Individual provider Active NPI

John C Bolf, PHD

  • Marriage & Family Therapist
  • Roseville, CA
National Provider Identifier
1558489138
Registry record updated Sep 11, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Marriage & Family TherapistTaxonomy code 106H00000X
License
MFT13752 Issued in CA
Practice address
101 Cirby Hills Dr
Roseville, CA 95678-4360
Phone
(916) 787-8814
Fax
(916) 787-8967
NPI assigned
Mar 26, 2007
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Sep 11, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Clinical Psychologist 103TC0700X PSY6653 CA
Marriage & Family Therapist 106H00000X MFT13752 CA Primary

Addresses

Primary practice location

101 Cirby Hills Dr
Roseville, CA 95678-4360

Mailing address

10556 Combie Rd
P. O. Box 106525
Auburn, CA 95602-8908
Phone (916) 787-8814

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled
Credentials
Doctor of Philosophy

State licenses

LicenseStateTypeSpecialty
PSY6653CAMDClinical Psychologist
MFT13752CAMDMarriage & Family Therapist

NPI Registry JSON

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

{
    "created_epoch": "1174867200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1558489138",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "10556 COMBIE RD",
            "address_2": "P. O. BOX 106525",
            "city": "AUBURN",
            "state": "CA",
            "postal_code": "956028908",
            "telephone_number": "916-787-8814",
            "fax_number": "916-787-8967"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "101 CIRBY HILLS DR",
            "city": "ROSEVILLE",
            "state": "CA",
            "postal_code": "956784360",
            "telephone_number": "916-787-8814",
            "fax_number": "916-787-8967"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BOLF",
        "first_name": "JOHN",
        "middle_name": "C",
        "name_prefix": "Dr.",
        "credential": "PHD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2007-03-26",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103TC0700X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical",
            "state": "CA",
            "license": "PSY6653",
            "primary": false
        },
        {
            "code": "106H00000X",
            "taxonomy_group": "",
            "desc": "Marriage & Family Therapist",
            "state": "CA",
            "license": "MFT13752",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Roseville, CA

Sources for this page

  • 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.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.