Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. James Robert Duncan, MD
Dermatology Physician in Powell, OH · enumerated 2016.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1922460500
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Registry record
Entity type Individual (Type 1)
Name Dr. James Robert Duncan
Credential MD
Sex Male
Practice address 25 Hidden Ravines Dr, Powell, OH, 43065
Phone (614) 777-1200
Fax (614) 777-1294
Enumeration date Mar 23, 2016
Last updated in NPPES Dec 19, 2022
Taxonomy & licenses
207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 35.141305 (OH) Primary
207ND0101X MOHS-Micrographic Surgery Physician Allopathic & Osteopathic Physicians · License 35.141305 (OH) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
What specialty is James Duncan?
James Duncan is registered in NPPES with the primary taxonomy of Dermatology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all → Gunwant Mallik Neurological Surgery Physician · Powell, OH NPI 1376527663 Np2go Primary Care Nurse Practitioner · Powell, OH NPI 1730751181 Columbus Center for Sports and Regenerative Medicine LLC Sports Medicine (Family Medicine) Physician · Powell, OH NPI 1871310292 Apex Health Care LLC Family Medicine Physician · Powell, OH NPI 1003758756
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-12-19.