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Matthew Duffy, PH.D.
NPI 1174849483 · Clinical Psychologist · Arlington, MA
Matthew Duffy, PH.D. is a Clinical Psychologist provider in Arlington, MA (NPI 1174849483).
Provider details
- NPI number
- 1174849483
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 9132 (MA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(83/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 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
94 Pleasant St Ste 16
Arlington, MA 02476
Phone: (781) 646-0649
Street-level locationGet directions
Mailing address
Po Box 400762
Cambridge, MA 02140-0008
Registry dates
- Enumerated
- 2010-04-12
- Last updated
- 2018-06-23
Frequently asked questions
- What is Matthew Duffy's NPI number?
- Matthew Duffy's National Provider Identifier (NPI) is 1174849483, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Duffy's specialty?
- Matthew Duffy is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Matthew Duffy located?
- Matthew Duffy's practice location on file with NPPES is 94 Pleasant St Ste 16, Arlington, MA 02476.
- What is Matthew Duffy's phone number?
- The practice phone number listed in the NPPES registry for Matthew Duffy is (781) 646-0649.
- Is Matthew Duffy's NPI active?
- Yes — Matthew Duffy's NPI (1174849483) is active in the NPPES registry as of the last update on 2018-06-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.