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

Dr. Andrew Hahn, PSY.D

Psychologist in Waltham, MA · enumerated 2007 · practices at Life Centered Therapy LLC.

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

National Provider Identifier

1679620389

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Registry record

Entity type Individual (Type 1)

Name Dr. Andrew Hahn

Credential PSY.D

Sex Male

Practice address Waltham, MA, 02451

Phone (781) 274-6633

Fax (781) 274-6644

Enumeration date Jan 4, 2007

Last updated in NPPES Nov 21, 2017

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

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License PY4357-PR (MA) Primary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential

Other identifiers

Identifier	Type	State	Issuer
142390	Other	MA	MAGELLAN BEHAVIORAL HEALT
008775	Other	MA	VALUE OPTIONS
W04346	Other	MA	BLUE CROSS BLUE SHIELD

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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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 Andrew Hahn?

Andrew Hahn is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Life Centered Therapy LLC Psychologist · Waltham, MA NPI 1710736228

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-11-21.