Shannon Leigh Dummer, DNP, FNP, CEN

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

R246089 Issued in MD

Practice address

1352 Walnut Ave
Annapolis, MD 21403-4748

Phone

(443) 221-8716

Fax

(949) 437-8515

NPI assigned

Apr 10, 2023

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other names 1

• Shannon Leigh O'Connor 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

Nurse Practitioner

State licenses

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.

• 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": "1681084800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1784764800000",
    "number": "1588359210",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1352 WALNUT AVE",
            "city": "ANNAPOLIS",
            "state": "MD",
            "postal_code": "214034748",
            "telephone_number": "443-221-8716",
            "fax_number": "949-437-8515"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1352 WALNUT AVE",
            "city": "ANNAPOLIS",
            "state": "MD",
            "postal_code": "214034748",
            "telephone_number": "443-221-8716",
            "fax_number": "949-437-8515"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DUMMER",
        "first_name": "SHANNON",
        "middle_name": "LEIGH",
        "name_prefix": "Dr.",
        "credential": "DNP, FNP, CEN",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2023-04-10",
        "last_updated": "2026-07-23",
        "certification_date": "2026-07-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "MD",
            "license": "R246089",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "SHANNON",
            "last_name": "O'CONNOR",
            "middle_name": "LEIGH",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Mara Robertson Duffy, LCSW-C
• Marit Connor Duffy, M.D.
• Dugan Aesthetics & Wellness Center, LLC
• Claire Susan Duggal, M.D.
• David Andrew Dummer
• Kimberly Ann Dunay-Kallal, DPT, PT
• Milly Duncan Rhudy
• Carl Ronald Duncan, MD
• Stephanie Duncan, PT
• Shariff Sa'Id Dunlap, M.D.

• Family Nurse Practitioner in Annapolis, MD
• Providers in Annapolis, MD by specialty
• Family Nurse Practitioner in Maryland

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 23, 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.