Individual provider Active NPI

Clayton Aldon Alfonso, MD

  • Obstetrics & Gynecology Physician
  • Durham, NC
National Provider Identifier
1790028843
Registry record updated Jul 24, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Obstetrics & Gynecology PhysicianTaxonomy code 207V00000X
License
201602541 Issued in NC
Practice address
2301 Erwin Rd
Durham, NC 27710
Phone
(919) 684-8111
NPI assigned
Mar 27, 2013
Last updated
Jul 24, 2026By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 24, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Obstetrics & Gynecology Physician 207V00000X 201602541 NC Primary
Obstetrics & Gynecology Physician 207V00000X 0101278958 VA

Addresses

Primary practice location

2301 Erwin Rd
Durham, NC 27710

Mailing address

2301 Erwin Rd
Durham, NC 27710
Phone (919) 684-8111

Medicare participation

Medicare enrollment files
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

Enrollment IDStateProvider typePAC IDDetails
I20170703000529 NC Practitioner - Obstetrics/Gynecology 0143599357 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Obstetrics/Gynecology
Education
Other, 2013
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)

10207 Cerny St
Raleigh, NC 27617-4887
Phone (919) 684-8111

40 Duke Medicine Cir
Durham, NC 27710-4000
Phone (919) 684-8111

5324 McFarland Rd
Durham, NC 27707-6864
Phone (919) 684-8111

5601 Arringdon Park Dr
Morrisville, NC 27560-5676
Phone (919) 684-8111

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
201602541NCMDObstetrics & Gynecology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Duke Health Integrated Practice, Inc. CurrentSince Jul 1, 2023 Accepting new patients

Locations

2301 Erwin Rd
Durham, NC 27705
Phone (919) 668-0289

2608 Erwin Rd
Ste 200
Durham, NC 27705
Phone (919) 684-2595

40 Duke Medicine Cir
Durham, NC 27710
Phone (919) 681-6588

5324 McFarland Rd
Ste 300
Durham, NC 27707
Phone (919) 684-2471

5601 Arringdon Park Dr
Morrisville, NC 27560
Phone (888) 275-3853

10207 Cerny St
Ste 302
Raleigh, NC 27617
Phone (919) 206-4880

Interoperability endpoints

  • Direct secure messaging: calfonso147066@direct.medicine.duke.edu

Organizations & group practices 1

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.

Hospital & facility affiliations 6

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

NPI Registry JSON

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

{
    "created_epoch": "1364342400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1784851200000",
    "number": "1790028843",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2301 ERWIN RD",
            "city": "DURHAM",
            "state": "NC",
            "postal_code": "27710",
            "telephone_number": "919-684-8111"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2301 ERWIN RD",
            "city": "DURHAM",
            "state": "NC",
            "postal_code": "27710",
            "telephone_number": "919-684-8111"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ALFONSO",
        "first_name": "CLAYTON",
        "middle_name": "ALDON",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2013-03-27",
        "last_updated": "2026-07-24",
        "certification_date": "2026-07-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "NC",
            "license": "201602541",
            "primary": true
        },
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "VA",
            "license": "0101278958",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Durham, NC

Sources for this page

Verify at the official NPI Registry.