Mark Sittig, MD

Primary specialty

Radiation Oncology PhysicianTaxonomy code 2085R0001X

License

59257 Issued in TN

Practice address

2004 Hayes St Ste LL15
Nashville, TN 37203-2647

Phone

(615) 284-7785

Fax

(615) 284-7791

NPI assigned

Apr 3, 2014

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

Other identifiers 2

Medicare fee-for-service enrollment

Enrolled in TN

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

Tulane University School of Medicine, 2014

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Lebanon Radiation Oncology Center, LLCGroup PAC ID 7719406917, 11 clinicians

Urology Associates PCGroup PAC ID 2961392931, 42 clinicians

Tennessee Oncology PLLCGroup PAC ID 4688586134, 355 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Ascension Saint Thomas Hospital Hospital, Nashville, TN, CCN 440082
• Vanderbilt University Medical Center Hospital, Nashville, TN, CCN 440039

Merit-based Incentive Payment System (MIPS)

Final score

92.71 of 100Reported as group

Promoting interoperability

89

Improvement activities

40

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

• Lebanon Radiation Oncology Center

  • Radiology Clinic/Center
  • Lebanon, TN
  • NPI 1750080305
  Medicare reassignment Care Compare group NPD
• Tennessee Oncology PLLC

  • Hematology & Oncology Physician
  • Nashville, TN
  • NPI 1811955917
  Medicare reassignment Care Compare group NPD
• Urology Associates PC

  • Urology Physician
  • Nashville, TN
  • NPI 1043297542
  Medicare reassignment Care Compare group NPD
• Tennessee Oncology,PLLC

  • Radiation Oncology Physician
  • Nashville, TN
  • NPI 1164595070
  NPD
• Tennessee Oncology PLLC

  • Radiation Oncology Clinic/Center
  • Franklin, TN
  • NPI 1942909585
  NPD (past)

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

• Saint Thomas West Hospital

  dba Ascension Saint Thomas Hospital

  • General Acute Care Hospital
  • Nashville, TN
  • NPI 1629025648
  Care Compare affiliation
• Vanderbilt University Medical Center

  • General Acute Care Hospital
  • Nashville, TN
  • NPI 1396882205
  Care Compare affiliation

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

{
    "created_epoch": "1396483200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1771977600000",
    "number": "1275951519",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2004 HAYES ST STE 800",
            "city": "NASHVILLE",
            "state": "TN",
            "postal_code": "372032659",
            "telephone_number": "615-329-0570",
            "fax_number": "615-329-0579"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2004 HAYES ST STE LL15",
            "city": "NASHVILLE",
            "state": "TN",
            "postal_code": "372032647",
            "telephone_number": "615-284-7785",
            "fax_number": "615-284-7791"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2801 Charlotte Ave",
            "address_purpose": "LOCATION",
            "city": "Nashville",
            "state": "TN",
            "postal_code": "372094035",
            "country_code": "US",
            "telephone_number": "615-250-9200",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SITTIG",
        "first_name": "MARK",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2014-04-03",
        "last_updated": "2026-02-25",
        "certification_date": "2026-02-25",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "TN",
            "license": "59257",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "7100617580",
            "state": "KY"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "Q051113",
            "state": "TN"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Priyanka Prakash Sista, M.D.
• Sheila Sitarich, CRNA
• Silvio Sitarich, MD
• Lorien Y Sites, MD
• Rachel Sites
• Sitting Techs, Inc.
• Caroline A Sitzman, RN
• Athira Sivadas
• Amber Sivalls
• Hadley Burns Sivley, MD

• Radiation Oncology Physician in Nashville, TN
• Providers in Nashville, TN by specialty
• Radiation Oncology Physician in Tennessee

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