Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Brenda Irene Castolo, AGACNP-BC
Nurse Practitioner in Palo Alto, CA · enumerated 2018.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1083195408
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Registry record
Entity type Individual (Type 1)
Name Brenda Irene Castolo
Credential AGACNP-BC
Sex Female
Practice address 900 Welch Rd Ste 350, Palo Alto, CA, 94304
Phone (650) 723-6576
Enumeration date Aug 23, 2018
Last updated in NPPES Jan 9, 2019
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 95009709 (CA) Primary
363LA2100X Acute Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 95009709 (CA) 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.
Frequently asked questions
What is the NPI number for Brenda Castolo?
The National Provider Identifier (NPI) for Brenda Castolo is 1083195408, a Type 1 (individual) record in the CMS NPPES registry.
Where does Brenda Castolo practice?
The practice location on file with NPPES is in Palo Alto, CA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Yanika Wolfe Emergency Medicine Physician · Palo Alto, CA NPI 1538574108 Ursula Dean Family Nurse Practitioner · Palo Alto, CA NPI 1063813350 Meng Qiao Xi Emergency Medicine Physician · Palo Alto, CA NPI 1780117341 Pranjal Gupta Emergency Medicine Physician · Palo Alto, CA NPI 1417464363 Brock Hashim Emergency Medicine Physician · Palo Alto, CA NPI 1548766488 Nicholas Hall Emergency Medicine Physician · Palo Alto, CA NPI 1649815325 Zachary Smith Student in an Organized Health Care Education/Training Program · Palo Alto, CA NPI 1801434469 Erin Ruiz Emergency Medicine Physician · Palo Alto, CA NPI 1881213478
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-01-09.