Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
John Duggan
Surgery Physician in Bethesda, MD · enumerated 2018.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1255821237
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Registry record
Entity type Individual (Type 1)
Name John Duggan
Sex Male
Practice address General Surgery Residency Program, Walter Reed Nmmc, 8901 Wisconsin Ave, Bethesda, MD, 20889
Phone (301) 400-2185
Enumeration date May 15, 2018
Last updated in NPPES Jul 5, 2024
Taxonomy & licenses
390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
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
Where does John Duggan practice?
The practice location on file with NPPES is in Bethesda, MD. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Duggan?
The National Provider Identifier (NPI) for John Duggan is 1255821237, a Type 1 (individual) record in the CMS NPPES registry.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-05.