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MARILYN RIVAS LCSW
NPI 1043715949
Social Worker - Clinical in Whittier, CA

Active since March 24, 2018PECOS Enrolled
6737 BRIGHT AVE STE B9, WHITTIER, CA 90601(657) 799-1844 Get Directions Write a Review

NPPES record last updated: July 27, 2022. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 27, 2022, Mar 24, 2018 (2 updates tracked since 2018).

About Marilyn Rivas Lcsw NPPES

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

MARILYN RIVAS LCSW (NPI 1043715949) is an individual clinical provider in Whittier, California, licensed in California (81992) and active in the NPI registry since March 2018. She is enrolled in Medicare PECOS and maintains a secondary practice location in Pasadena.

NPPES Registry Identity

NPI1043715949
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMARILYN RIVASCredential: LCSW
Location Address6737 BRIGHT AVE STE B9Whittier, CA 90601-4315
Mailing Address6737 Bright Ave Ste B9Whittier, CA 90601-4315 · (657) 799-1844
Phone(657) 799-1844
Sole ProprietorNo
Enumeration DateMarch 24, 2018
Last NPPES UpdateJuly 27, 20222 updates tracked since enumeration
NPPES CertifiedJuly 27, 2022
✔ NPI 1043715949 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 · 81992
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.
6737 BRIGHT AVE STE B9, Whittier, CA 90601
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Secondary Practice Location 1

Location 186 Orange PlPasadena, CA 91105-2000 · Phone (323) 513-8328

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Marilyn Rivas 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.

Medicare Billing Reassignments

2

Medicare enrollment records show Marilyn Rivas reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Jwch Institute, Inc.
5.5 mi
Federally Qualified Health Center (FQHC)
12360 E FIRESTONE BLVD
Norwalk, CA 90650
  • Reassigned Medicare billing, California enrollment
  • 138 clinicians in this Medicare group
NPI 1386708634 (562) 281-0305
Grow Healthcare Group PC
317 mi
Mental Health
99 S ALMADEN BLVD STE 600
San Jose, CA 95113
  • Reassigned Medicare billing, California enrollment
  • 3,139 clinicians in this Medicare group
NPI 1154994846 (408) 402-4385

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

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Psychotherapy, 1 hour 90837
Psychotherapy is a therapeutic interaction or treatment between a trained professional and a patient. In a 1-hour session, you'll talk about your feelings, thoughts, and behaviors to help identify and manage mental health issues. This process aids in personal growth, healing, and improved well-being.
341 services41 patients
Psychotherapy, 30 minutes 90832
Psychotherapy is a therapeutic interaction or treatment between a trained professional and a patient. In a 30-minute session, the therapist helps you explore feelings, thoughts, and behaviors to better understand yourself and manage life's challenges.
54 services24 patients
Psychotherapy, 45 minutes 90834
Psychotherapy is a treatment method where you converse with a therapist about your thoughts, feelings, and behaviors. In a 45-minute session, the therapist assists you in understanding and managing your mental health concerns, improving emotional wellness, and promoting personal growth.
50 services24 patients
Psychotherapy for crisis, first hour 90839
Psychotherapy for crisis is a supportive service provided during times of intense distress. In the first hour, the therapist will help you express your feelings, understand the crisis better, and work on immediate coping strategies. This is aimed at reducing stress and promoting emotional well-being.
12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90601 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 $62.96 – $187.60
Typical copayment $0.00 (range $15.74 – $46.90)
Most-billed visit code NA
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
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

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

RIVAS THERAPY GROUP LLC
Social Worker (Clinical)
6737 BRIGHT AVE STE B9
WHITTIER, CA 90601
Los Angeles County (213) 500-3446

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 Marilyn Rivas's NPI number?

The NPI number for Marilyn Rivas is 1043715949. It was assigned to this individual provider in the NPPES registry on March 24, 2018.

Where is Marilyn Rivas located?

Marilyn Rivas practices at 6737 Bright Ave Ste B9, Whittier, CA 90601. The listed phone number is (657) 799-1844.

What is Marilyn Rivas's specialty?

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

Is Marilyn Rivas enrolled in Medicare?

Yes. Marilyn Rivas is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Marilyn Rivas's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marilyn Rivas reassigns Medicare benefits to 2 organizations: Jwch Institute, Inc. (Norwalk, CA) and Grow Healthcare Group PC (San Jose, CA). Each 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 Marilyn Rivas'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 Marilyn Rivas was last updated on July 27, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.