Hesperin Clinic

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

Legal business name

HESPERIN CLINIC

Practice address

536 N Taylor Ave
Saint Louis, MO 63108-1888

Phone

(314) 449-1143

Fax

(314) 449-1724

NPI assigned

Sep 29, 2026

Last updated

Sep 29, 2026By the provider in NPPES

Organization subpart

No

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

Authorized official

Name

Onyema Nnanna, MD

Title

Owner

Phone

(617) 982-8328

Specialties & licenses 3

Addresses

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

{
    "created_epoch": "1790640000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1790640000000",
    "number": "1396659413",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "536 N TAYLOR AVE",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631081888",
            "telephone_number": "314-449-1143",
            "fax_number": "314-449-1724"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "536 N TAYLOR AVE",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631081888",
            "telephone_number": "314-449-1143",
            "fax_number": "314-449-1724"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "HESPERIN CLINIC",
        "organizational_subpart": "NO",
        "enumeration_date": "2026-09-29",
        "last_updated": "2026-09-29",
        "certification_date": "2026-09-28",
        "status": "A",
        "authorized_official_last_name": "NNANNA",
        "authorized_official_first_name": "ONYEMA",
        "authorized_official_title_or_position": "OWNER",
        "authorized_official_telephone_number": "617-982-8328",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NU",
            "license": null,
            "primary": true
        },
        {
            "code": "207RG0300X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Geriatric Medicine",
            "state": "NU",
            "license": null,
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "NU",
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jacques A Herzog, MD
• Lindsey Heather Herzog, LCSW
• Marley Ann Herzog, ACSW, LCSW
• Mark Hesker, D.D.S.
• Cory M Heslin, MOST
• Agatha Hess, PT, DPT
• Annie Hess, MD
• Cayce Hess
• Chloe Hess
• Katherine C Hess, MS OT

• Internal Medicine Physician in Saint Louis, MO
• Providers in Saint Louis, MO by specialty
• Internal Medicine Physician in Missouri

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 29, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.

Verify at the official NPI Registry.