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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

CHELSEA MARIE VIELHAUER MSW, LCSW
NPI 1912682840
Social Worker - Clinical in Santa Clara, CA

Active since June 19, 2023PECOS EnrolledAccepts Medicare Assignment
5201 GREAT AMERICA PKWY STE 320, SANTA CLARA, CA 95054(323) 205-7088 Get Directions Write a Review

NPPES record last updated: September 2, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 2, 2026, Apr 11, 2026, Aug 9, 2025 and 3 more (6 updates tracked since 2023).

About Chelsea Marie Vielhauer Msw, Lcsw NPPES

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

CHELSEA MARIE VIELHAUER MSW, LCSW (NPI 1912682840) is an individual clinical provider in Santa Clara, California, licensed in California (LCSW114678) and active in the NPI registry since June 2023. She is enrolled in Medicare PECOS and is a graduate of Other (2020).

NPPES Registry Identity

NPI1912682840
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameCHELSEA MARIE VIELHAUERCredential: MSW, LCSW
Location Address5201 GREAT AMERICA PKWY STE 320Santa Clara, CA 95054-1140
Mailing Address1174 Via Verde Unit 1011San Dimas, CA 91773-4401
Phone(323) 205-7088
Sole ProprietorNo
Medical School CMSOtherGraduated 2020
Enumeration DateJune 19, 2023
Last NPPES UpdateSeptember 2, 20266 updates tracked since enumeration
NPPES CertifiedSeptember 2, 2026
✔ NPI 1912682840 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 · LCSW114678
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.
5201 GREAT AMERICA PKWY STE 320, Santa Clara, CA 95054
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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

Chelsea Marie Vielhauer Msw, 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 ID1759867492
PECOS Enrollment IDI20260112003444
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 Chelsea Vielhauer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Moona Medical Group Of California PC
36 mi
Mental Health
505 MONTGOMERY STREET, 10TH FLOOR
San Francisco, CA 94111
  • Reassigned Medicare billing, California enrollment
  • 52 clinicians in this Medicare group
NPI 1023824836 (503) 427-8095

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 95054 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 20

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

MRS. DEBORAH MARIE BOUCHER-CARTER
Marriage & Family Therapist
5201 GREAT AMERICA PKWY STE 320
SANTA CLARA, CA 95054
Santa Clara County (323) 205-7088
MR. WILLIAM BRUCE FAMULARO II
Social Worker (Clinical)
5201 GREAT AMERICA PKWY STE 320
SANTA CLARA, CA 95054
Santa Clara County (323) 205-7088
DANIELLA GALAVIZ LCSW
Social Worker (Clinical)
5201 GREAT AMERICA PKWY STE 320
SANTA CLARA, CA 95054
Santa Clara County (323) 205-7088
MS. PRESCILLA DANIELLE JOHN
Psychologist
5201 GREAT AMERICA PKWY STE 320
SANTA CLARA, CA 95054
Santa Clara County (646) 681-7506
JASON NERIO
Marriage & Family Therapist
5201 GREAT AMERICA PKWY STE 320
SANTA CLARA, CA 95054
Santa Clara County (323) 205-7088
CUCUMBER WELLNESS, INC.
Psychiatry & Neurology (Psychiatry)
5201 GREAT AMERICA PKWY STE 320
SANTA CLARA, CA 95054
Santa Clara County (833) 427-3566
KAYLA BRITTNEY SCHELL LISW
Social Worker (Clinical)
5201 GREAT AMERICA PKWY STE 320
SANTA CLARA, CA 95054
Santa Clara County (323) 205-7088
MRS. DIANA BAINBRIDGE CRNP
Nurse Practitioner (Psychiatric/Mental Health)
5201 GREAT AMERICA PKWY STE 320
SANTA CLARA, CA 95054
Santa Clara County (323) 205-7088

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 Chelsea Vielhauer's NPI number?

The NPI number for Chelsea Vielhauer is 1912682840. It was assigned to this individual provider in the NPPES registry on June 19, 2023.

Where is Chelsea Vielhauer located?

Chelsea Vielhauer practices at 5201 Great America Pkwy Ste 320, Santa Clara, CA 95054. The listed phone number is (323) 205-7088.

What is Chelsea Vielhauer's specialty?

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

Is Chelsea Vielhauer enrolled in Medicare?

Yes. Chelsea Vielhauer 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 Chelsea Vielhauer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Chelsea Vielhauer reassigns Medicare benefits to Moona Medical Group Of California PC (San Francisco, 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 Chelsea Vielhauer'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 Chelsea Vielhauer was last updated on September 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 59 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.