Gregory Ernest Koch, PSY.D.

Primary specialty

Group Psychotherapy PsychologistTaxonomy code 103TP2701X

License

PSY19917 Issued in CA

Practice address

4081 Stephens St
San Diego, CA 92103-1242

Phone

(888) 588-7836

Fax

(888) 588-7836

NPI assigned

Aug 10, 2005

Sex

Male

Sole proprietor

Yes

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 5

Addresses

Other identifiers 4

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Opted out of Medicare

Yes, effective Jul 1, 2022 through Jul 1, 2028

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Rochelle Perper, Psychology PC

  • Clinical Psychologist
  • San Diego, CA
  • NPI 1447696836
  NPD (past)

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1123632000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1730180852",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4081 STEPHENS ST",
            "city": "SAN DIEGO",
            "state": "CA",
            "postal_code": "921031242",
            "telephone_number": "888-588-7836",
            "fax_number": "888-588-7836"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4081 STEPHENS ST",
            "city": "SAN DIEGO",
            "state": "CA",
            "postal_code": "921031242",
            "telephone_number": "888-588-7836",
            "fax_number": "888-588-7836"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KOCH",
        "first_name": "GREGORY",
        "middle_name": "ERNEST",
        "name_prefix": "Dr.",
        "credential": "PSY.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2005-08-10",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103TB0200X",
            "taxonomy_group": "",
            "desc": "Psychologist, Cognitive & Behavioral",
            "state": "CA",
            "license": "PSY19917",
            "primary": false
        },
        {
            "code": "103TC0700X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical",
            "state": "CA",
            "license": "PSY19917",
            "primary": false
        },
        {
            "code": "103TC2200X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical Child & Adolescent",
            "state": "CA",
            "license": "PSY19917",
            "primary": false
        },
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": "CA",
            "license": "PSY19917",
            "primary": false
        },
        {
            "code": "103TP2701X",
            "taxonomy_group": "",
            "desc": "Psychologist, Group Psychotherapy",
            "state": "CA",
            "license": "PSY19917",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE SHIELD",
            "identifier": "0PL199170",
            "state": "CA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CAQH",
            "identifier": "11397904",
            "state": "CA"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "PSY199170",
            "state": "CA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "FIRSTHEALTH/CCN",
            "identifier": "5551998",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Lexie Kobey, NONE
• April Jean Kobishop Knutson, RN
• Helen Sandra Kobold, LMFT
• Chloe Jade Kobus
• David Koch, BCBA
• Heather Koch, MA, CCC-SLP
• Katelynn Koch
• Kenneth G. Koch, DC
• Lynne Vocke Koch, OTR
• Matthew Hunt Koch, MFT

• Group Psychotherapy Psychologist in San Diego, CA
• Providers in San Diego, CA by specialty
• Group Psychotherapy Psychologist in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Opt Out Affidavits.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.