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

CATHERINE ANN BAYER PHD
NPI 1932195765
Psychologist - Clinical in Santa Rosa, CA

Q: What is Catherine Bayer's NPI number?

The NPI number for Catherine Bayer is 1932195765. It was assigned to this individual provider in the NPPES registry on September 27, 2005. The provider is also known as Catherine Bayer Phd.

Q: What is Catherine Bayer's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Q: When was this NPI record last updated?

The NPPES record for Catherine Bayer was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 41 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.

Active since September 27, 2005PECOS EnrolledAccepts Medicare Assignment

4605 HIDDEN OAKS RD, SANTA ROSA, CA 95404(707) 546-8209 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 13, 2026, Jan 9, 2020 (2 updates tracked since 2020).

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About Catherine Ann Bayer Phd NPPES

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

CATHERINE ANN BAYER PHD (NPI 1932195765) is an individual clinical provider in Santa Rosa, California, licensed in California (PSY9696) and active in the NPI registry since September 2005. She is enrolled in Medicare PECOS and is a graduate of Other (1984).

NPPES Registry Identity

NPI1932195765

Entity TypeIndividualFemale

Primary Taxonomy103TC0700X

Provider Legal NameCATHERINE ANN BAYERCredential: PHD

Location Address4605 HIDDEN OAKS RDSanta Rosa, CA 95404-9541

Mailing AddressPo Box 2453Santa Rosa, CA 95405-0453 · (707) 546-8209

Phone(707) 546-8209

Sole ProprietorNo

Medical School CMSOtherGraduated 1984

Enumeration DateSeptember 27, 2005

Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration

NPPES CertifiedJanuary 9, 2020

✔ NPI 1932195765 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers

Taxonomy Code103TC0700X

License✔ Licensed in CA · PSY9696

Definition

A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

Also ListedMarriage & Family TherapistTaxonomy 106H00000X · License MFC12476 INACTIVE (CA)

4605 HIDDEN OAKS RD, Santa Rosa, CA 95404

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Other Names 1

Professional Name (2)Catherine Bayer Phd

Other Identifiers 4

Other6137427Usbh

Other1935063First Health

Other0005468708Aetna

MedicaidPSY096961CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Catherine Ann Bayer Phd 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 ID4880640945

PECOS Enrollment IDI20050322001229

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95404 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

$187.01 typical visit price

range $63.04 – $187.01

Typical copayment $46.75 (range $15.76 – $46.75)

Most-billed visit code 99205

Established Patient

$109.88 typical visit price

range $21.02 – $153.40

Typical copayment $27.47 (range $5.25 – $38.35)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Catherine Bayer's NPI number?

The NPI number for Catherine Bayer is 1932195765. It was assigned to this individual provider in the NPPES registry on September 27, 2005. The provider is also known as Catherine Bayer Phd.

Where is Catherine Bayer located?

Catherine Bayer practices at 4605 Hidden Oaks Rd, Santa Rosa, CA 95404. The listed phone number is (707) 546-8209.

What is Catherine Bayer's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Is Catherine Bayer enrolled in Medicare?

Yes. Catherine Bayer 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.

When was this NPI record last updated?

The NPPES record for Catherine Bayer was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 41 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.