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

Caitlin Stefens

Family Nurse Practitioner in Boston, MA · enumerated 2026.

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

National Provider Identifier

1821922717

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Registry record

Entity type Individual (Type 1)
Name Caitlin Stefens
Sex Female
Practice address Boston, MA, 02120
Phone (617) 754-5000
Enumeration date Jun 9, 2026
Last updated in NPPES Nov 4, 2026

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

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN2344584 (MA) Primary
163W00000X Registered Nurse Nursing Service Providers · License RN2344584 (MA) Secondary

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 Caitlin Stefens practice?
The practice location on file with NPPES is in Boston, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Caitlin Stefens?
The National Provider Identifier (NPI) for Caitlin Stefens is 1821922717, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-11-04.