Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Lily Breen
Registered Nurse in San Rafael, CA · enumerated 2015.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1033574660
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Registry record
Entity type Individual (Type 1)
Name Lily Breen
Sex Female
Practice address 54 Crestwood Dr, San Rafael, CA, 94901
Phone (415) 246-6705
Enumeration date Dec 26, 2015
Last updated in NPPES Dec 26, 2015
Taxonomy & licenses
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.
Frequently asked questions
What is the NPI number for Lily Breen?
The National Provider Identifier (NPI) for Lily Breen is 1033574660, a Type 1 (individual) record in the CMS NPPES registry.
Where does Lily Breen practice?
The practice location on file with NPPES is in San Rafael, CA. Providers can have multiple locations; NPPES lists the primary practice address.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-12-26.