Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Katherine Luethy, NP

Nurse Practitioner in Cambridge, MA · enumerated 2007.

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

National Provider Identifier

1174717474

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Registry record

Entity type Individual (Type 1)

Name Mrs. Katherine Luethy

Credential NP

Sex Female

Practice address 75 Mount Auburn St, Harvard University Health Service, Cambridge, MA, 02138

Phone (617) 495-8414

Fax (617) 496-0560

Enumeration date Aug 29, 2007

Last updated in NPPES Jan 14, 2015

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 267487 (MA) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

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 → Validate an NPI →

Frequently asked questions

What is the NPI number for Katherine Luethy?

The National Provider Identifier (NPI) for Katherine Luethy is 1174717474, a Type 1 (individual) record in the CMS NPPES registry.

Where does Katherine Luethy practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-01-14.