Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Gretchen Ordonez De Ausen Santos, MSN, NP-C
Nurse Practitioner in Vista, CA · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1831866516
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Registry record
Entity type Individual (Type 1)
Name Gretchen Ordonez De Ausen Santos
Credential MSN, NP-C
Sex Female
Practice address 380 S Melrose Dr Ste 415, Vista, CA, 92081
Phone (626) 765-4321
Enumeration date Aug 30, 2021
Last updated in NPPES Jan 22, 2024
Taxonomy & licenses
363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 95018187 (CA) Secondary
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 95018187 (CA) Primary
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 Gretchen De Ausen Santos?
The National Provider Identifier (NPI) for Gretchen De Ausen Santos is 1831866516, a Type 1 (individual) record in the CMS NPPES registry.
Where does Gretchen De Ausen Santos practice?
The practice location on file with NPPES is in Vista, CA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-01-22.