NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Charles C Duncan, MD

Neurological Surgery Physician in New Haven, CT · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1417948688

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Charles C Duncan
Credential MD
Sex Male
Practice address 20 York St, Ynhh- Children'S Hosp. - West Pavillion 2nd Fl, New Haven, CT, 06510
Phone (203) 785-2809
Fax (203) 785-6916
Enumeration date Nov 4, 2005
Last updated in NPPES Jun 27, 2008

Taxonomy & licenses

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License 018809 (CT) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
001188093 Medicaid CT -

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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Charles Duncan's NPI record?
Cross-check NPI 1417948688 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1417948688 active?
Yes, as of the latest NPPES snapshot, NPI 1417948688 is active (record last updated 2008-06-27).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-06-27.