Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Alexandra Courtney Close, NP
Nurse Practitioner in Greenbrae, CA · enumerated 2023.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1912686684
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Registry record
Entity type Individual (Type 1)
Name Alexandra Courtney Close
Credential NP
Sex Female
Practice address 900 S Eliseo Dr Ste 201, Greenbrae, CA, 94904
Phone (415) 461-1780
Enumeration date Jul 11, 2023
Last updated in NPPES Jul 1, 2026
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License NP95039514 (CA) Primary
363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 352463 (NY) Secondary
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.
Frequently asked questions
What is the NPI number for Alexandra Close?
The National Provider Identifier (NPI) for Alexandra Close is 1912686684, a Type 1 (individual) record in the CMS NPPES registry.
Where does Alexandra Close practice?
The practice location on file with NPPES is in Greenbrae, CA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Marisela Noorhasan Endocrinology, Diabetes & Metabolism Physician · Greenbrae, CA NPI 1174593206 Alexander Uihlein Endocrinology, Diabetes & Metabolism Physician · Greenbrae, CA NPI 1801043880 Aileen Wang Endocrinology, Diabetes & Metabolism Physician · Greenbrae, CA NPI 1801167887 Sharleen Sidhu Endocrinology, Diabetes & Metabolism Physician · Greenbrae, CA NPI 1962747758
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-01.