John Glen Frownfelter, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

4301061866 Issued in MI

Practice address

16001 W 9 Mile Rd
Dept of Internal Medicine
Southfield, MI 48075-4818

Phone

(248) 849-3152

Fax

(248) 849-3230

NPI assigned

Jul 12, 2005

Last updated

Jul 13, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

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": "1121126400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1548268626",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "25925 TELEGRAPH RD",
            "address_2": "210",
            "city": "SOUTHFIELD",
            "state": "MI",
            "postal_code": "480342518",
            "telephone_number": "248-746-0342",
            "fax_number": "248-746-0308"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "16001 W 9 MILE RD",
            "address_2": "DEPT OF INTERNAL MEDICINE",
            "city": "SOUTHFIELD",
            "state": "MI",
            "postal_code": "480754818",
            "telephone_number": "248-849-3152",
            "fax_number": "248-849-3230"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "FROWNFELTER",
        "first_name": "JOHN",
        "middle_name": "GLEN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-07-12",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MI",
            "license": "4301061866",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CONTROLLED SUBSTANCE",
            "identifier": "4301061866",
            "state": "MI"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Kelli Fritz, DO
• Gavin Frody
• Front Line Counseling Services, PLLC
• Front Line Home Health Care Inc
• Danielle Nicole Frontiera, REGISTERED DIETITIAN
• Wasan Frownfelter, PA
• FS Complete Transportation Services, LLC
• April Dawn Fuentes, RN
• Andrea Fuller
• Emilee Fuller

• Internal Medicine Physician in Southfield, MI
• Providers in Southfield, MI by specialty
• Internal Medicine Physician in Michigan

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.