Onyema Nnanna, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

2019023516 Issued in MO

Practice address

536 N Taylor Ave
Saint Louis, MO 63108-1888

Phone

(314) 449-1143

Fax

(314) 449-1724

NPI assigned

Jun 15, 2016

Last updated

Oct 9, 2026By the provider in NPPES

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

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in TX, MO, IL, OK4 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 4

Specialty

HospitalistAlso: Internal Medicine

Education

Other, 2009

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Missouri HB Medical Services LLCGroup PAC ID 2668813197, 77 clinicians

Meds Inpatient Services Associates, IncGroup PAC ID 1557865250, 14 clinicians

Midwest Inpatient Anderson Health IncGroup PAC ID 3072908474, 46 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Anderson Hospital Hospital, Maryville, IL, CCN 140289
• SSM Health St Mary's Hospital -Centralia Hospital, Centralia, IL, CCN 140034
• Poplar Bluff Regional Medical Center Hospital, Poplar Bluff, MO, CCN 260119
• SSM Health Saint Louis University Hospital Hospital, Saint Louis, MO, CCN 260105
• Barnes Jewish Hospital Hospital, Saint Louis, MO, CCN 260032

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations (25 of 26)

Interoperability endpoints

• Direct secure messaging: onnanna236885@direct-ehr-ssmhc.com

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

• Missouri HB Medical Services, LLC

  • Emergency Medicine Physician
  • Poplar Bluff, MO
  • NPI 1922868462

  Hospitalist

  Medicare reassignment Care Compare group NPD
• Meds Inpatient Services Associates, Inc

  • Hospitalist Physician
  • Centralia, IL
  • NPI 1154215895
  Medicare reassignment Care Compare group NPD
• Midwest Inpatient Anderson Health, Inc

  • Emergency Medicine Physician
  • Maryville, IL
  • NPI 1821758608
  Medicare reassignment Care Compare group NPD
• Cogent Healthcare of Missouri, Inc

  • Critical Care Medicine (Internal Medicine) Physician
  • Fenton, MO
  • NPI 1780961599
  Medicare reassignment NPD
• Cole Physician Services LLC

  • Hospitalist Physician
  • Jefferson City, MO
  • NPI 1144578659
  Medicare reassignment NPD
• Galen Inpatient Physicians PC.

  • Hospitalist Physician
  • Fenton, MO
  • NPI 1538714688

  Internal Medicine

  Medicare reassignment NPD
• Ies HSP Missouri LLC

  • Hospitalist Physician
  • West Plains, MO
  • NPI 1962102871
  Medicare reassignment NPD
• Sound Physicians of Illinois, LLC

  • Hospitalist Physician
  • Bridgeton, MO
  • NPI 1043598865

  Internal Medicine

  Medicare reassignment NPD
• Cogent Healthcare of Texas, PA

  • Internal Medicine Physician
  • Dallas, TX
  • NPI 1992722953
  Medicare reassignment NPD
• Genesis Health System

  dba Genesis Medical Center - Silvis

  • General Acute Care Hospital
  • Silvis, IL
  • NPI 1427132604
  Medicare reassignment NPD
• Hospitalist Medicine Physicians of Texas, PLLC

  • Internal Medicine Physician
  • Humble, TX
  • NPI 1629307095
  Medicare reassignment NPD
• Midwest Emergency Sparta, Inc

  • Emergency Medicine Physician
  • Sparta, IL
  • NPI 1194162370
  Medicare reassignment NPD

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

• Barnes Jewish Hospital

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1649299827
  Care Compare affiliation
• Poplar Bluff Regional Medical Center LLC

  dba Poplar Bluff Regional Medical Center

  • General Acute Care Hospital
  • Poplar Bluff, MO
  • NPI 1700831724
  Care Compare affiliation
• SSM-Sluh Inc

  dba SSM Health Saint Louis University Hospital

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1942685920
  Care Compare affiliation
• Anderson Hospital

  • General Acute Care Hospital
  • Maryville, IL
  • NPI 1053481630
  Care Compare affiliation
• St Mary's Hospital, Centralia, Illinois

  dba SSM Health St. Mary's Hospital - Centralia

  • General Acute Care Hospital
  • Centralia, IL
  • NPI 1083617245
  Care Compare affiliation

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

{
    "created_epoch": "1465948800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1791504000000",
    "number": "1164872768",
    "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": {
        "last_name": "NNANNA",
        "first_name": "ONYEMA",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2016-06-15",
        "last_updated": "2026-10-09",
        "certification_date": "2026-10-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MO",
            "license": "2019023516",
            "primary": true
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "MO",
            "license": "2019023516",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicproxy.et0965.epichosted.com/FHIRProxy/api/FHIR/DSTU2/",
            "affiliation": "N",
            "endpointDescription": "BJC",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "contentType": "CSV",
            "contentTypeDescription": "CSV",
            "address_1": "1101 W Liberty St",
            "city": "Farmington",
            "state": "MO",
            "country_code": "US",
            "postal_code": "636401921",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Stephanie Njemanze, MD
• Norman Chege Njihi, FNP
• Dolores Benedicta Njoku, MD
• Lubika Jeremie Nkashama, MD
• NLJ Counseling and Coaching Services, LLC
• Noah Henderson PHD MFT (United Chrisrtian Counseling Center LLC)
• Ryan Matthew Noble, M.D.
• Willie A Nobles, LCSW
• Nicholas Noblitt, PT, DPT, LAT, ATC
• Michele A Nobs, N.P.

• 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 Oct 9, 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.