Aathi Lakshmi Mariappan

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

68290 Issued in TN

Practice address

990 Oak Ridge Tpke
Oak Ridge, TN 37830-6976

Phone

(865) 835-1000

Fax

(865) 835-4303

NPI assigned

Jul 3, 2020

Last updated

Jul 8, 2025By 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 1

Addresses

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

Internal Medicine

Education

Other, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Hospital Medicine Services of Tennessee PCGroup PAC ID 9234432881, 157 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Amedisys Home Health Care Home health agency, Knoxville, TN, CCN 447312
• Covenant Homecare Home health agency, Knoxville, TN, CCN 447139
• Methodist Medical Center of Oak Ridge Hospital, Oak Ridge, TN, CCN 440034
• Roane Medical Center Hospital, Harriman, TN, CCN 440031

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.

• Hospital Medicine Services of Tennessee PC

  • Hospitalist Physician
  • Lawrenceburg, IN
  • NPI 1528433802

  Internal Medicine, TN

  Medicare reassignment Care Compare group NPD

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

• Comprehensive Home Healthcare Services LLC

  dba Amedisys Home Health Care

  • Home Health Agency
  • Knoxville, TN
  • NPI 1710935408
  Care Compare affiliation
• Covenant Homecare

  • Home Health Agency
  • Knoxville, TN
  • NPI 1982690640
  Care Compare affiliation
• Methodist Medical Center

  • General Acute Care Hospital
  • Oak Ridge, TN
  • NPI 1700870672
  Care Compare affiliation
• Roane County Medical Center

  dba Covenant Health Roane

  • General Acute Care Hospital
  • Harriman, TN
  • NPI 1700036696
  Care Compare affiliation

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

{
    "created_epoch": "1593734400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1751932800000",
    "number": "1023635224",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "990 OAK RIDGE TPKE",
            "city": "OAK RIDGE",
            "state": "TN",
            "postal_code": "378306976",
            "telephone_number": "865-835-4304",
            "fax_number": "865-835-4303"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "990 OAK RIDGE TPKE",
            "city": "OAK RIDGE",
            "state": "TN",
            "postal_code": "378306976",
            "telephone_number": "865-835-1000",
            "fax_number": "865-835-4303"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MARIAPPAN",
        "first_name": "AATHI LAKSHMI",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2020-07-03",
        "last_updated": "2025-07-08",
        "certification_date": "2025-07-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "TN",
            "license": "68290",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jacquelyn Mantooth, LPC
• Chad Manuel, DO
• David Henry Marcotte, LCSW
• Sheila A Marczak, M.M.F.T
• Elizabeth H. Margle
• Mark H. Waugh, PHD, PC
• Paula Jane Marshall, D.PH.
• Charles J. Mascioli, M.D.
• Tia Mashburn
• Christopher D Maull, MD

• Internal Medicine Physician in Oak Ridge, TN
• Providers in Oak Ridge, TN by specialty
• Internal Medicine Physician in Tennessee

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 8, 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.