Michael Robert Siedow, M.D.

Primary specialty

Radiation Oncology PhysicianTaxonomy code 2085R0001X

License

35.145631 Issued in OH

Practice address

300 Polaris Pkwy Ste 110
Westerville, OH 43082-7989

Phone

(614) 788-3333

Fax

(614) 788-3332

NPI assigned

Mar 31, 2017

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Electronic endpoints 2

Medicare fee-for-service enrollment

Enrolled in OH

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

Specialty

Radiation Oncology

Education

Toledo Medical College, 2017

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Ohiohealth CorporationGroup PAC ID 6305758426, 2,295 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Ohiohealth Mansfield Hospital Hospital, Mansfield, OH, CCN 360118
• Grant Medical Center Hospital, Columbus, OH, CCN 360017
• Ohiohealth Shelby Hospital Hospital, Shelby, OH, CCN 361324
• Riverside Methodist Hospital Hospital, Columbus, OH, CCN 360006
• Bucyrus Community Hospital Hospital, Bucyrus, OH, CCN 361316

Merit-based Incentive Payment System (MIPS)

Final score

80.04 of 100Reported as group

Quality

58.67

Promoting interoperability

98

Improvement activities

40

Cost

76.46

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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.

• Ohiohealth Corporation

  dba OhioHealth Physician Group, Inc

  • Family Medicine Physician
  • Columbus, OH
  • NPI 1578545273
  Medicare reassignment Care Compare group NPD
• Ohiohealth Corporation

  dba OhioHealth Physician Group Inc

  • Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
  • Columbus, OH
  • NPI 1265627301
  NPD
• Ohiohealth Corporation

  dba OhioHealth Physician Group Inc

  • Anesthesiology Physician
  • Columbus, OH
  • NPI 1407292105
  NPD
• Osu Radiation Oncology LLC

  • Radiation Oncology Physician
  • Columbus, OH
  • NPI 1013015825
  NPD (past)

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

• Bucyrus Community Hospital LLC

  dba Bucyrus Community Hospital

  • Critical Access Hospital
  • Bucyrus, OH
  • NPI 1104914274
  Care Compare affiliation
• Medcentral Health System

  • Critical Access Hospital
  • Mansfield, OH
  • NPI 1487706016
  Care Compare affiliation
• Medcentral Health System

  • General Acute Care Hospital
  • Mansfield, OH
  • NPI 1790837235
  Care Compare affiliation
• Medcentral Health System

  dba Mansfield Laboratory Services

  • Clinical Medical Laboratory
  • Mansfield, OH
  • NPI 1962888016

  Hospital

  Care Compare affiliation
• Ohiohealth Corporation

  dba Grant Medical Center

  • General Acute Care Hospital
  • Columbus, OH
  • NPI 1255377149
  Care Compare affiliation
• Ohiohealth Corporation

  dba Riverside Methodist Hospital

  • General Acute Care Hospital
  • Columbus, OH
  • NPI 1467484972
  Care Compare affiliation
• Ohiohealth Corporation

  dba OhioHealth Laboratory Systems

  • Clinical Medical Laboratory
  • Columbus, OH
  • NPI 1710916945

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1490918400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787616000000",
    "number": "1891227567",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 7527",
            "city": "DUBLIN",
            "state": "OH",
            "postal_code": "430170727",
            "telephone_number": "614-788-6010"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 POLARIS PKWY STE 110",
            "city": "WESTERVILLE",
            "state": "OH",
            "postal_code": "430827989",
            "telephone_number": "614-788-3333",
            "fax_number": "614-788-3332"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SIEDOW",
        "first_name": "MICHAEL",
        "middle_name": "ROBERT",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2017-03-31",
        "last_updated": "2026-08-25",
        "certification_date": "2026-08-25",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "OH",
            "license": "35.145631",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "msiedow183319@direct.ohiohealth.com",
            "affiliation": "Y",
            "affiliationName": "OhioHealth Corporation",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "CSV",
            "contentTypeDescription": "CSV",
            "address_1": "111 S Grant Ave",
            "city": "Columbus",
            "state": "OH",
            "country_code": "US",
            "postal_code": "432154701",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "msiedow183319@direct.ohiohealth.com",
            "affiliation": "Y",
            "affiliationName": "OhioHealth Physician Group, Inc.",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "CSV",
            "contentTypeDescription": "CSV",
            "address_1": "111 S Grant Ave",
            "city": "Columbus",
            "state": "OH",
            "country_code": "US",
            "postal_code": "432154701",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Malak Shuman
• Caroline Shuttleworth
• Megan Sickles
• Amanda Lee Siders, RBT
• Jessica Siebold
• Lori Lynn Siegel, MS, ATC
• Ronald J. Siegle, MD
• Dawn Renae Sifft, D.C.
• Taylor Sikich, BCBA/COBA
• Nadia Silva

• Radiation Oncology Physician in Westerville, OH
• Providers in Westerville, OH by specialty
• Radiation Oncology Physician in Ohio

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 25, 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.