Ryan Johnson, DMD

Primary specialty

PeriodonticsTaxonomy code 1223P0300X

License

021.003528 Issued in IL

Practice address

120 Oakbrook Ctr Ste 714
Oak Brook, IL 60523-1831

Phone

(630) 654-3331

Fax

(630) 954-2910

NPI assigned

Aug 9, 2021

Sex

Male

Sole proprietor

Yes

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

Practice roles

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Oakbrook Endodontic Associates, LTD.

  • Endodontics
  • Oak Brook, IL
  • NPI 1104972694
  NPD (past)

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

{
    "created_epoch": "1628467200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783641600000",
    "number": "1447924808",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "958 KENSINGTON DR",
            "city": "NORTHBROOK",
            "state": "IL",
            "postal_code": "600625975",
            "telephone_number": "941-914-5056"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "120 OAKBROOK CTR STE 714",
            "city": "OAK BROOK",
            "state": "IL",
            "postal_code": "605231831",
            "telephone_number": "630-654-3331",
            "fax_number": "630-954-2910"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "23909 W Renwick Rd Ste 103",
            "address_purpose": "LOCATION",
            "city": "Plainfield",
            "state": "IL",
            "postal_code": "605442109",
            "country_code": "US",
            "telephone_number": "815-609-3636",
            "fax_number": "815-609-3399",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1641 N Milwaukee Ave Ste 3",
            "address_purpose": "LOCATION",
            "city": "Libertyville",
            "state": "IL",
            "postal_code": "600481386",
            "country_code": "US",
            "telephone_number": "847-349-4306",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "720 Brom Ct Ste 102",
            "address_purpose": "LOCATION",
            "city": "Naperville",
            "state": "IL",
            "postal_code": "605406533",
            "country_code": "US",
            "telephone_number": "630-717-6717",
            "fax_number": "630-717-7790",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "JOHNSON",
        "first_name": "RYAN",
        "credential": "DMD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2021-08-09",
        "last_updated": "2026-07-10",
        "certification_date": "2026-07-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1223P0300X",
            "taxonomy_group": "",
            "desc": "Dentist, Periodontics",
            "state": "IL",
            "license": "021.003528",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Chris Lynne Johnson, PSYD
• Emily Johnson, AUD
• Jimine Windy Johnson, LCPC
• Marie Elizabeth Johnson, PSY.D.
• Patricia Ann Johnson, OTR/L, PT
• Shakita Johnson, PMHNP
• Alaynna Jones, RBT
• Camiria Jones, PHD
• Geoffrey Leroy Jones, M.D.
• Jacqueline Jones

• Periodontics in Oak Brook, IL
• Providers in Oak Brook, IL by specialty
• Periodontics in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 10, 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.