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

Carolyn Anne Rieder, PH.D.

Clinical Psychologist in Cambridge, MA · enumerated 2006.

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

National Provider Identifier

1124074224

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Registry record

Entity type Individual (Type 1)

Name Carolyn Anne Rieder

Credential PH.D.

Sex Female

Practice address Cambridge, MA, 02138

Phone (617) 855-3642

Fax (617) 491-3970

Enumeration date May 26, 2006

Last updated in NPPES Jul 1, 2013

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

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 4409 (MA) Primary

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
W04241	Other	MA	BCBS

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

What specialty is Carolyn Rieder?

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

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.

Other providers at this practice address

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Greg Kolodziejczak Clinical Psychologist · Cambridge, MA NPI 1760715940 Sarah Sanders Psychiatry Physician · Cambridge, MA NPI 1598225286 Kerrin Meseck Registered Dietitian · Cambridge, MA NPI 1013535400 Christina Chan Registered Dietitian · Cambridge, MA NPI 1386214997

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-07-01.