Mary Lizzie Thomas, MD, MPH

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

73730 Issued in TN

Practice address

20 York St
New Haven, CT 06510-3220

Phone

(203) 688-4242

NPI assigned

Apr 9, 2020

Sex

Female

Sole proprietor

Yes

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 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

Indiana University School of Medicine, 2020

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Ut Regional One Physicians IncGroup PAC ID 5698993418, 314 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Regional One Health Hospital, Memphis, TN, CCN 440152

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mthomas615985@direct.ynhh.org

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.

• Ut Regional One Physicians Inc

  • Surgery Physician
  • Memphis, TN
  • NPI 1093130585

  Internal Medicine

  Medicare reassignment Care Compare group NPD
• Ut Regional One Physicians Inc

  • Anesthesiology Physician
  • Memphis, TN
  • NPI 1285042028
  NPD

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

• Shelby County Health Care Corporation

  dba Regional One Health

  • General Acute Care Hospital
  • Memphis, TN
  • NPI 1144213117
  Care Compare affiliation

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

{
    "created_epoch": "1586390400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1745971200000",
    "number": "1215556253",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 208028",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "065208028",
            "telephone_number": "203-737-8866"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "20 YORK ST",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "065103220",
            "telephone_number": "203-688-4242"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "877 Jefferson Ave",
            "address_purpose": "LOCATION",
            "city": "Memphis",
            "state": "TN",
            "postal_code": "381032807",
            "country_code": "US",
            "telephone_number": "901-545-7100",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "920 Madison Ave Ste 447",
            "address_purpose": "LOCATION",
            "city": "Memphis",
            "state": "TN",
            "postal_code": "381033438",
            "country_code": "US",
            "telephone_number": "901-448-5814",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "THOMAS",
        "first_name": "MARY",
        "middle_name": "LIZZIE",
        "credential": "MD, MPH",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2020-04-09",
        "last_updated": "2025-04-30",
        "certification_date": "2025-04-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0300X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Geriatric Medicine",
            "state": "TN",
            "license": "73730",
            "primary": false
        },
        {
            "code": "207RH0002X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hospice and Palliative Medicine",
            "state": "TN",
            "license": "73730",
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "TN",
            "license": "73730",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Donna-Ann Marie Thomas, MD
• Elizabeth Thomas
• Georgia Nichola Thomas, LCSW
• Jared Donald Thomas, MD
• Margaret Thomas, PT
• Maureen S Thomas, PH.D.
• Nannette Thomas, APRN
• Nelson Ben Thomas III
• Prakash K. Thomas, M.D.
• Robbin Zachery Thomas, M.D.

• Internal Medicine Physician in New Haven, CT
• Providers in New Haven, CT by specialty
• Internal Medicine Physician in Connecticut

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 30, 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.