Ralph Emerson Duncan III, MD

Primary specialty

Urology PhysicianTaxonomy code 208800000X

License

MD022079E Issued in PA

Practice address

25 Monument Rd
Suite 100
York, PA 17403-5060

Phone

(717) 741-4785

Fax

(717) 741-4696

NPI assigned

Jul 21, 2006

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Other identifiers 8

Medicare fee-for-service enrollment

Enrolled in PA

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

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: rduncan499599@wellspan.direct-ci.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.

• Wellspan Medical Group

  dba WellSpan Digestive Health

  • Gastroenterology Physician
  • York, PA
  • NPI 1669770004
  Medicare reassignment NPD
• Wellspan Medical Group

  dba WellSpan Urgent Care - West York

  • Clinic/Center
  • York, PA
  • NPI 1063981686
  NPD
• Wellspan Medical Group

  dba WellSpan Pediatric Surgical Specialist

  • Pediatric Surgery Physician
  • York, PA
  • NPI 1104799428
  NPD
• Wellspan Medical Group

  dba Wellspan Readycare

  • Family Medicine Physician
  • York, PA
  • NPI 1598862716
  NPD (past)

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

{
    "created_epoch": "1153440000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1759708800000",
    "number": "1851312276",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "601 MEMORY LN",
            "city": "YORK",
            "state": "PA",
            "postal_code": "174022231",
            "telephone_number": "717-851-1405"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "25 MONUMENT RD",
            "address_2": "SUITE 100",
            "city": "YORK",
            "state": "PA",
            "postal_code": "174035060",
            "telephone_number": "717-741-4785",
            "fax_number": "717-741-4696"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DUNCAN",
        "first_name": "RALPH",
        "middle_name": "EMERSON",
        "name_prefix": "Dr.",
        "name_suffix": "III",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-07-21",
        "last_updated": "2025-10-06",
        "certification_date": "2025-10-06",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208800000X",
            "taxonomy_group": "",
            "desc": "Urology",
            "state": "PA",
            "license": "MD022079E",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "THREE RIVERS",
            "identifier": "89372",
            "state": "PA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CIGNA",
            "identifier": "2237347",
            "state": "PA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE CROSS/KEYSTONE",
            "identifier": "01530901",
            "state": "PA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "UNITED HEALTHCARE",
            "identifier": "496625",
            "state": "PA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE SHIELD",
            "identifier": "078367",
            "state": "PA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "340009963",
            "state": "PA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MAMSI",
            "identifier": "26949",
            "state": "PA"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "1012374",
            "state": "PA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Natalie E Duffy, CRNP
• Ravi Dukkipati, M.D.
• Amber Marie Dull, PTA
• Cristian Dumitrescu, MD
• Jami Dumler
• Erika Dundore
• Jeffrey A. Dunkerley, DPM
• Kenneth D Dunlap Jr., DPM
• Phillip Aaron Dunn, DO
• Kathy Dunning, MD

• Urology Physician in York, PA
• Providers in York, PA by specialty
• Urology Physician in Pennsylvania

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 6, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.