NPIMap

Organization Active NPI

Timothy S. Johnston, M.D. PC

  • Family Medicine Physician
  • Merced, CA
National Provider Identifier
1407306665
Registry record updated Dec 9, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Family Medicine PhysicianTaxonomy code 207Q00000X
License
G58698 Issued in CA
Legal business name
TIMOTHY S. JOHNSTON, M.D. PC
Practice address
3349 G St
Suite F
Merced, CA 95340-0993
Phone
(209) 349-8549
Fax
(209) 580-4138
NPI assigned
Oct 11, 2016
Last updated
Dec 9, 2025By the provider in NPPES
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Dec 9, 2025

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

Authorized official

Name
Dr. Timothy Scott Johnston, M.D.NPI 1528097847
Title
Owner/Operator
Phone
(209) 756-2275

Authorized official NPPES reports the official by name only. The link goes to the one practitioner connected to this organization with that name.

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Family Medicine Physician 207Q00000X G58698 CA Primary

Addresses

Primary practice location

3349 G St
Suite F
Merced, CA 95340-0993

Mailing address

3349 G St Ste F
Merced, CA 95340-0978
Phone (209) 349-8549

Other practice location 1

3170 Collins Dr Ste B
Merced, CA 95348-3164
Phone (209) 349-8459

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CA

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20170503002455 CA Part B Supplier - Clinic/Group Practice 1456638238 Receives reassigned benefits from 19 practitioners
3 other NPIs on this enrollment
Practice locations: Merced, CA

Other NPIs on the same Medicare enrollment 3

NPIs listed together on one Medicare enrollment, typically parts of the same organization.

National Provider Directory

National Provider Directory
Tax ID family
Timothy S Johnston MD PC3 organizations share this tax ID, including this one

Other organizations with this tax ID 2

Organizations that report the same tax identification number in the National Provider Directory.

Locations

3170 Collins Dr
Ste A
Merced, CA 95348

Practitioners & affiliated clinicians

Practitioners 21

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.

View all 21

NPI Registry JSON

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

{
    "created_epoch": "1476144000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1765238400000",
    "number": "1407306665",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3349 G ST STE F",
            "city": "MERCED",
            "state": "CA",
            "postal_code": "953400978",
            "telephone_number": "209-349-8549",
            "fax_number": "209-580-4138"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3349 G ST",
            "address_2": "SUITE F",
            "city": "MERCED",
            "state": "CA",
            "postal_code": "953400993",
            "telephone_number": "209-349-8549",
            "fax_number": "209-580-4138"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "3170 Collins Dr Ste B",
            "address_purpose": "LOCATION",
            "city": "Merced",
            "state": "CA",
            "postal_code": "953483164",
            "country_code": "US",
            "telephone_number": "209-349-8459",
            "fax_number": "209-354-4607",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "organization_name": "TIMOTHY S. JOHNSTON, M.D. PC",
        "organizational_subpart": "NO",
        "enumeration_date": "2016-10-11",
        "last_updated": "2025-12-09",
        "certification_date": "2025-12-09",
        "status": "A",
        "authorized_official_last_name": "JOHNSTON",
        "authorized_official_first_name": "TIMOTHY",
        "authorized_official_middle_name": "SCOTT",
        "authorized_official_title_or_position": "OWNER/OPERATOR",
        "authorized_official_telephone_number": "209-756-2275",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "M.D."
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CA",
            "license": "G58698",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Merced, CA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 9, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.