DR. GREGORY ERNEST KOCH PSY.D.
NPI 1730180852
Psychologist - Group Psychotherapy in San Diego, CA

Q: What is Gregory Koch's NPI number?

The NPI number for Gregory Koch is 1730180852. It was assigned to this individual provider in the NPPES registry on August 10, 2005.

Q: What is Gregory Koch's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Group Psychotherapy, with taxonomy code 103TP2701X.

Q: Is Gregory Koch enrolled in Medicare?

No. Gregory Koch has opted out of Medicare through July 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 Gregory Koch was last updated on September 11, 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.

Active since August 10, 2005Opted out of Medicare · through Jul 1, 2028

4081 STEPHENS ST, SAN DIEGO, CA 92103(888) 588-7836(888) 588-7836 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: September 27, 2026.

On this page

About Dr. Gregory Ernest Koch Psy.d. NPPES

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

DR. GREGORY ERNEST KOCH PSY.D. (NPI 1730180852) is an individual group psychotherapy provider in San Diego, California, licensed in California (PSY19917) and active in the NPI registry since August 2005. He has opted out of Medicare through July 1, 2028.

NPPES Registry Identity

NPI1730180852

Entity TypeIndividualMale

Primary Taxonomy103TP2701X

Provider Legal NameDR. GREGORY ERNEST KOCHCredential: PSY.D.

Location Address4081 STEPHENS STSan Diego, CA 92103-1242

Mailing Address4081 Stephens StSan Diego, CA 92103-1242 · (888) 588-7836 · Fax (888) 588-7836

Phone(888) 588-7836

Fax(888) 588-7836

Sole ProprietorYes

Enumeration DateAugust 10, 2005

Last NPPES UpdateSeptember 11, 2025

✔ NPI 1730180852 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 5

★ Primary SpecialtyPsychologist · Group PsychotherapyBehavioral Health & Social Service Providers

Taxonomy Code103TP2701X

License✔ Licensed in CA · PSY19917

Definition

A psychologist who specializes in group psychology and group psychotherapy that is an evidenced-based specialty that prepares group leaders to identify and capitalize on developmental and healing possibilities embedded in the interpersonal/intrapersonal functioning of individual group members as well as collectively for the group. Emphasis is placed on the use of group dynamics to assist and treat individual group members. The specialty is applicable to all age groups, children, adolescents, adults and older adults, for a wide variety of conditions and concerns, and in numerous and diverse settings.

Also ListedPsychologistTaxonomy 103T00000X · License PSY19917 (CA)

Also ListedPsychologist · Cognitive & BehavioralTaxonomy 103TB0200X · License PSY19917 (CA)

Also ListedPsychologist · ClinicalTaxonomy 103TC0700X · License PSY19917 (CA)

Also ListedPsychologist · Clinical Child & AdolescentTaxonomy 103TC2200X · License PSY19917 (CA)

Other Identifiers 4

Other0PL199170CA · Blue Shield

Other11397904CA · Caqh

MedicaidPSY199170CA

Other5551998CA · Firsthealth/ccn

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. Gregory Ernest Koch 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 July 1, 2022 through July 1, 2028.

Opt-Out Effective DateJuly 1, 2022

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

Other Providers at the Same Location NPPES 2

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

DR. NINA PATRICIA AKIN P.H.D

Psychologist (Clinical)

4081 STEPHENS ST
SAN DIEGO, CA 92103

San Diego County (619) 757-4498

DR. ALICIA GILBERT PHD

Psychologist

4081 STEPHENS ST
SAN DIEGO, CA 92103

San Diego County (858) 401-2142

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 Gregory Koch's NPI number?

The NPI number for Gregory Koch is 1730180852. It was assigned to this individual provider in the NPPES registry on August 10, 2005.

Where is Gregory Koch located?

Gregory Koch practices at 4081 Stephens St, San Diego, CA 92103. The listed phone number is (888) 588-7836.

What is Gregory Koch's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Group Psychotherapy, with taxonomy code 103TP2701X.

Is Gregory Koch enrolled in Medicare?

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

When was this NPI record last updated?

The NPPES record for Gregory Koch was last updated on September 11, 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.