Krista Nicole Grennan, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

ME170196 Issued in FL

Practice address

4500 San Pablo Rd S
Jacksonville, FL 32224-1865

Phone

(904) 953-2000

NPI assigned

Mar 24, 2023

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in FL

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Internal Medicine

Education

Univ of Central Florida, College of Medicine, 2023

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Hospital & facility affiliations

• Mayo Clinic Hospital, Jacksonville, FL, CCN 100151

Medicare enrollment (NPD)

Enrolled

Interoperability endpoints

• Direct secure messaging: kgrennan1947992@ehrdirect.mayoclinicmsg.org

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Mayo Clinic Florida

  • General Acute Care Hospital
  • Jacksonville, FL
  • NPI 1891782470
  Care Compare affiliation

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

{
    "created_epoch": "1679616000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1781222400000",
    "number": "1093418428",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4500 SAN PABLO RD S",
            "city": "JACKSONVILLE",
            "state": "FL",
            "postal_code": "322241865"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4500 SAN PABLO RD S",
            "city": "JACKSONVILLE",
            "state": "FL",
            "postal_code": "322241865",
            "telephone_number": "904-953-2000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GRENNAN",
        "first_name": "KRISTA",
        "middle_name": "NICOLE",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2023-03-24",
        "last_updated": "2026-06-12",
        "certification_date": "2026-06-12",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "FL",
            "license": "ME170196",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "kgrennan1947992@ehrdirect.mayoclinicmsg.org",
            "affiliation": "N",
            "address_1": "4500 San Pablo Rd S",
            "city": "Jacksonville",
            "state": "FL",
            "country_code": "US",
            "postal_code": "322241865",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Daniel Greico
• Jack Leeland Greider Jr., M.D.
• Virginia Mary Greiner, ARNP
• Ami Grek, ARNP
• Ann Gefen Grenadier, PHD, LMHC
• Nicole Grennan
• Cody Gresham
• Mary Elizabeth Gresham, LCSW
• Kelsey Gress
• Sabrina Faith Gretkierewicz, PHD

• Internal Medicine Physician in Jacksonville, FL
• Providers in Jacksonville, FL by specialty
• Internal Medicine Physician in Florida

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 12, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.