Peter L Breen Jr., MSPT, ATC

Peter L Breen Jr. is a Physical Therapist provider (Physical Therapist) practicing in Allston, MA, registered in the NPPES registry with NPI 1508943887 since 2006.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1508943887
Entity type	Individual (Type 1)
Name	Peter L Breen Jr.
Credential	MSPT, ATC
Sex	Male
Practice address	Allston, MA, 02134
Phone	6172541656
Fax	6172541657
Enumeration date	2006-11-01
Last updated in NPPES	2007-07-08

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
225100000X	Physical Therapist	Primary	15855	MA

Other identifiers

Identifier	Type	State	Issuer
002603106-001	Other	UT	UNITED
449414	Other	MA	TUFTS
Q08067	Other	MA	BCBS

Copy-ready billing details

Provider: Peter Breen, MSPT, ATC
NPI: 1508943887
Taxonomy: 225100000X (Physical Therapist)
Address: Allston, MA, 02134

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1700040128	Peter Breen	Organization	Physical Therapy Clinic/Center	Allston, MA
1740592401	Aiko Callahan	Individual	Physical Therapist	Allston, MA
1982966032	Backstage Pt LLC	Organization	Physical Therapy Clinic/Center	Boston, MA
1154763795	Steve Yoon	Individual	Optician	Allston, MA

Verify this record

Cross-check NPI 1508943887 against the authoritative CMS record: view Peter L Breen Jr. on the official NPPES registry .

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.

Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Peter Breen?

Peter Breen is registered in NPPES with the primary taxonomy of Physical Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.