Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Lewis S. Breitner, PH.D.

Clinical Psychologist in Greenfield, MA · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1073596045

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Registry record

Entity type Individual (Type 1)

Name Dr. Lewis S. Breitner

Credential PH.D.

Sex Male

Practice address Greenfield, MA, 01301

Phone (413) 562-9199

Fax (413) 527-6766

Enumeration date Nov 23, 2005

Last updated in NPPES Apr 18, 2016

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

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 559 (MA) Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 2143 (MA) Primary

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 245 (MA) Secondary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
03000050	Medicaid	MA	-
10805	Other	MA	PSYCHOLOGIST
BRW50574	Other	MA	PTAN

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.

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Frequently asked questions

Where does Lewis Breitner practice?

The practice location on file with NPPES is in Greenfield, MA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Lewis Breitner?

The National Provider Identifier (NPI) for Lewis Breitner is 1073596045, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Kathryn Mcnally Clinical Psychologist · Greenfield, MA NPI 1417968447

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-04-18.