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

Ms. Julie K Marhefka, PMHNP-BC

Psychiatric/Mental Health Nurse Practitioner in Oceanside, CA · enumerated 2010 · practices at Mental Health Systems, Inc..

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

National Provider Identifier

1699077123

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Registry record

Entity type Individual (Type 1)

Name Ms. Julie K Marhefka

Credential PMHNP-BC

Sex Female

Practice address Oceanside, CA, 92058

Phone (760) 712-3535

Enumeration date Dec 5, 2010

Last updated in NPPES Apr 3, 2023

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

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 401236 (CA) Secondary

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 95009591 (CA) Primary

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

Where does Julie Marhefka practice?

The practice location on file with NPPES is in Oceanside, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Julie Marhefka?

The National Provider Identifier (NPI) for Julie Marhefka is 1699077123, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Mental Health Systems, Inc. Adult Mental Health Clinic/Center · Oceanside, CA NPI 1598847055 Margo Randolph Clinical Social Worker · Oceanside, CA NPI 1306143441 Cayla Steffy Professional Counselor · Oceanside, CA NPI 1548658909 Wences Savaiki Clinical Social Worker · Oceanside, CA NPI 1205345261 Lorissa Prescott Peer Specialist · Oceanside, CA NPI 1750887477 Danica Barnicle Mental Health Counselor · Oceanside, CA NPI 1326530445 Johnathan Mendoza Case Manager/Care Coordinator · Oceanside, CA NPI 1124510243 Breanne Solis Licensed Vocational Nurse · Oceanside, CA NPI 1306316682

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-04-03.