DR. TANYA S. CHASE PSY.D.
NPI 1154485506
Psychologist in Napa, CA

Active since December 20, 2006PECOS EnrolledAccepts Medicare Assignment
2100 NAPA VALLEJO HWY, NAPA, CA 94558(707) 253-5000(707) 253-5097 Get Directions Write a Review

NPPES record last updated: August 2, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 2, 2024, Aug 17, 2016 (2 updates tracked since 2016).

About Dr. Tanya S. Chase Psy.d. NPPES

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

DR. TANYA S. CHASE PSY.D. (NPI 1154485506) is an individual psychologist in Napa, California, licensed in California (35132) and active in the NPI registry since December 2006. She is enrolled in Medicare PECOS and is a graduate of Other (2014).

NPPES Registry Identity

NPI1154485506
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameDR. TANYA S. CHASECredential: PSY.D.
Location Address2100 NAPA VALLEJO HWYNapa, CA 94558
Mailing Address2100 Napa Vallejo HwyNapa, CA 94558 · (415) 863-3883
Fax(707) 253-5097
Sole ProprietorNo
Medical School CMSOtherGraduated 2014
Enumeration DateDecember 20, 2006
Last NPPES UpdateAugust 2, 20242 updates tracked since enumeration
✔ NPI 1154485506 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
Licenses✔ Licensed in CA · 35132✔ Licensed in CA · 94020865✔ Licensed in CA · RPS 2012698
Definition
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
Also ListedCounselorTaxonomy 101Y00000X · License RPS 2012698 (CA)
Also ListedCounselor · Addiction (Substance Use Disorder)Taxonomy 101YA0400X · License C608111303 (CA)
2100 NAPA VALLEJO HWY, Napa, CA 94558

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Tanya S. Chase Psy.d. 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 ID2163963273
PECOS Enrollment IDI20240917001241
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 Tanya Chase reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Psychiatric Hospital
2100 NAPA VALLEJO HWY
Napa, CA 94558
  • Reassigned Medicare billing, California enrollment
  • 755 clinicians in this Medicare group

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

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

Substance Abuse Rehabilitation Facility
2100 NAPA VALLEJO HWY, M-1 M-2
NAPA, CA 94558
Psychologist (Clinical)
2100 NAPA VALLEJO HWY
NAPA, CA 94558
Psychologist
2100 NAPA VALLEJO HWY
NAPA, CA 94558
Psychologist
2100 NAPA VALLEJO HWY
NAPA, CA 94558
Psychologist (Clinical)
2100 NAPA VALLEJO HWY
NAPA, CA 94558
Internal Medicine
2100 NAPA VALLEJO HWY
NAPA, CA 94558
Social Worker (Clinical)
2100 NAPA VALLEJO HWY
NAPA, CA 94558
Psychologist
2100 NAPA VALLEJO HWY
NAPA, CA 94558

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 Tanya Chase's NPI number?

The NPI number for Tanya Chase is 1154485506. It was assigned to this individual provider in the NPPES registry on December 20, 2006.

Where is Tanya Chase located?

Tanya Chase practices at 2100 Napa Vallejo Hwy, Napa, CA 94558. The listed phone number is (707) 253-5000.

What is Tanya Chase's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

Is Tanya Chase enrolled in Medicare?

Yes. Tanya Chase 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.

Which organization bills Medicare for Tanya Chase's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Tanya Chase reassigns Medicare benefits to Department Of State Hospitals (Napa, CA). 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 Tanya Chase's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Tanya Chase was last updated on August 2, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.