Larissa Tian, PA

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

0110006747 Issued in VA

Practice address

4320 Seminary Rd
Alexandria, VA 22304-1535

Phone

(703) 504-3000

Fax

(703) 504-3388

NPI assigned

Feb 9, 2009

Sex

Female

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in GA, MA2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 2

Specialty

Physician Assistant

Education

Other, 2008

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Umass Memorial Medical Group IncGroup PAC ID 4284539891, 2,494 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Umass Memorial Medical Center/University Campus Hospital, Worcester, MA, CCN 220163

Merit-based Incentive Payment System (MIPS)

Final score

100 of 100Reported as apm

Quality

82.98

Promoting interoperability

100

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

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 and National Provider Directory roles.

• Umass Memorial Medical Group Inc

  • Internal Medicine Physician
  • Worcester, MA
  • NPI 1760445373

  Physician Assistant

  Medicare reassignment Care Compare group NPD (past)
• Lahey Clinic, Inc

  • Internal Medicine Physician
  • Peabody, MA
  • NPI 1063447316
  Medicare reassignment NPD
• Lahey Clinic, Inc.

  dba Lahey Clinic

  • Internal Medicine Physician
  • Burlington, MA
  • NPI 1538194980
  Medicare reassignment NPD
• Gwinnett Physician Group, LLC

  • Internal Medicine Physician
  • Lawrenceville, GA
  • NPI 1578574661
  Medicare reassignment
• Radiology Associates of Atlanta, PA

  • Diagnostic Radiology Physician
  • Atlanta, GA
  • NPI 1528043718
  Medicare reassignment
• Umass Memorial Medical Group, Inc.

  dba Urgent Care Express at Harrington

  • Urgent Care Clinic/Center
  • Oxford, MA
  • NPI 1982381018
  NPD
• Atlanta Pulmonary Group, LLC

  • Pulmonary Disease Physician
  • Atlanta, GA
  • NPI 1326128562
  NPD (past)
• Critical Care Atlanta, LLC

  • Critical Care Medicine (Internal Medicine) Physician
  • Atlanta, GA
  • NPI 1407012586
  NPD (past)
• Gwinnett Medical Group, Inc

  • General Practice Physician
  • Lawrenceville, GA
  • NPI 1780747469
  NPD (past)

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

• Umass Memorial Medical Center, Inc.

  • General Acute Care Hospital
  • Worcester, MA
  • NPI 1831151455
  Care Compare affiliation

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

{
    "created_epoch": "1234137600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787616000000",
    "number": "1922247345",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3300 GALLOWS RD",
            "city": "FALLS CHURCH",
            "state": "VA",
            "postal_code": "220423300",
            "telephone_number": "703-776-4011"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4320 SEMINARY RD",
            "city": "ALEXANDRIA",
            "state": "VA",
            "postal_code": "223041535",
            "telephone_number": "703-504-3000",
            "fax_number": "703-504-3388"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "44045 Riverside Pkwy",
            "address_purpose": "LOCATION",
            "city": "Leesburg",
            "state": "VA",
            "postal_code": "201765101",
            "country_code": "US",
            "telephone_number": "703-858-6000",
            "fax_number": "703-858-6900",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "3600 Joseph Siewick Dr",
            "address_purpose": "LOCATION",
            "city": "Fairfax",
            "state": "VA",
            "postal_code": "220331709",
            "country_code": "US",
            "telephone_number": "703-391-3600",
            "fax_number": "703-391-3414",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "2501 Parkers Ln",
            "address_purpose": "LOCATION",
            "city": "Alexandria",
            "state": "VA",
            "postal_code": "223063209",
            "country_code": "US",
            "telephone_number": "703-664-7000",
            "fax_number": "703-664-7666",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "3300 Gallows Rd",
            "address_purpose": "LOCATION",
            "city": "Falls Church",
            "state": "VA",
            "postal_code": "220423300",
            "country_code": "US",
            "telephone_number": "703-776-4001",
            "fax_number": "703-776-7113",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "TIAN",
        "first_name": "LARISSA",
        "credential": "PA",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2009-02-09",
        "last_updated": "2026-08-25",
        "certification_date": "2026-08-25",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "GA",
            "license": "5526",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "VA",
            "license": "0110006747",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Sierra Ashley Thorpe
• Three a & Associates LLC
• Thrive Behavioral Health and Wellness, Inc
• Thriving ABA Therapy, LLC
• Thuan Nguyen DDS, PC (5130-8 Duke Street Dental)
• Tidings Out of the East Inc. (DC Primary Care)
• Ruth R Tifford
• Ruth Tiguh
• Abdullah Tikreeti, DMD
• Mirnesa Tikvina, MSN, CRNP, FNP-BC

• Physician Assistant in Alexandria, VA
• Providers in Alexandria, VA by specialty
• Physician Assistant in Virginia

• 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.