John M Walkonis, DDS

Primary specialty

DentistTaxonomy code 122300000X

License

012877 Issued in MO

Practice address

300 1St Capitol Dr
Saint Charles, MO 63301-2844

Phone

(636) 947-5000

Fax

(636) 947-5090

NPI assigned

May 31, 2006

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

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

State licenses

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

{
    "created_epoch": "1149033600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1194762138",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1836 LACKLAND HILL PKWY",
            "address_2": "ATTN: CREDENTIALING",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631463572",
            "telephone_number": "314-989-0300",
            "fax_number": "314-810-1399"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 1ST CAPITOL DR",
            "city": "SAINT CHARLES",
            "state": "MO",
            "postal_code": "633012844",
            "telephone_number": "636-947-5000",
            "fax_number": "636-947-5090"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WALKONIS",
        "first_name": "JOHN",
        "middle_name": "M",
        "credential": "DDS",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-31",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "122300000X",
            "taxonomy_group": "",
            "desc": "Dentist",
            "state": "MO",
            "license": "012877",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Karen Kaye Walker, PLPC
• Katelyn Walker
• Mary L. Walker, PLPC
• Tricia Walker
• William V Walker, MD
• Aimee Rose Wallace, MA, LPC
• David Stuart Wallace, D.C.
• Mary Wallace, OTR
• Joseph G Waller, M.D., M.P.H.
• James Walsh

• Dentist in Saint Charles, MO
• Providers in Saint Charles, MO by specialty
• Dentist in Missouri

• 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.