Ahmad Osama Rez, M.D

Primary specialty

Hospitalist PhysicianTaxonomy code 208M00000X

License

036.131216 Issued in IL

Practice address

1 Saint Anthonys Way
Alton, IL 62002-4568

Phone

(314) 317-0600

Fax

(314) 317-0606

NPI assigned

Sep 16, 2007

Sex

Male

Sole proprietor

No

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

Specialties & licenses 4

Addresses

Medicare fee-for-service enrollment

Enrolled in MO, IL, CA3 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 3

Specialty

Internal MedicineAlso: Hospitalist

Education

Other, 2003

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Galen Inpatient Physicians PCGroup PAC ID 3678464633, shared by 11 NPIs, 1,045 clinicians

Physician Groups LCGroup PAC ID 3072421254, 526 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• SSM Health at Home Hospice Hospice, Wentzville, MO, CCN 261515
• SSM St Clare Health Center Hospital, Fenton, MO, CCN 260081
• Missouri Baptist Medical Center Hospital, Saint Louis, MO, CCN 260108

Merit-based Incentive Payment System (MIPS)

Final score

82.4 of 100Reported as group

Quality

65.6

Improvement activities

40

Cost

71.06

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.

• Physician Groups LC

  • Multi-Specialty Clinic/Center
  • Saint Louis, MO
  • NPI 1285664268

  Internal Medicine

  Medicare reassignment Care Compare group NPD
• Galen Inpatient Physicians PC.

  • Hospitalist Physician
  • Fenton, MO
  • NPI 1538714688

  Internal Medicine

  Medicare reassignment NPD
• Galen Inpatient Physicians, PC

  • Hospitalist Physician
  • Manteca, CA
  • NPI 1689320459
  Medicare reassignment NPD
• Cep America-Illinois Hospitalists, LLP

  • Internal Medicine Physician
  • Belleville, IL
  • NPI 1841613403
  Medicare reassignment
• Fairview Heights Medical Group SC

  • Multi-Specialty Clinic/Center
  • Saint Louis, MO
  • NPI 1679503668

  IL

  Medicare reassignment
• Cep America-Illinois Hospitalists, LLP

  • Internal Medicine Physician
  • Springfield, IL
  • NPI 1598532061
  NPD
• Galen Inpatient Physicians PC

  • Hospitalist Physician
  • Los Angeles, CA
  • NPI 1205787686
  NPD
• Galen Inpatient Physicians PC

  • Internal Medicine Physician
  • Victorville, CA
  • NPI 1225672967
  NPD
• Physician Groups LC

  • Multi-Specialty Clinic/Center
  • Farmington, MO
  • NPI 1427114990
  NPD
• Jefferson Physician Network, LLC

  • Vascular Surgery Physician
  • Festus, MO
  • NPI 1558508606
  NPD (past)
• Sreenu Ada,MD,PC

  • Internal Medicine Physician
  • Saint Louis, MO
  • NPI 1003990821
  NPD (past)
• SSM Health Care St. Louis

  • General Acute Care Hospital
  • Fenton, MO
  • NPI 1851496152
  NPD (past)

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

• SSM Health Businesses

  • Community Based Hospice Care Agency
  • Wentzville, MO
  • NPI 1285609966
  Care Compare affiliation Name & address match
• Missouri Baptist Medical Center

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1487663506
  Care Compare affiliation
• SSM Health Care St. Louis

  • General Acute Care Hospital
  • Fenton, MO
  • NPI 1851496152
  Care Compare affiliation

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

{
    "created_epoch": "1189900800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1758240000000",
    "number": "1356537179",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "12101 WOODCREST EXECUTIVE DR",
            "address_2": "SUITE 210",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631415047",
            "telephone_number": "314-317-0600",
            "fax_number": "314-317-0606"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1 SAINT ANTHONYS WAY",
            "city": "ALTON",
            "state": "IL",
            "postal_code": "620024568",
            "telephone_number": "314-317-0600",
            "fax_number": "314-317-0606"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "4500 Memorial Dr",
            "address_purpose": "LOCATION",
            "city": "Belleville",
            "state": "IL",
            "postal_code": "622265360",
            "country_code": "US",
            "telephone_number": "618-257-6220",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "REZ",
        "first_name": "AHMAD",
        "middle_name": "OSAMA",
        "credential": "M.D",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-09-16",
        "last_updated": "2025-09-19",
        "certification_date": "2025-09-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "MO",
            "license": "2010014085",
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "IL",
            "license": "036131216",
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "IL",
            "license": "036.131216",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "036.131216",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Residential Options, Inc.
• Residential Options, Inc.
• Luke William Revelt, DMD
• Ethan Emerson Reynolds, M.D.
• Rachel E Reynolds, PT
• Talyn Rhodes
• John Albert Richards Jr., M.D.
• Clint Ricker
• Brooke Lindsay Ridenbark, MSW,LSW
• David Robert Riedel, MD

• Hospitalist Physician in Alton, IL
• Providers in Alton, IL by specialty
• Hospitalist Physician in Illinois

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