Stephen Marshall, PHD
NPI 1235651290 · Psychologist · Arlington, MA
Stephen Marshall, PHD is a Psychologist provider in Arlington, MA (NPI 1235651290).
Provider details
- NPI number
- 1235651290
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
- Cognitive & Behavioral Psychologist103TB0200X
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
8 yrs in NPPES registry
- Profile completeness38% of score
83% 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)
- 22 Mill St Ste 108Arlington, MA 02476-4738Phone: (617) 855-3519
Registry dates
- Enumerated
- 2017-07-12
- Last updated
- 2021-06-05
- Certified
- 2021-06-05
Frequently asked questions
- What is Stephen Marshall's NPI number?
- Stephen Marshall's National Provider Identifier (NPI) is 1235651290, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Marshall's specialty?
- Stephen Marshall is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Stephen Marshall located?
- Stephen Marshall's practice location on file with NPPES is 226 Massachusetts Ave Ste 2a, Arlington, MA 02474-8449.
- What is Stephen Marshall's phone number?
- The practice phone number listed in the NPPES registry for Stephen Marshall is (617) 977-4770.
- Is Stephen Marshall's NPI active?
- Yes — Stephen Marshall's NPI (1235651290) is active in the NPPES registry as of the last update on 2021-06-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.