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About this NPIWhat this record shows.
NPI 1477079655 is registered to Cassandra Sierra, a Speech-Language Assistant practising at 632 W 11th St Ste 119 in Tracy, California. Speech-Language Assistant is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Cassandra Sierra has been enumerated in the National Provider Identifier (NPI) registry since 2017.
Provider type
Individual (Type 1)
Status
Active
Enumerated
2017-08-18
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The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Cassandra Sierra accepts. To confirm in-network status with your specific health plan, contact Cassandra Sierra directly at (925) 470-6948.
Frequently asked
Yes. NPI 1477079655 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Speech-Language Assistant 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 (925) 470-6948.
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. Cassandra Sierra is a Type-1 individual NPI.
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