Margaret Keeley Schreiber

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

C09004 Issued in MD

Practice address

201 E Irvin Ave
Hagerstown, MD 21742-3401

Phone

(240) 329-8699

NPI assigned

Apr 20, 2022

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Other names 1

• Margaret Keeley Murray Former name

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: No

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

Practice roles

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.

• Hospitalist Medicine Physicians of Maryland-Frederick PC

  • Internal Medicine Physician
  • Frederick, MD
  • NPI 1093322257
  Medicare reassignment
• Frederick Health Hospital Inc

  dba Frederick Health Hospital

  • General Acute Care Hospital
  • Frederick, MD
  • NPI 1538165527
  NPD (past)

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

{
    "created_epoch": "1650412800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1776988800000",
    "number": "1346983061",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "201 E IRVIN AVE",
            "city": "HAGERSTOWN",
            "state": "MD",
            "postal_code": "217423401",
            "telephone_number": "240-329-8699"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "201 E IRVIN AVE",
            "city": "HAGERSTOWN",
            "state": "MD",
            "postal_code": "217423401",
            "telephone_number": "240-329-8699"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SCHREIBER",
        "first_name": "MARGARET",
        "middle_name": "KEELEY",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2022-04-20",
        "last_updated": "2026-04-24",
        "certification_date": "2026-04-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "MD",
            "license": "C09004",
            "primary": true
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "MARGARET",
            "last_name": "MURRAY",
            "middle_name": "KEELEY",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Katie Elizabeth Schleigh, CNM
• Anna Schlosnagle
• Sally Schmidt, PH.D.
• Scott Kelly Schneider, PTA
• Daniel Schnurr, MD
• Zachary James Schreiber
• Jennifer Schueler Klein
• Nancy Schukraft
• Courtney Schultz, DPT
• Jessica Schultz, PHD

• Physician Assistant in Hagerstown, MD
• Providers in Hagerstown, MD by specialty
• Physician Assistant in Maryland

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 24, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.