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SYNDE ACKS, PSY.D, PROFESSIONAL INC.
NPI 1215622337
Clinic/Center - Mental Health (Including Community Mental Health Center) in Sebastopol, CA

Active since April 05, 2023
435 PETALUMA AVE STE 136, SEBASTOPOL, CA 95472(707) 387-0245 Get Directions Write a Review

NPPES record last updated: May 5, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 5, 2023, Apr 5, 2023 (2 updates tracked since 2023).

About Synde Acks, Psy.d, Professional Inc. NPPES

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

SYNDE ACKS, PSY.D, PROFESSIONAL INC. (NPI 1215622337) is a healthcare organization registered as a mental health (including community mental health center) in Sebastopol, California and active in the NPI registry since April 2023. The organization lists Cynthia Lynne Acks-stewart, Owner, as its authorized official.

NPPES Registry Identity

NPI1215622337
Entity TypeOrganization
Primary Taxonomy261QM0801X
Legal Business NameSYNDE ACKS, PSY.D, PROFESSIONAL INC.
Location Address435 PETALUMA AVE STE 136Sebastopol, CA 95472-4273
Mailing Address435 Petaluma Ave Ste 136Sebastopol, CA 95472-4273 · (707) 387-0245
Phone(707) 387-0245
Organization SubpartNo
Authorized OfficialCynthia Lynne Acks-stewartOwner · (707) 480-7119
Enumeration DateApril 5, 2023
Last NPPES UpdateMay 5, 20232 updates tracked since enumeration
NPPES CertifiedMay 5, 2023
✔ NPI 1215622337 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · Mental Health (Including Community Mental Health Center)Ambulatory Health Care Facilities
Taxonomy Code261QM0801X
435 PETALUMA AVE STE 136, Sebastopol, CA 95472
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Synde Acks, Psy.d, Professional Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Synde Acks, Psy.D, Professional Inc., which bills Medicare for the services this clinician delivers.

Clinician (1)

Cynthia Acks-Stewart
Clinical Psychologist
NPI 1205966728
435 PETALUMA AVE STE 136
Sebastopol, CA 95472
(707) 387-0245
✔ PECOS✔ Accepts MedicareSame address

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 Synde Acks, Psy.D, Professional Inc.'s NPI number?

The NPI number for Synde Acks, Psy.D, Professional Inc. is 1215622337. It was assigned to this organization in the NPPES registry on April 5, 2023.

Where is Synde Acks, Psy.D, Professional Inc. located?

Synde Acks, Psy.D, Professional Inc. is located at 435 Petaluma Ave Ste 136, Sebastopol, CA 95472. The listed phone number is (707) 387-0245.

What is Synde Acks, Psy.D, Professional Inc.'s specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Mental Health (Including Community Mental Health Center), with taxonomy code 261QM0801X.

Is Synde Acks, Psy.D, Professional Inc. enrolled in Medicare?

Yes. Synde Acks, Psy.D, Professional Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Synde Acks, Psy.D, Professional Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Clinical Psychologist) reassigns their Medicare billing to Synde Acks, Psy.D, Professional Inc.. 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 Synde Acks, Psy.D, Professional Inc. was last updated on May 5, 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.