Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Lilian Au, N.D., M.P.H
Naturopath in Costa Mesa, CA · enumerated 2009.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1861728768
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Registry record
Entity type Individual (Type 1)
Name Dr. Lilian Au
Credential N.D., M.P.H
Sex Female
Practice address 1202 Bristol St, 2nd Floor, Costa Mesa, CA, 92626
Phone (714) 424-9001
Fax (714) 424-9005
Enumeration date Oct 27, 2009
Last updated in NPPES Sep 25, 2023
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 Lilian Au?
The National Provider Identifier (NPI) for Lilian Au is 1861728768, a Type 1 (individual) record in the CMS NPPES registry.
Where does Lilian Au practice?
The practice location on file with NPPES is in Costa Mesa, 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 2023-09-25.