1. Home
  2. Directory
  3. California
  4. Napa
  5. Social Worker
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

ARIANNA MARIA SOUSA LCSW
NPI 1285362152
Social Worker - Clinical in Napa, CA

Active since August 09, 2022PECOS EnrolledAccepts Medicare Assignment
300 HARTLE CT, NAPA, CA 94559(707) 254-1775(707) 254-1779 Get Directions Write a Review

NPPES record last updated: October 15, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 15, 2026, Aug 9, 2022 (2 updates tracked since 2022).

About Arianna Maria Sousa Lcsw NPPES

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

ARIANNA MARIA SOUSA LCSW (NPI 1285362152) is an individual clinical provider in Napa, California, licensed in California (129632) and active in the NPI registry since August 2022. She is enrolled in Medicare PECOS, maintains a secondary practice location in Fairfield, and is a graduate of Other (2021).

NPPES Registry Identity

NPI1285362152
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameARIANNA MARIA SOUSACredential: LCSW
Location Address300 HARTLE CTNapa, CA 94559-4078
Mailing Address4160 Suisun Valley Road Suite E, #4011Fairfield, CA 94534 · (707) 232-8531
Phone(707) 254-1775
Fax(707) 254-1779
Sole ProprietorYes
Medical School CMSOtherGraduated 2021
Enumeration DateAugust 9, 2022
Last NPPES UpdateOctober 15, 20262 updates tracked since enumeration
NPPES CertifiedOctober 15, 2026
✔ NPI 1285362152 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 · 129632
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.
300 HARTLE CT, Napa, CA 94559
Open in Google Maps ↗

Secondary Practice Location 1

Location 14160 Suisun Valley Road Suite E, #4011Fairfield, CA 94534 · Phone (707) 232-8531

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Arianna Maria Sousa Lcsw is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4981121092
PECOS Enrollment IDI20250512001364
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 Arianna Sousa reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Ole Health
Same address
Federally Qualified Health Center (FQHC)
300 HARTLE CT.
Napa, CA 94559
  • Reassigned Medicare billing, California enrollment
  • 116 clinicians in this Medicare group
NPI 1902106198 (707) 254-1774

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94559 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 $65.08 – $192.16
Typical copayment $0.00 (range $16.27 – $48.04)
Most-billed visit code NA
Established Patient
$80.32 typical visit price
range $21.86 – $157.83
Typical copayment $20.08 (range $5.46 – $39.45)
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.

KAREN MERZENICH CNM, WHNP
Advanced Practice Midwife
300 HARTLE CT
NAPA, CA 94559
Napa County (707) 254-1775
JAMIE BONGIOVI LCSW
Social Worker
300 HARTLE CT
NAPA, CA 94559
Napa County (707) 254-1775
DR. ROBERT JAY HOPKINS MD, MPH & TM
Internal Medicine
300 HARTLE CT
NAPA, CA 94559
Napa County (707) 254-1775
RICARDO MENDEZ PA-C
Physician Assistant
300 HARTLE CT
NAPA, CA 94559
Napa County (707) 254-1775
ANGEL AGUILERA MD
Psychiatry & Neurology (Psychiatry)
300 HARTLE CT
NAPA, CA 94559
Napa County (707) 254-1775
DENISSE ALEMAN
Social Worker
300 HARTLE CT
NAPA, CA 94559
Napa County (707) 254-1775
BRIANNE NICOLE YESKEY PA-C
Physician Assistant
300 HARTLE CT
NAPA, CA 94559
Napa County (707) 254-1775
FARAAZ CHEKENI MD, PHD
Pediatrics
300 HARTLE CT
NAPA, CA 94559
Napa County (707) 254-1775

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 Arianna Sousa's NPI number?

The NPI number for Arianna Sousa is 1285362152. It was assigned to this individual provider in the NPPES registry on August 9, 2022.

Where is Arianna Sousa located?

Arianna Sousa practices at 300 Hartle Ct, Napa, CA 94559. The listed phone number is (707) 254-1775.

What is Arianna Sousa's specialty?

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

Is Arianna Sousa enrolled in Medicare?

Yes. Arianna Sousa is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Arianna Sousa's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Arianna Sousa reassigns Medicare benefits to Ole Health (Napa, 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 Arianna Sousa'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 Arianna Sousa was last updated on October 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 days 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.