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

THAYER BEHAVIORAL HEALTH SERVICES, LLC
NPI 1235041104
Clinic/Center - Adult Mental Health in Boston, MA

Q: What is Thayer Behavioral Health Services, LLC's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Adult Mental Health, with taxonomy code 261QM0850X.

Active since September 17, 2026

1035 SOUTH ST APT 3, BOSTON, MA 02131(617) 301-3390 Get Directions Write a Review

NPPES record added: September 17, 2026. Verified against the NPPES registry weekly; last sync: September 20, 2026.

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About Thayer Behavioral Health Services, Llc NPPES

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

THAYER BEHAVIORAL HEALTH SERVICES, LLC (NPI 1235041104), doing business as Katherine Thayer, Licsw, Mba, is a healthcare organization registered as an adult mental health in Boston, Massachusetts and active in the NPI registry since September 2026. The organization lists Katherine Thayer, Owner, as its authorized official.

NPPES Registry Identity

NPI1235041104

Entity TypeOrganization

Primary Taxonomy261QM0850X

Legal Business NameTHAYER BEHAVIORAL HEALTH SERVICES, LLC

Location Address1035 SOUTH ST APT 3Boston, MA 02131-2336

Mailing Address1035 South St Apt 3Boston, MA 02131-2336 · (617) 301-3390

Phone(617) 301-3390

Organization SubpartNo

Authorized OfficialKatherine ThayerOwner · (617) 301-3390

Enumeration DateSeptember 17, 2026

NPPES CertifiedSeptember 17, 2026

✔ NPI 1235041104 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · Adult Mental HealthAmbulatory Health Care Facilities

Taxonomy Code261QM0850X

Definition

An entity, facility, or distinct part of a facility providing diagnostic, treatment, and prescriptive services related to mental and behavioral disorders in adults.

1035 SOUTH ST APT 3, Boston, MA 02131

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Other Names 1

Doing Business AsKatherine Thayer, Licsw, Mba

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 Thayer Behavioral Health Services, LLC's NPI number?

The NPI number for Thayer Behavioral Health Services, LLC is 1235041104. It was assigned to this organization in the NPPES registry on September 17, 2026. The provider is doing business as Katherine Thayer, LICSW, MBA.

Where is Thayer Behavioral Health Services, LLC located?

Thayer Behavioral Health Services, LLC is located at 1035 South St Apt 3, Boston, MA 02131. The listed phone number is (617) 301-3390.

What is Thayer Behavioral Health Services, LLC's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Adult Mental Health, with taxonomy code 261QM0850X.

When was this NPI record last updated?

The NPPES record for Thayer Behavioral Health Services, LLC was last updated on September 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.