Dianna Walker, NP

Primary specialty

Nurse PractitionerTaxonomy code 363L00000X

License

2014005735 Issued in MO

Practice address

3555 Sunset Office Dr Ste 107
Saint Louis, MO 63127-1045

Phone

(314) 543-5200

Fax

(314) 543-5219

NPI assigned

Mar 20, 2014

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

• Dianna J Gaffner Former name

Medicare fee-for-service enrollment

Enrolled in MO

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Nurse Practitioner

Education

Other, 2013

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

American Multispecialty Group IncGroup PAC ID 1658365572, 118 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Mercy Hospital South Hospital, Saint Louis, MO, CCN 260077

Medicare enrollment (NPD)

Enrolled

Credentials

Master of Science - Nursing, Nurse Practitioner

State licenses

Interoperability endpoints

• Direct secure messaging: dianna.walker.p1@direct.essehealth.nextgenshare.com

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.

• American Multispecialty Group Inc.

  • Internal Medicine Physician
  • Saint Louis, MO
  • NPI 1972559532
  Medicare reassignment Care Compare group

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Mercy Hospital South

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1568481984
  Care Compare affiliation

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

{
    "created_epoch": "1395273600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1748476800000",
    "number": "1073930780",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 419052",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631419052",
            "telephone_number": "314-543-5200",
            "fax_number": "314-543-5219"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3555 SUNSET OFFICE DR STE 107",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631271045",
            "telephone_number": "314-543-5200",
            "fax_number": "314-543-5219"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WALKER",
        "first_name": "DIANNA",
        "credential": "NP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2014-03-20",
        "last_updated": "2025-05-29",
        "certification_date": "2025-05-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "MO",
            "license": "2014005735",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "DIANNA",
            "last_name": "GAFFNER",
            "middle_name": "J",
            "credential": "NP",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Bessia Mae Walker
• Candice Walker
• Carla W Walker, OT
• Chanita Walker
• Christa Elizabeth Walker, LPC
• Erin Walker, LPC, M.ED
• Fabianne L. Walker, MD
• Hannah Kathleen Walker, PT, DPT
• Jasmine R Walker, LMSW
• Javierra Walker

• Nurse Practitioner in Saint Louis, MO
• Providers in Saint Louis, MO by specialty
• Nurse Practitioner in Missouri

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 29, 2025; 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.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.