Rex McCallum, MD

Primary specialty

Rheumatology PhysicianTaxonomy code 207RR0500X

License

27249 Issued in NC

Practice address

2351 Erwin Rd
Durham, NC 27705-4699

Phone

(919) 385-3000

Fax

(919) 576-8820

NPI assigned

Oct 25, 2006

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 NC

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

Specialty

Rheumatology

Education

Vanderbilt University School of Medicine, 1980

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Duke Health Integrated Practice IncGroup PAC ID 8325412737, 3,140 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Duke University Hospital Hospital, Durham, NC, CCN 340030

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: rmccallum488333@direct.medicine.duke.edu

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.

• Duke Health Integrated Practice, Inc.

  • General Practice Physician
  • Durham, NC
  • NPI 1205553369
  Medicare reassignment Care Compare group NPD

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

• Duke University Health System Inc

  dba Duke Raleigh Hospital, a campus of Duke University Hospital

  • Rehabilitation Hospital Unit
  • Raleigh, NC
  • NPI 1205225646
  Care Compare affiliation
• Duke University Health System Inc

  dba Duke Raleigh Hospital, a campus of Duke University Hospital

  • Clinical Medical Laboratory
  • Raleigh, NC
  • NPI 1306828108

  Hospital

  Care Compare affiliation
• Duke University Health System Inc

  dba Duke University Hospital

  • Clinical Medical Laboratory
  • Durham, NC
  • NPI 1508847047

  Hospital

  Care Compare affiliation
• Duke University Health System, Inc.

  dba Duke University Hospital

  • Land Ambulance
  • Durham, NC
  • NPI 1417954942

  Hospital

  Care Compare affiliation
• Duke University Health System, Inc.

  dba Duke University Hospital

  • Rehabilitation Hospital Unit
  • Durham, NC
  • NPI 1538166061
  Care Compare affiliation
• Duke University Health System, Inc.

  dba Duke University Hospital

  • General Acute Care Hospital
  • Durham, NC
  • NPI 1992703540
  Care Compare affiliation

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

{
    "created_epoch": "1161734400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772582400000",
    "number": "1326122219",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "40 DUKE MEDICAL CIR",
            "city": "DURHAM",
            "state": "NC",
            "postal_code": "277103006",
            "telephone_number": "919-385-3000",
            "fax_number": "919-385-8820"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2351 ERWIN RD",
            "city": "DURHAM",
            "state": "NC",
            "postal_code": "277054699",
            "telephone_number": "919-385-3000",
            "fax_number": "919-576-8820"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MCCALLUM",
        "first_name": "REX",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-10-25",
        "last_updated": "2026-03-04",
        "certification_date": "2026-03-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RR0500X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Rheumatology",
            "state": "NC",
            "license": "27249",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Karen Renee McCain, FNP
• William Sean Donovan McCain, LPCA
• Darby Shea McCall, PA-C
• Shannon Jones McCall, M.D.
• Ashanti McCallister, LMBT 09636
• McCann and Associates PLLC
• Peter St John Benedict McCann, MBBS
• Timothy McCarl
• Devin McCarthy
• Gael Diane-Elizabeth McCarthy, PH.D., B.C.D.

• Rheumatology Physician in Durham, NC
• Providers in Durham, NC by specialty
• Rheumatology Physician in North Carolina

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 4, 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.