Alaina Zytniak, AU.D.

Primary specialty

AudiologistTaxonomy code 231H00000X

License

2016018798 Issued in MO

Practice address

615 S New Ballas Rd Ste G211.4
Saint Louis, MO 63141-8221

Phone

(314) 251-3830

Fax

(314) 251-5992

NPI assigned

May 31, 2016

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

• Alaina Lenzen Former name

Medicare fee-for-service enrollment

Enrolled in MO

Enrollment records 1

Specialty

Qualified Audiologist

Education

Other, 2016

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Mercy Hospital SouthGroup PAC ID 8426962556, 45 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Practice roles

Locations

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.

• Mercy Hospital South

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1568481984
  Medicare reassignment Care Compare group NPD
• Mercy Hospitals East Communities

  • General Acute Care Hospital
  • Washington, MO
  • NPI 1285664177
  Medicare reassignment NPD
• Mercy Hospitals East Communities

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1427098169
  Medicare reassignment NPD
• Mercy Hospital South

  • Medicare Defined Swing Bed Hospital Unit
  • Saint Louis, MO
  • NPI 1033714209
  NPD
• Mercy Hospitals East Communities

  • Rural Health Clinic/Center
  • Washington, MO
  • NPI 1104912997
  NPD
• Mercy Hospitals East Communities

  • Audiologist
  • Saint Louis, MO
  • NPI 1255790762
  NPD
• Mercy Hospitals East Communities

  • Land Ambulance
  • Saint Louis, MO
  • NPI 1881329902
  NPD

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

{
    "created_epoch": "1464652800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1775088000000",
    "number": "1629426606",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "615 S NEW BALLAS RD STE G211.4",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631418221",
            "telephone_number": "314-251-3830",
            "fax_number": "314-251-5992"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "615 S NEW BALLAS RD STE G211.4",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631418221",
            "telephone_number": "314-251-3830",
            "fax_number": "314-251-5992"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ZYTNIAK",
        "first_name": "ALAINA",
        "credential": "AU.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2016-05-31",
        "last_updated": "2026-04-02",
        "certification_date": "2026-04-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "231H00000X",
            "taxonomy_group": "",
            "desc": "Audiologist",
            "state": "MO",
            "license": "2016018798",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "ALAINA",
            "last_name": "LENZEN",
            "credential": "AU.D.",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• William Douglas Zweig, M.D.
• Shanna Marie Zwick, PA
• Daniel Michael Zwilling, PA
• Kayla Elizabeth Zydeck, MD
• Kristen A Zysk, RNC, WHNP

• Audiologist in Saint Louis, MO
• Providers in Saint Louis, MO by specialty
• Audiologist in Missouri

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 2, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• 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.