IndividualActive
Mary Pierron, PSY.D.
NPI 1699984781 · Clinical Psychologist · Somerville, MA
Mary Pierron, PSY.D. is a Clinical Psychologist provider in Somerville, MA (NPI 1699984781).
Provider details
- NPI number
- 1699984781
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 4004 (MA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(89/100 index)
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
63 College Ave
Somerville, MA 02144-1957
Phone: (617) 629-6628
Fax: (617) 629-4454
Street-level locationGet directions
Mailing address
63 College Ave
Somerville, MA 02144-1999
Registry dates
- Enumerated
- 2007-05-22
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mary Pierron's NPI number?
- Mary Pierron's National Provider Identifier (NPI) is 1699984781, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Pierron's specialty?
- Mary Pierron is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Mary Pierron located?
- Mary Pierron's practice location on file with NPPES is 63 College Ave, Somerville, MA 02144-1957.
- What is Mary Pierron's phone number?
- The practice phone number listed in the NPPES registry for Mary Pierron is (617) 629-6628.
- Is Mary Pierron's NPI active?
- Yes — Mary Pierron's NPI (1699984781) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.