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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

ARI FIERER
NPI 1982512034
Counselor - Mental Health in South Boston, MA

Active since August 31, 2026
25 JAMES ONEILL ST, SOUTH BOSTON, MA 02127(617) 534-9500 Get Directions Write a Review

NPPES record added: August 31, 2026. Verified against the NPPES registry weekly; last sync: September 06, 2026.

About Ari Fierer NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ARI FIERER (NPI 1982512034) is an individual mental health provider in South Boston, Massachusetts and active in the NPI registry since August 2026.

NPPES Registry Identity

NPI1982512034
Entity TypeIndividualMale
Primary Taxonomy101YM0800X
Provider Legal NameARI FIERER
Location Address25 JAMES ONEILL STSouth Boston, MA 02127-4504
Mailing Address25 James Oneill StSouth Boston, MA 02127-4504 · (617) 534-9500
Phone(617) 534-9500
Sole ProprietorYes
Enumeration DateAugust 31, 2026
NPPES CertifiedAugust 31, 2026
✔ NPI 1982512034 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
25 JAMES ONEILL ST, South Boston, MA 02127
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Other Providers at the Same Location NPPES 9

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JOEL B HARK
Counselor (Mental Health)
25 JAMES ONEILL ST
SOUTH BOSTON, MA 02127
Suffolk County (617) 534-9500
BRIANNA N KIMICK
Counselor (Mental Health)
25 JAMES ONEILL ST
SOUTH BOSTON, MA 02127
Suffolk County (617) 534-9500
BOSTON PUBLIC HEALTH COMMISSION
Clinic/Center (Mental Health (Including Community Mental Health Center))
25 JAMES ONEILL ST
SOUTH BOSTON, MA 02127
Suffolk County (617) 534-9500
MEGHAN GRACE SHEEHAN
Counselor
25 JAMES ONEILL ST
SOUTH BOSTON, MA 02127
Suffolk County (617) 534-9500
ALEXANDRA SULLIVAN
Counselor (Mental Health)
25 JAMES ONEILL ST
SOUTH BOSTON, MA 02127
Suffolk County (617) 534-9500
CATHERINE B THERIAULT
Social Worker (Clinical)
25 JAMES ONEILL ST
SOUTH BOSTON, MA 02127
Suffolk County (617) 534-9500
THERESA TARA JOHNSON
Counselor (Addiction (Substance Use Disorder))
25 JAMES ONEILL ST
SOUTH BOSTON, MA 02127
Suffolk County (617) 534-9500
MARGARET ELLEN NOLAN
Counselor (Mental Health)
25 JAMES ONEILL ST
BOSTON, MA 02127
Suffolk County (617) 534-9500

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ari Fierer's NPI number?

The NPI number for Ari Fierer is 1982512034. It was assigned to this individual provider in the NPPES registry on August 31, 2026.

Where is Ari Fierer located?

Ari Fierer practices at 25 James Oneill St, South Boston, MA 02127. The listed phone number is (617) 534-9500.

What is Ari Fierer's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

When was this NPI record last updated?

The NPPES record for Ari Fierer was last updated on August 31, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.