Patrick Griswold, LMHC, LADC 1
NPI 1639259146 · Addiction (Substance Use Disorder) Counselor · Somerville, MA
Patrick Griswold, LMHC, LADC 1 is a Addiction (Substance Use Disorder) Counselor provider in Somerville, MA (NPI 1639259146).
Provider details
- NPI number
- 1639259146
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- LMHC, LADC 1
- Sex
- Male
- Sole proprietor
- Yes
- License
- 169 (MA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
19 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
- 2006-10-17
- Last updated
- 2025-09-11
Frequently asked questions
- What is Patrick Griswold's NPI number?
- Patrick Griswold's National Provider Identifier (NPI) is 1639259146, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Patrick Griswold's specialty?
- Patrick Griswold is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Patrick Griswold located?
- Patrick Griswold's practice location on file with NPPES is 260 Beacon St, Somerville, MA 02143-3534.
- What is Patrick Griswold's phone number?
- The practice phone number listed in the NPPES registry for Patrick Griswold is (617) 661-5700.
- Is Patrick Griswold's NPI active?
- Yes — Patrick Griswold's NPI (1639259146) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.