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MARGARITA MARTINEZ
NPI 1336663822
Counselor - Mental Health in Oxnard, CA

Active since July 27, 2017PECOS Enrolled
1911 WILLIAMS DR STE 150, OXNARD, CA 93036(805) 276-6242 Get Directions Write a Review

NPPES record last updated: October 14, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 23, 2022, Jul 27, 2017 (2 updates tracked since 2017).

About Margarita Martinez NPPES

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

MARGARITA MARTINEZ (NPI 1336663822) is an individual mental health provider in Oxnard, California and active in the NPI registry since July 2017. She is enrolled in Medicare PECOS and maintains 4 additional practice locations.

NPPES Registry Identity

NPI1336663822
Entity TypeIndividualFemale
Primary Taxonomy101YM0800X
Provider Legal NameMARGARITA MARTINEZ
Location Address1911 WILLIAMS DR STE 150Oxnard, CA 93036-2612
Mailing Address943 Mckevett RdSanta Paula, CA 93060-1333
Phone(805) 276-6242
Sole ProprietorNo
Enumeration DateJuly 27, 2017
Last NPPES UpdateOctober 14, 20252 updates tracked since enumeration
NPPES CertifiedOctober 14, 2025
✔ NPI 1336663822 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
1911 WILLIAMS DR STE 150, Oxnard, CA 93036
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Secondary Practice Locations 4

Location 1254 W Harvard Blvd Ste BSanta Paula, CA 93060-3920 · Phone (805) 229-0200
Location 21334 E Main StSanta Paula, CA 93060-2926 · Phone (805) 933-1122
Location 3845 N 10th St Ste 3Santa Paula, CA 93060-1348 · Phone (805) 525-0215
Location 4828 W Ventura StFillmore, CA 93015-1876 · Phone (805) 524-2000

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Margarita Martinez 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.

Medicare Billing Reassignment

Medicare enrollment records show Margarita Martinez reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

County Of Ventura
Same address
Community/Behavioral Health
1911 WILLIAMS DR STE 165
Oxnard, CA 93036
  • Reassigned Medicare billing, California enrollment
  • 710 clinicians in this Medicare group
NPI 1104048743 (805) 981-4233

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

MS. DALE ANN WAGNER MFT
Counselor (Mental Health)
1911 WILLIAMS DR STE 150
OXNARD, CA 93036
Ventura County (805) 981-8484
ANGELA TINOCO LCSW
Social Worker (Clinical)
1911 WILLIAMS DR STE 150
OXNARD, CA 93036
Ventura County (805) 981-8460
JAMIE DARLENE ARCHULETA
Case Manager/Care Coordinator
1911 WILLIAMS DR STE 150
OXNARD, CA 93036
Ventura County (805) 981-8460
VALERIA ANDRADE
Marriage & Family Therapist
1911 WILLIAMS DR STE 150
OXNARD, CA 93036
Ventura County (805) 981-8460
ELIZABETH EXELL LCSW
Counselor (Mental Health)
1911 WILLIAMS DR STE 150
OXNARD, CA 93036
Ventura County (805) 981-8484
ALBERT CHEN M.D.
Psychiatry & Neurology (Psychiatry)
1911 WILLIAMS DR STE 150
OXNARD, CA 93036
Ventura County (805) 981-8460
ANDREA N. COVARRUBIAS LCSW
Social Worker (Clinical)
1911 WILLIAMS DR STE 150
OXNARD, CA 93036
Ventura County (805) 981-8460
JESSICA MALDONADO AVILA-PEREZ
Marriage & Family Therapist
1911 WILLIAMS DR STE 150
OXNARD, CA 93036
Ventura County (805) 981-8460

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 Margarita Martinez's NPI number?

The NPI number for Margarita Martinez is 1336663822. It was assigned to this individual provider in the NPPES registry on July 27, 2017.

Where is Margarita Martinez located?

Margarita Martinez practices at 1911 Williams Dr Ste 150, Oxnard, CA 93036. The listed phone number is (805) 276-6242.

What is Margarita Martinez's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

Is Margarita Martinez enrolled in Medicare?

Yes. Margarita Martinez is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Margarita Martinez's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Margarita Martinez reassigns Medicare benefits to County Of Ventura (Oxnard, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Margarita Martinez's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Margarita Martinez 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 12 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.