Stephen Andrew Sebastian, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

MD60004641 Issued in DC

Practice address

110 Irving Street NW
Department of Medicine
Washington, DC 20010

Phone

(202) 877-8278

NPI assigned

Jun 28, 2019

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

Medicare fee-for-service enrollment

Enrolled in VA, DC2 enrollments

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 2

Specialty

Internal Medicine

Education

Other, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Medstar Medical Group II LLCGroup PAC ID 0547413825, 3,726 clinicians

Riverside Physician Services IncGroup PAC ID 5092608448, 793 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Medstar Washington Hospital Center Hospital, Washington, DC, CCN 090011
• Riverside Shore Memorial Hospital Hospital, Onancock, VA, CCN 490037

Merit-based Incentive Payment System (MIPS)

Final score

94.91 of 100Reported as apm

Quality

92.86

Promoting interoperability

94.93

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: ssebastian192419@direct.rivhs.com

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.

• Medstar Medical Group II LLC

  • General Practice Physician
  • Baltimore, MD
  • NPI 1184046187

  DC

  Medicare reassignment Care Compare group NPD
• Riverside Physician Services Inc

  • Gastroenterology Physician
  • Newport News, VA
  • NPI 1194929026
  Medicare reassignment Care Compare group NPD
• Medstar Medical Group II LLC

  • Hospitalist Physician
  • Washington, DC
  • NPI 1770198301

  Internal Medicine

  NPD
• Riverside Physician Services Inc

  • Gastroenterology Physician
  • Williamsburg, VA
  • NPI 1083867311
  NPD
• Riverside Physician Services, Inc.

  • Family Medicine Physician
  • Newport News, VA
  • NPI 1710020623

  Internal Medicine

  NPD
• Medstar Washington Hospital Center

  • General Acute Care Hospital
  • Washington, DC
  • NPI 1548378235
  NPD (past)

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

• Medstar Washington Hospital Center

  • General Acute Care Hospital
  • Washington, DC
  • NPI 1548378235
  Care Compare affiliation
• Shore Health Services Inc.

  • Rural Acute Care Hospital
  • Onancock, VA
  • NPI 1619076916
  Care Compare affiliation

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

{
    "created_epoch": "1561680000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1756771200000",
    "number": "1386206449",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3114 SHERMAN AVE NW",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200101533",
            "telephone_number": "267-330-9439"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "110 IRVING STREET NW",
            "address_2": "DEPARTMENT OF MEDICINE",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "20010",
            "telephone_number": "202-877-8278"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SEBASTIAN",
        "first_name": "STEPHEN",
        "middle_name": "ANDREW",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-06-28",
        "last_updated": "2025-09-02",
        "certification_date": "2025-09-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "DC",
            "license": "MD60004641",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Sandra Seawell
• Gino Seawright
• Jeffrey Scott Seay, RN, BSN, MHSM
• Seba Professional Services, LLC
• Iona Sebastian, MSW,LICSW
• Aniya Jade Sebens
• Mekdes Sebisebe
• Betelhem E Seboka
• Genet Sebsibe
• Cristina M Secarea, M.D

• Internal Medicine Physician in Washington, DC
• Providers in Washington, DC by specialty
• Internal Medicine Physician in District of Columbia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 2, 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.