Zachary Joel Treat, MD

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

2020035229 Issued in MO

Practice address

10010 Kennerly Rd
Saint Louis, MO 63128-2106

Phone

(314) 525-1328

NPI assigned

Jun 8, 2018

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in MO, IA2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 2

Specialty

Family Practice

Education

University of Missouri, Columbia School of Medicine, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

St Anthonys Physician Organization Hospitalist Services LCGroup PAC ID 5092980656, 140 clinicians

Iowa Physicians Clinic Medical FoundationGroup PAC ID 8729992318, 1,254 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Mercy Hospital South Hospital, Saint Louis, MO, CCN 260077
• Allen Hospital Hospital, Waterloo, IA, CCN 160110

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

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.

• St Anthonys Physician Organization Hospitalist Services, L.C.

  dba Mercy Clinic South Hospitalists

  • Hospitalist Physician
  • Saint Louis, MO
  • NPI 1407216336
  Medicare reassignment Care Compare group NPD
• Iowa Physicians Clinic Medical Foundation

  dba UnityPoint Clinic

  • General Practice Physician
  • West Des Moines, IA
  • NPI 1366425274

  Family Medicine

  Medicare reassignment Care Compare group NPD
• Mercy Clinic Adult Hospitalists - St. Louis, LLC

  • Internal Medicine Physician
  • Saint Louis, MO
  • NPI 1841235108
  Medicare reassignment NPD
• Mercy Clinic Adult Hospitalists - Washington, LLC

  • Hospitalist Physician
  • Washington, MO
  • NPI 1891943429
  Medicare reassignment NPD
• Mercy Clinic Adult Hospitalists- Jefferson, LLC

  • Internal Medicine Physician
  • Festus, MO
  • NPI 1083052492
  Medicare reassignment NPD
• Mercy Hospitals East Communities

  dba Mercy JFK Clinic

  • Clinic/Center
  • Saint Louis, MO
  • NPI 1851431738
  Medicare reassignment NPD
• Unitypoint Health - Marshalltown

  • Emergency Medicine Physician
  • Marshalltown, IA
  • NPI 1164957593
  Medicare reassignment NPD
• Cornerstone Family Medicine LLC

  • Clinic/Center
  • Mexico, MO
  • NPI 1164164711
  NPD Authorized official
• Allen Memorial Hospital Corporation

  dba Allen Hospital

  • Women's Health Nurse Practitioner
  • Waterloo, IA
  • NPI 1891772927
  Medicare reassignment
• Mercy Hospitals East Communities

  dba Mercy St. Louis Transport Ambulance

  • Land Ambulance
  • Saint Louis, MO
  • NPI 1881329902
  NPD
• Allen Memorial Hospital Corporation

  dba Allen Hospital

  • Emergency Medicine Physician
  • Waterloo, IA
  • NPI 1346292521
  NPD
• Unitypoint Health - Marshalltown

  dba Unitypoint Clinic - Family Medicine - Rohlf Memorial

  • Rural Health Clinic/Center
  • Waverly, IA
  • NPI 1124655006
  NPD

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
• Allen Memorial Hospital Corporation

  dba Allen Hospital

  • General Acute Care Hospital
  • Waterloo, IA
  • NPI 1336231091
  Care Compare affiliation

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

{
    "created_epoch": "1528416000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1768780800000",
    "number": "1447743083",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "10010 KENNERLY RD",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631282106",
            "telephone_number": "314-525-1328"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "10010 KENNERLY RD",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631282106",
            "telephone_number": "314-525-1328"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "615 S New Ballas Rd",
            "address_purpose": "LOCATION",
            "city": "Saint Louis",
            "state": "MO",
            "postal_code": "631418221",
            "country_code": "US",
            "telephone_number": "314-251-6339",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "901 E 5th St",
            "address_purpose": "LOCATION",
            "city": "Washington",
            "state": "MO",
            "postal_code": "630903127",
            "country_code": "US",
            "telephone_number": "636-239-8231",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1400 US Highway 61",
            "address_purpose": "LOCATION",
            "city": "Festus",
            "state": "MO",
            "postal_code": "630284100",
            "country_code": "US",
            "telephone_number": "636-933-5337",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "TREAT",
        "first_name": "ZACHARY",
        "middle_name": "JOEL",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2018-06-08",
        "last_updated": "2026-01-19",
        "certification_date": "2026-01-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "IA",
            "license": "50495",
            "primary": false
        },
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "MO",
            "license": "2020035229",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Treasures Care Home Health Services
• Treasures of Heart in Home Services, LLC
• Treat Mental Health Missouri LLC
• Alexander Treat
• Rebecca Treat, PHARMD
• Diane Rene Trebing, PHARM.D
• Trevor L Tredway, MD, PHD
• Keeley Suzanne Treece, DDS
• Treetop Therapy Mo LLC
• Emily Lynn Trefts

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

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 19, 2026; 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.