update on 2023-03-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.