Glenn R Hornstein, MD

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

D0050555 Issued in MD

Practice address

100 East Carroll Street
Silisbury, MD 21801

Phone

(410) 543-7100

NPI assigned

Jan 10, 2006

Last updated

Jul 13, 2026By the provider in NPPES

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 MD

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

Merit-based Incentive Payment System (MIPS)

Final score

96.26 of 100Reported as group

Quality

91.08

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Interoperability endpoints

• Direct secure messaging: glennhornstein@agh.allscriptsdirect.net

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.

• Emergency Service Associates PA

  • Emergency Medicine Physician
  • Salisbury, MD
  • NPI 1558340562
  Medicare reassignment
• Trustees of Columbia University in the City of New York

  dba Associates in Emergency Services

  • Emergency Medicine Physician
  • New York, NY
  • NPI 1073524369
  NPD (past)
• Trustees of Columbia University in the City of New York

  • Internal Medicine Physician
  • Fort Lee, NJ
  • NPI 1982993184
  NPD (past)

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

{
    "created_epoch": "1136851200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1245219260",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 3012",
            "city": "WILMINGTON",
            "state": "DE",
            "postal_code": "19804",
            "telephone_number": "302-224-5678",
            "fax_number": "302-224-2848"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "100 EAST CARROLL STREET",
            "city": "SILISBURY",
            "state": "MD",
            "postal_code": "21801",
            "telephone_number": "410-543-7100"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HORNSTEIN",
        "first_name": "GLENN",
        "middle_name": "R",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-01-10",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "MD",
            "license": "D0050555",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.