Gianna Nicole Niemeier Vermeys, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

R81706 Issued in AZ

Practice address

5777 E Mayo Blvd
Phoenix, AZ 85054-4502

Phone

(480) 342-2000

NPI assigned

Apr 22, 2025

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

Other names 1

• Gianna Niemeier Former name

Medicare fee-for-service enrollment

Enrolled in AZ

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

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

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

{
    "created_epoch": "1745280000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1785715200000",
    "number": "1235926411",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 860912",
            "city": "MINNEAPOLIS",
            "state": "MN",
            "postal_code": "554860912"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5777 E MAYO BLVD",
            "city": "PHOENIX",
            "state": "AZ",
            "postal_code": "850544502",
            "telephone_number": "480-342-2000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "VERMEYS",
        "first_name": "GIANNA",
        "middle_name": "NICOLE NIEMEIER",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2025-04-22",
        "last_updated": "2026-08-03",
        "certification_date": "2026-08-03",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "AZ",
            "license": "R81706",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "GIANNA",
            "last_name": "NIEMEIER",
            "credential": "MD",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Veritas Counseling Center, LLC
• Brielle Verlander
• Lora Verley, LAMFT
• Anushka Narendrasingh Verma
• Marianne N. Verma, MD
• Steven Vermeys, MD
• Stephanie Vermillion, PA-C, ATC
• Deborah M Vernasco, M.D.
• Constance Verno, RN
• Kari Vernon, DC

• Internal Medicine Physician in Phoenix, AZ
• Providers in Phoenix, AZ by specialty
• Internal Medicine Physician in Arizona

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 3, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.