John T Callahan, R.PH.

Primary specialty

PharmacistTaxonomy code 183500000X

License

2589 Issued in WY

Practice address

1 Jefferson Barracks Dr
Saint Louis, MO 63125-4181

Phone

(314) 894-6570

Fax

(314) 845-5091

NPI assigned

Mar 23, 2013

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Registered Pharmacist

State licenses

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

{
    "created_epoch": "1363996800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1777593600000",
    "number": "1497097885",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "901 WASHINGTON AVE UNIT 504",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631011259",
            "telephone_number": "719-510-8155",
            "fax_number": "314-845-5091"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1 JEFFERSON BARRACKS DR",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631254181",
            "telephone_number": "314-894-6570",
            "fax_number": "314-845-5091"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "915 N Grand Blvd",
            "address_purpose": "LOCATION",
            "city": "Saint Louis",
            "state": "MO",
            "postal_code": "631061621",
            "country_code": "US",
            "telephone_number": "314-224-2793",
            "fax_number": "314-845-5091",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "CALLAHAN",
        "first_name": "JOHN",
        "middle_name": "T",
        "name_prefix": "Mr.",
        "credential": "R.PH.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2013-03-23",
        "last_updated": "2026-05-01",
        "certification_date": "2026-05-01",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "183500000X",
            "taxonomy_group": "",
            "desc": "Pharmacist",
            "state": "IL",
            "license": "051303891",
            "primary": false
        },
        {
            "code": "183500000X",
            "taxonomy_group": "",
            "desc": "Pharmacist",
            "state": "WY",
            "license": "2589",
            "primary": true
        },
        {
            "code": "183500000X",
            "taxonomy_group": "",
            "desc": "Pharmacist",
            "state": "CO",
            "license": "10452",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• William B Call, PHARM.D.
• Carl Keith Callahan, CNP
• Christopher Patrick Callahan, MD
• Connor Callahan, MD
• David J Callahan, MD
• Vicki Coopmans Callan, CRNA
• Paige Callans
• Nina Gene Callaway, M.D.
• Alison Katherine Callegari, MD
• Isaac Callen, CRNA

• Pharmacist in Saint Louis, MO
• Providers in Saint Louis, MO by specialty
• Pharmacist in Missouri

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 1, 2026; 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.