ARIEANA CASTELLANOS LCSW
NPI 1023591344
Social Worker in Oakland, CA
About Arieana Castellanos Lcsw NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ARIEANA CASTELLANOS LCSW (NPI 1023591344) is an individual social worker in Oakland, California, licensed in California (112575) and active in the NPI registry since September 2018. She is enrolled in Medicare PECOS and maintains a secondary practice location in Dublin.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Arieana Castellanos Lcsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Arieana Castellanos reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Santa Clara, CA 95054
- Reassigned Medicare billing, California enrollment
- 1,607 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Arieana Castellanos's NPI number?
The NPI number for Arieana Castellanos is 1023591344. It was assigned to this individual provider in the NPPES registry on September 12, 2018.
Where is Arieana Castellanos located?
Arieana Castellanos practices at 3001 Intrnl Blvd, Oakland, CA 94601. The listed phone number is (510) 881-5921.
What is Arieana Castellanos's specialty?
The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.
Is Arieana Castellanos enrolled in Medicare?
Yes. Arieana Castellanos is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Arieana Castellanos's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Arieana Castellanos reassigns Medicare benefits to Sud Specialty Group - Ca (Santa Clara, 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 Arieana Castellanos'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 Arieana Castellanos was last updated on February 21, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Arieana Castellanos, LCSW · NPI 1023591344
Social Worker provider in Oakland, California. Individual provider, active in the CMS NPPES registry since September 12, 2018.
## Identity
- **NPI:** 1023591344 (Entity type: Individual)
- **Enumerated:** September 12, 2018
- **Primary specialty:** Social Worker · taxonomy 104100000X
- **State license:** 112575 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3001 INTRNL BLVD, Oakland, CA 94601-2203
- **Phone:** (510) 881-5921
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Sud Specialty Group - Ca (NPI 1972138238, Santa Clara, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 21, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1023591344) · Data from the CMS NPPES public registry.