Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Patrick Duffy, MD

Vascular Surgery Physician in Rock Hill, SC · enumerated 2008.

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

National Provider Identifier

1477726271

Verified

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Registry record

Entity type Individual (Type 1)

Name Patrick Duffy

Credential MD

Sex Male

Practice address 222 Herlong Ave S, Rock Hill, SC, 29732

Phone (803) 329-1234

Fax (803) 328-1785

Enumeration date Apr 12, 2008

Last updated in NPPES Aug 11, 2025

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License M9261 (TX) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 91032 (SC) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 34507 (NH) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 2023020247 (MO) 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
3149044	Medicaid	NH	-

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

Is NPI 1477726271 active?

Yes, as of the latest NPPES snapshot, NPI 1477726271 is active (record last updated 2025-08-11).

How do I verify Patrick Duffy's NPI record?

Cross-check NPI 1477726271 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-11.