303 Emergency Physicians PLLC

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

Legal business name

303 EMERGENCY PHYSICIANS PLLC

Practice address

25550 N Lake Pleasant Pkwy
Peoria, AZ 85383-1364

Phone

(954) 939-5000

Fax

(877) 250-6889

NPI assigned

Nov 3, 2025

Last updated

Nov 3, 2025By the provider in NPPES

Organization subpart

No

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

Authorized official

Name

Mark Jeffrey Slepin, MD

Title

Owner

Phone

(727) 692-1518

Specialties & licenses 1

Addresses

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

{
    "created_epoch": "1762128000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1762128000000",
    "number": "1275402828",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 98802",
            "city": "LAS VEGAS",
            "state": "NV",
            "postal_code": "891938802",
            "telephone_number": "954-939-5000",
            "fax_number": "877-250-6889"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "25550 N LAKE PLEASANT PKWY",
            "city": "PEORIA",
            "state": "AZ",
            "postal_code": "853831364",
            "telephone_number": "954-939-5000",
            "fax_number": "877-250-6889"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "303 EMERGENCY PHYSICIANS PLLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2025-11-03",
        "last_updated": "2025-11-03",
        "certification_date": "2025-11-03",
        "status": "A",
        "authorized_official_last_name": "SLEPIN",
        "authorized_official_first_name": "MARK",
        "authorized_official_middle_name": "JEFFREY",
        "authorized_official_title_or_position": "OWNER",
        "authorized_official_telephone_number": "727-692-1518",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 3, 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.