DR. SHANNON GRETHEL PSY.D.
NPI 1629256607
Clinical Neuropsychologist in Vallejo, CA

Q: What is Shannon Grethel's NPI number?

The NPI number for Shannon Grethel is 1629256607. It was assigned to this individual provider in the NPPES registry on February 1, 2008.

Q: What is Shannon Grethel's specialty?

The primary specialty registered for this NPI is Clinical Neuropsychologist with taxonomy code 103G00000X.

Q: Is Shannon Grethel enrolled in Medicare?

No. Shannon Grethel has opted out of Medicare through January 1, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

Q: When was this NPI record last updated?

The NPPES record for Shannon Grethel was last updated on May 22, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.

Active since February 01, 2008Opted out of Medicare · through Jan 1, 2028

975 SERENO DR, KFRC- NEUROPSYCHOLOGY DEPARTMENT, VALLEJO, CA 94589(832) 370-7960 Get Directions Write a Review

NPPES record last updated: May 22, 2009. Verified against the NPPES registry weekly; last sync: August 16, 2026.

On this page

About Dr. Shannon Grethel Psy.d. NPPES

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

DR. SHANNON GRETHEL PSY.D. (NPI 1629256607) is an individual clinical neuropsychologist in Vallejo, California, licensed in California (PSY21763) and active in the NPI registry since February 2008. She has opted out of Medicare through January 1, 2028.

NPPES Registry Identity

NPI1629256607

Entity TypeIndividualFemale

Primary Taxonomy103G00000X

Provider Legal NameDR. SHANNON GRETHELCredential: PSY.D.

Location Address975 SERENO DR, KFRC- NEUROPSYCHOLOGY DEPARTMENTVallejo, CA 94589-2441

Mailing Address975 Sereno Dr, Kfrc- Neuropsychology DepartmentVallejo, CA 94589-2441 · (707) 651-4547

Phone(832) 370-7960

Sole ProprietorYes

Enumeration DateFebruary 1, 2008

Last NPPES UpdateMay 22, 2009

✔ NPI 1629256607 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinical NeuropsychologistBehavioral Health & Social Service Providers

Taxonomy Code103G00000X

License✔ Licensed in CA · PSY21763

Definition

A clinical psychologist who applies principles of assessment and intervention based upon the scientific study of human behavior as it relates to normal and abnormal functioning of the central nervous system. The specialty is dedicated to enhancing the understanding of brain-behavior relationships and the application of such knowledge to human problems.

975 SERENO DR, Vallejo, CA 94589

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Shannon Grethel Psy.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from January 1, 2024 through January 1, 2028.

Opt-Out Effective DateJanuary 1, 2024

Opt-Out In Effect ThroughJanuary 1, 2028Opt-out affidavits renew automatically every two years unless cancelled

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.

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