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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dianne M Sim, RN

Administrator Registered Nurse in Pinole, CA · enumerated 2009 · practices at IV Assist, Inc..

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1336474840

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Registry record

Entity type Individual (Type 1)
Name Dianne M Sim
Credential RN
Sex Female
Practice address Pinole, CA, 94564
Phone (510) 222-8403
Fax (888) 711-6364
Enumeration date Oct 16, 2009
Last updated in NPPES Oct 16, 2009

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

163WA2000X Administrator Registered Nurse Nursing Service Providers · License 344586 (CA) Primary
RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

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.

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Frequently asked questions

What is the NPI number for Dianne Sim?
The National Provider Identifier (NPI) for Dianne Sim is 1336474840, a Type 1 (individual) record in the CMS NPPES registry.
Where does Dianne Sim practice?
The practice location on file with NPPES is in Pinole, CA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-10-16.