OSCAR VILLARREAL VILLASIMON LCSW
NPI 1841415148
Social Worker - Clinical in Palo Alto, CA

Q: What is Oscar Villasimon's NPI number?

The NPI number for Oscar Villasimon is 1841415148. It was assigned to this individual provider in the NPPES registry on April 13, 2007.

Q: What is Oscar Villasimon's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Oscar Villasimon was last updated on April 14, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.

Active since April 13, 2007PECOS Enrolled

451 LYTTON AVE, PALO ALTO, CA 94301(714) 604-7834 Get Directions Write a Review

NPPES record last updated: April 14, 2014. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Oscar Villarreal Villasimon Lcsw NPPES

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

OSCAR VILLARREAL VILLASIMON LCSW (NPI 1841415148) is an individual clinical provider in Palo Alto, California, licensed in California (LCS 26505) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1841415148

Entity TypeIndividualMale

Primary Taxonomy1041C0700X

Provider Legal NameOSCAR VILLARREAL VILLASIMONCredential: LCSW

Location Address451 LYTTON AVEPalo Alto, CA 94301-1535

Mailing Address451 Lytton AvePalo Alto, CA 94301-1535

Phone(714) 604-7834

Sole ProprietorNo

Enumeration DateApril 13, 2007

Last NPPES UpdateApril 14, 2014

✔ NPI 1841415148 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 · LCS 26505

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.

451 LYTTON AVE, Palo Alto, CA 94301

Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Oscar Villarreal Villasimon 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 Reassignment

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

Regents Of The Univ Of Ca

79 mi

Medical Microbiology

3146 TUPPER HALL
Davis, CA 95616

Reassigned Medicare billing, California enrollment
2,570 clinicians in this Medicare group

NPI 1053304071 (530) 752-9402

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 94301 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 $70.37 – $206.04

Typical copayment $0.00 (range $17.59 – $51.51)

Most-billed visit code NA

Established Patient

$86.56 typical visit price

range $23.96 – $169.60

Typical copayment $21.64 (range $5.99 – $42.40)

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 7

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

DR. SUSAN L EDELMAN MD

Psychiatry & Neurology (Psychiatry)