John Francis Brennan, MD

Primary specialty

Molecular Genetic Pathology (Pathology) PhysicianTaxonomy code 207ZP0007X

License

98066 Issued in SC

Practice address

171 Ashley Ave
Charleston, SC 29425-0100

Phone

(843) 792-1414

NPI assigned

May 3, 2021

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Electronic endpoints 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Interoperability endpoints

• Direct secure messaging: jbrennan726398@direct.unc.nchie.net

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

{
    "created_epoch": "1620000000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1788912000000",
    "number": "1891378345",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 751461",
            "city": "CHARLOTTE",
            "state": "NC",
            "postal_code": "282751461",
            "telephone_number": "843-792-1414"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "171 ASHLEY AVE",
            "city": "CHARLESTON",
            "state": "SC",
            "postal_code": "294250100",
            "telephone_number": "843-792-1414"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "15 N Medical Dr",
            "address_purpose": "LOCATION",
            "city": "Salt Lake City",
            "state": "UT",
            "postal_code": "841121100",
            "country_code": "US",
            "telephone_number": "801-581-2121",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "321 S Columbia St",
            "address_purpose": "LOCATION",
            "city": "Chapel Hill",
            "state": "NC",
            "postal_code": "275144309",
            "country_code": "US",
            "telephone_number": "919-966-4676",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "BRENNAN",
        "first_name": "JOHN",
        "middle_name": "FRANCIS",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2021-05-03",
        "last_updated": "2026-09-09",
        "certification_date": "2026-09-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207ZP0007X",
            "taxonomy_group": "",
            "desc": "Pathology, Molecular Genetic Pathology",
            "state": "SC",
            "license": "98066",
            "primary": true
        },
        {
            "code": "207ZP0007X",
            "taxonomy_group": "",
            "desc": "Pathology, Molecular Genetic Pathology",
            "state": "UT",
            "license": "14211788-1205",
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": "NC",
            "license": "304865",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "direct@direct.musc.edu",
            "affiliation": "N",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "address_1": "171 Ashley Ave",
            "city": "Charleston",
            "state": "SC",
            "country_code": "US",
            "postal_code": "294250100",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Caitlin Elizabeth Breidenbruch
• Alexa Breitling
• Anissa Lorraine Bremer
• William Brener, MD
• Ana Gabrielle Brennan, MD
• Julia Schroeder Brennan
• Abigail Brenner
• Joel Andrew Brenny, MD
• Thomas Brenzel, MD
• Frank J Brescia, MD

• Molecular Genetic Pathology (Pathology) Physician in Charleston, SC
• Providers in Charleston, SC by specialty
• Molecular Genetic Pathology (Pathology) Physician in South Carolina

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 9, 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.