MS. LIBBY STILL RIVERSTONE-HOWE MSW,LCSW
NPI 1104003920
Social Worker - Clinical in Redwood City, CA

Q: What is Libby Riverstone-howe's NPI number?

The NPI number for Libby Riverstone-howe is 1104003920. It was assigned to this individual provider in the NPPES registry on January 23, 2008.

Q: What is Libby Riverstone-howe's specialty?

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

Active since January 23, 2008PECOS Enrolled

1775 WOODSIDE RD STE 203, REDWOOD CITY, CA 94061(650) 456-1030 Get Directions Write a Review

NPPES record last updated: October 4, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Ms. Libby Still Riverstone-howe Msw,lcsw NPPES

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

MS. LIBBY STILL RIVERSTONE-HOWE MSW,LCSW (NPI 1104003920) is an individual clinical provider in Redwood City, California, licensed in California (80468) and active in the NPI registry since January 2008. She is enrolled in Medicare PECOS and maintains a secondary practice location in Oakland.

NPPES Registry Identity

NPI1104003920

Entity TypeIndividualFemale

Primary Taxonomy1041C0700X

Provider Legal NameMS. LIBBY STILL RIVERSTONE-HOWECredential: MSW,LCSW

Location Address1775 WOODSIDE RD STE 203Redwood City, CA 94061-3454

Mailing Address4368 Lincoln AveOakland, CA 94602-2529 · (510) 531-3111 · Fax (510) 530-8083

Phone(650) 456-1030

Sole ProprietorNo

Enumeration DateJanuary 23, 2008

Last NPPES UpdateOctober 4, 2024

NPPES CertifiedOctober 4, 2024

✔ NPI 1104003920 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 · 80468

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.

1775 WOODSIDE RD STE 203, Redwood City, CA 94061

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Secondary Practice Location 1

Location 14368 Lincoln AveOakland, CA 94602-2529 · Phone (510) 531-3111 ext. 351 · Fax (510) 530-8083

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ms. Libby Still Riverstone-howe Msw,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

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

Cypress Health Licensed Clinical Social Worker Inc.

Same address

Mental Health (Including Community Mental Health Center)

1775 WOODSIDE RD STE 301
Redwood City, CA 94061

Reassigned Medicare billing, California enrollment
10 clinicians in this Medicare group

NPI 1972386779 (650) 564-4878

Sud Specialty Group - Ca

14 mi

Addiction Medicine

4633 OLD IRONSIDES DR STE 304
Santa Clara, CA 95054

Reassigned Medicare billing, California enrollment
1,607 clinicians in this Medicare group

NPI 1972138238 (323) 205-7088

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 94061 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 $69.00 – $202.35

Typical copayment $0.00 (range $17.25 – $50.58)

Most-billed visit code NA

Established Patient

$84.91 typical visit price

range $23.44 – $166.46

Typical copayment $21.22 (range $5.86 – $41.61)

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 5

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

APRIL ELLIS LCSW

Social Worker (Clinical)