Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Sharon Gertz Rouillard, N.P.

Nurse Practitioner in San Ramon, CA · enumerated 2007.

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

National Provider Identifier

1154462323

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Registry record

Entity type Individual (Type 1)

Name Mrs. Sharon Gertz Rouillard

Credential N.P.

Sex Female

Practice address 5601 Norris Canyon Rd, Ste 140, San Ramon, CA, 94583

Phone (925) 830-0644

Fax (925) 830-0868

Enumeration date Feb 9, 2007

Last updated in NPPES Jan 11, 2022

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 650324 (CA) Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 17101 (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 Sharon Rouillard?

Sharon Rouillard 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 2022-01-11.