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JONAH BAYER
NPI 1235809096
Counselor - Mental Health in Williamstown, MA

Active since September 14, 2021PECOS Enrolled
105 HARRISON AVE, WILLIAMSTOWN, MA 01267(413) 599-3420 Get Directions Write a Review

NPPES record last updated: October 1, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Jonah Bayer NPPES

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

JONAH BAYER (NPI 1235809096) is an individual mental health provider in Williamstown, Massachusetts, licensed in Massachusetts (LMHC10003468) and active in the NPI registry since September 2021. He is enrolled in Medicare PECOS and is a graduate of Other (2022).

NPPES Registry Identity

NPI1235809096
Entity TypeIndividualMale
Primary Taxonomy101YM0800X
Provider Legal NameJONAH BAYER
Location Address105 HARRISON AVEWilliamstown, MA 01267-2237
Mailing Address700 Main St Suite 1 #1011Great Barrington, MA 01230 · (413) 599-3420
Phone(413) 599-3420
Sole ProprietorYes
Medical School CMSOtherGraduated 2022
Enumeration DateSeptember 14, 2021
Last NPPES UpdateOctober 1, 2025
NPPES CertifiedOctober 1, 2025
✔ NPI 1235809096 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
License✔ Licensed in MA · LMHC10003468
105 HARRISON AVE, Williamstown, MA 01267
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Harvard Pilgrim Health Care.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Jonah Bayer is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5597224154
PECOS Enrollment IDI20260825002495
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 Jonah Bayer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Sondermind Provider Network LLC
1,659 mi
Clinical
1738 WYNKOOP ST STE 303
Denver, CO 80202
  • Reassigned Medicare billing, Massachusetts enrollment
  • 94 clinicians in this Medicare group
NPI 1760854442 (844) 843-7279

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 Jonah Bayer's NPI number?

The NPI number for Jonah Bayer is 1235809096. It was assigned to this individual provider in the NPPES registry on September 14, 2021.

Where is Jonah Bayer located?

Jonah Bayer practices at 105 Harrison Ave, Williamstown, MA 01267. The listed phone number is (413) 599-3420.

What is Jonah Bayer's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

Is Jonah Bayer enrolled in Medicare?

Yes. Jonah Bayer is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Jonah Bayer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jonah Bayer reassigns Medicare benefits to Sondermind Provider Network LLC (Denver, CO). 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 Jonah Bayer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Jonah Bayer accept?

Health plans from Harvard Pilgrim Health Care list Jonah Bayer as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Jonah Bayer was last updated on October 1, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.