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JONI ELIZABETH MAHON LCSW
NPI 1801129069
Social Worker - Clinical in Oxnard, CA

Active since September 04, 2009PECOS Enrolled
1911 WILLIAMS DR STE 210, OXNARD, CA 93036(805) 981-3330 Get Directions Write a Review

NPPES record last updated: October 14, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Oct 8, 2025, Aug 20, 2024, Jul 23, 2024 and 5 more (8 updates tracked since 2018).

About Joni Elizabeth Mahon Lcsw NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JONI ELIZABETH MAHON LCSW (NPI 1801129069) is an individual clinical provider in Oxnard, California, licensed in California (76126) and active in the NPI registry since September 2009. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1801129069
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameJONI ELIZABETH MAHONCredential: LCSW
Location Address1911 WILLIAMS DR STE 210Oxnard, CA 93036-2612
Mailing Address1911 Williams Dr Ste 210Oxnard, CA 93036-2612
Phone(805) 981-3330
Sole ProprietorNo
Enumeration DateSeptember 4, 2009
Last NPPES UpdateOctober 14, 20258 updates tracked since enumeration
NPPES CertifiedOctober 14, 2025
✔ NPI 1801129069 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in CA · 76126
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
1911 WILLIAMS DR STE 210, Oxnard, CA 93036
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Joni Elizabeth Mahon Lcsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer– Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93036 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$0.00 typical visit price
range $62.32 – $185.36
Typical copayment $0.00 (range $15.58 – $46.34)
Most-billed visit code NA
Established Patient
$77.11 typical visit price
range $20.68 – $151.85
Typical copayment $19.27 (range $5.17 – $37.96)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

BRADLEY JAMES WEAVER
Peer Specialist
1911 WILLIAMS DR STE 210
OXNARD, CA 93036
Ventura County (805) 981-3330
ANA KAREN GUTIERREZ
Day Training/Habilitation Specialist
1911 WILLIAMS DR STE 210
OXNARD, CA 93036
Ventura County (805) 824-2056
MRS. SARAH LINDA KRIM O'HALLORAN LMFT
Marriage & Family Therapist
1911 WILLIAMS DR STE 210
OXNARD, CA 93036
Ventura County (805) 981-9213
CIERA JOANN FOLMAN
Counselor (Addiction (Substance Use Disorder))
1911 WILLIAMS DR STE 210
OXNARD, CA 93036
Ventura County (330) 883-9244
KIMBERLEY VICTORIA QUESADA-ALBELO
Day Training/Habilitation Specialist
1911 WILLIAMS DR STE 210
OXNARD, CA 93036
Ventura County (805) 981-6830
MRS. ANGELICA CRUZ RAMIREZ ADS STUDENT
Case Manager/Care Coordinator
1911 WILLIAMS DR STE 210
OXNARD, CA 93036
Ventura County (805) 981-1422
ROSALINA ROSALES
Student in an Organized Health Care Education/Training Program
1911 WILLIAMS DR STE 210
OXNARD, CA 93036
Ventura County (805) 981-4221
JENNIFER ROSE ARSENAULT
Day Training/Habilitation Specialist
1911 WILLIAMS DR STE 210
OXNARD, CA 93036
Ventura County (805) 981-6830

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Joni Mahon's NPI number?

The NPI number for Joni Mahon is 1801129069. It was assigned to this individual provider in the NPPES registry on September 4, 2009.

Where is Joni Mahon located?

Joni Mahon practices at 1911 Williams Dr Ste 210, Oxnard, CA 93036. The listed phone number is (805) 981-3330.

What is Joni Mahon's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Joni Mahon enrolled in Medicare?

Yes. Joni Mahon is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Joni Mahon was last updated on October 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.