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MICHAEL N SONN, LICENSED CLINICAL SOCIAL WORKER, PC
NPI 1144959370
Community/Behavioral Health in Arcata, CA

Active since June 04, 2022
920 SAMOA BLVD STE 209, ARCATA, CA 95521(707) 940-9528 Get Directions Write a Review

NPPES record last updated: June 22, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 22, 2025, Jun 3, 2025 (2 updates tracked since 2025).

About Michael N Sonn, Licensed Clinical Social Worker, Pc NPPES

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

MICHAEL N SONN, LICENSED CLINICAL SOCIAL WORKER, PC (NPI 1144959370), doing business as Six Rivers Wellness, is a healthcare organization registered as a community/behavioral health in Arcata, California and active in the NPI registry since June 2022. The organization maintains a secondary practice location in Willow Creek and lists Michael Noel Sonn, Therapist/president, as its authorized official.

NPPES Registry Identity

NPI1144959370
Entity TypeOrganization
Primary Taxonomy251S00000X
Legal Business NameMICHAEL N SONN, LICENSED CLINICAL SOCIAL WORKER, PC
Location Address920 SAMOA BLVD STE 209Arcata, CA 95521-6696
Mailing AddressPo Box 1254Willow Creek, CA 95573-1254 · (707) 881-9493
Phone(707) 940-9528
Organization SubpartNo
Authorized OfficialMichael Noel SonnTherapist/president · (707) 881-9493
Enumeration DateJune 4, 2022
Last NPPES UpdateJune 22, 20252 updates tracked since enumeration
NPPES CertifiedJune 22, 2025
✔ NPI 1144959370 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyCommunity/Behavioral HealthAgencies
Taxonomy Code251S00000X
Definition
A private or public agency usually under local government jurisdiction, responsible for assuring the delivery of community based mental health, intellectual disabilities, substance abuse and/or behavioral health services to individuals with those disabilities. Services may range from companion care, respite, transportation, community integration, crisis intervention and stabilization, supported employment, day support, prevocational services, residential support, therapeutic and supportive consultation, environmental modifications, intensive in-home therapy and day treatment, in addition to traditional mental health and behavioral treatment.
Also ListedCounselor · Mental HealthTaxonomy 101YM0800X
920 SAMOA BLVD STE 209, Arcata, CA 95521
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Other Names 1

Doing Business AsSix Rivers Wellness

Secondary Practice Location 1

Location 1114 Orchard LnWillow Creek, CA 95573-9310 · Phone (707) 633-8054

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Michael N Sonn, Licensed Clinical Social Worker, Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to Michael N Sonn, Licensed Clinical Social Worker, PC, which bills Medicare for the services they deliver. They are listed nearest first.

Clinicians, nearest first (2)

Michael Sonn
Clinical Social Worker
NPI 1578091435
114 ORCHARD LN
Willow Creek, CA 95573
(707) 633-8054
✔ PECOS✔ Accepts Medicare25 mi
Serenity Bowen, LCSW
Clinical Social Worker
NPI 1194912550
101 WEST COAST ROAD
Redway, CA 95560
(707) 223-0454
✔ PECOS✔ Accepts Medicare54 mi

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 Michael N Sonn, Licensed Clinical Social Worker, PC's NPI number?

The NPI number for Michael N Sonn, Licensed Clinical Social Worker, PC is 1144959370. It was assigned to this organization in the NPPES registry on June 4, 2022. The provider is doing business as Six Rivers Wellness.

Where is Michael N Sonn, Licensed Clinical Social Worker, PC located?

Michael N Sonn, Licensed Clinical Social Worker, PC is located at 920 Samoa Blvd Ste 209, Arcata, CA 95521. The listed phone number is (707) 940-9528.

What is Michael N Sonn, Licensed Clinical Social Worker, PC's specialty?

The primary specialty registered for this NPI is Community/Behavioral Health with taxonomy code 251S00000X.

Is Michael N Sonn, Licensed Clinical Social Worker, PC enrolled in Medicare?

Yes. Michael N Sonn, Licensed Clinical Social Worker, PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Michael N Sonn, Licensed Clinical Social Worker, PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians, all in Clinical Social Worker, reassign their Medicare billing to Michael N Sonn, Licensed Clinical Social Worker, PC. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Michael N Sonn, Licensed Clinical Social Worker, PC was last updated on June 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months 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.