Margaret Besler Nagel, M.D.

Primary specialty

Pediatric Hematology & Oncology PhysicianTaxonomy code 2080P0207X

License

T9190 Issued in TX

Practice address

530 NE Glen Oak Ave
Peoria, IL 61637-0001

Phone

(309) 624-4945

NPI assigned

Apr 27, 2015

Last updated

Jan 16, 2026By the provider in NPPES

Sex

Female

Sole proprietor

No

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

Specialties & licenses 6

Addresses

Other names 1

• Margaret Frances Besler Former name

Medicare fee-for-service enrollment

Enrolled in IL

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 1

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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• The Board of Trustees of the University of Illinois

  • Anatomic Pathology Physician
  • Chicago, IL
  • NPI 1386863819
  Medicare reassignment NPD
• Board of Trustees of the University of Illinois

  dba Medical Service Plan at Peoria

  • Pediatrics Physician
  • Peoria, IL
  • NPI 1467425322
  NPD
• The Board of Trustees of the University of Illinois

  dba Occupational Health Service Institute (OHSI)

  • Occupational Medicine Physician
  • Chicago, IL
  • NPI 1043727571
  NPD

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

{
    "created_epoch": "1430092800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1768521600000",
    "number": "1841677051",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "530 NE GLEN OAK AVE",
            "city": "PEORIA",
            "state": "IL",
            "postal_code": "616370001",
            "telephone_number": "309-624-4945"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "530 NE GLEN OAK AVE",
            "city": "PEORIA",
            "state": "IL",
            "postal_code": "616370001",
            "telephone_number": "309-624-4945"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "NAGEL",
        "first_name": "MARGARET",
        "middle_name": "BESLER",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2015-04-27",
        "last_updated": "2026-01-16",
        "certification_date": "2026-01-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "TN",
            "license": "56144",
            "primary": false
        },
        {
            "code": "2080P0207X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Pediatric Hematology-Oncology",
            "state": "TX",
            "license": "T9190",
            "primary": true
        },
        {
            "code": "2080P0204X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Pediatric Emergency Medicine",
            "state": "TN",
            "license": "56144",
            "primary": false
        },
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "TN",
            "license": "56144",
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "2080P0207X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Pediatric Hematology-Oncology",
            "state": "IL",
            "license": "036168262",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "MARGARET",
            "last_name": "BESLER",
            "middle_name": "FRANCES",
            "credential": "MD",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Thomas Frank Myers, RN
• Marissa Christine Myres, APRN,CNS
• Rahmat O NA'Allah, M.D.
• Daniah Nacarato, APN
• Meghana Nadiger, M.D.
• Gurramkonda Naidu, M.D.
• Shreya Nair, DPM
• Sunitha Nair, MD
• Barbara J Nall, APN
• Nasaraiah Nallamothu, M.D.

• Pediatric Hematology & Oncology Physician in Peoria, IL
• Providers in Peoria, IL by specialty
• Pediatric Hematology & Oncology Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 16, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.