Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Teresa Lynn Simi, NP, RN

Nurse Practitioner in Larkspur, CA · enumerated 2011 · practices at By the Bay Health.

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

National Provider Identifier

1336447911

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Registry record

Entity type Individual (Type 1)

Name Teresa Lynn Simi

Credential NP, RN

Sex Female

Practice address 17 E Sir Francis Drake Blvd, Larkspur, CA, 94939

Phone (415) 927-2273

Enumeration date Mar 7, 2011

Last updated in NPPES Mar 7, 2011

Taxonomy & licenses

163WH1000X Hospice Registered Nurse Nursing Service Providers · License 504786 (CA) Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 11177 (CA) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Teresa Simi?

Teresa Simi is registered in NPPES with the primary taxonomy of Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-03-07.