Sierra Occupational Services

Primary specialty

Occupational Medicine PhysicianTaxonomy code 2083X0100X

Legal business name

SIERRA OCCUPATIONAL SERVICES

Practice address

1429 W Fremont St
Stockton, CA 95203-2627

Phone

(209) 546-7767

Fax

(209) 546-7785

NPI assigned

Jan 22, 2007

Organization subpart

No

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

Authorized official

Name

Dr. James Leonard Sepiol, M.D.

Title

Preident

Phone

(209) 546-7767

Specialties & licenses 2

Addresses

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

{
    "created_epoch": "1169424000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1757548800000",
    "number": "1306990015",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1429 W FREMONT ST",
            "city": "STOCKTON",
            "state": "CA",
            "postal_code": "952032627",
            "telephone_number": "209-546-7767",
            "fax_number": "209-546-7785"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1429 W FREMONT ST",
            "city": "STOCKTON",
            "state": "CA",
            "postal_code": "952032627",
            "telephone_number": "209-546-7767",
            "fax_number": "209-546-7785"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "SIERRA OCCUPATIONAL SERVICES",
        "organizational_subpart": "NO",
        "enumeration_date": "2007-01-22",
        "last_updated": "2025-09-11",
        "status": "A",
        "authorized_official_last_name": "SEPIOL",
        "authorized_official_first_name": "JAMES",
        "authorized_official_middle_name": "LEONARD",
        "authorized_official_title_or_position": "PREIDENT",
        "authorized_official_telephone_number": "209-546-7767",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "M.D."
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "193400000X MULTIPLE SINGLE SPECIALTY GROUP",
            "desc": "Family Medicine",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "2083X0100X",
            "taxonomy_group": "193400000X MULTIPLE SINGLE SPECIALTY GROUP",
            "desc": "Preventive Medicine, Occupational Medicine",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Anne Michelle Sidlauskas
• Viseth Siem, PHARMD
• Jessica Elaine Sieminski, DO/MPH
• Ra Sieng
• Sierra Multisurgical Assoc
• Maria del Rosario Sierra Suarez
• Sierra Valley Lung & Sleep Medical Group Inc
• Sierra-Pacific Technology, Inc.
• Aryanna Elizabeth Sierra
• Diana Sierra

• Occupational Medicine Physician in Stockton, CA
• Providers in Stockton, CA by specialty
• Occupational Medicine Physician 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.