Sarah Underhill
Also known as
- Formerly known asDang-Nguyen, Sarah Tonga
Source: NPPES public registry.
About this NPIWhat this record shows.
NPI 1679260335 is registered to Sarah Underhill, a Behavior Technician practising at 713 W Commonwealth Ave Ste C in Fullerton, California. Behavior Technician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Sarah Underhill has been enumerated in the National Provider Identifier (NPI) registry since 2023.
Your brand here.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Sarah Underhill accepts. To confirm in-network status with your specific health plan, contact Sarah Underhill directly at (714) 879-4274.
Frequently asked
Yes. NPI 1679260335 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Behavior Technician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (714) 879-4274.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Sarah Underhill is a Type-1 individual NPI.