NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Sean Patrick Ryan, M.D.

Vascular Surgery Physician in Lewes, DE · enumerated 2007 · practices at First State Orthopaedics PA.

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

National Provider Identifier

1891991402

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Sean Patrick Ryan
Credential M.D.
Sex Male
Practice address Lewes, DE, 19958
Phone (302) 644-4954
Fax (302) 645-5481
Enumeration date Jun 21, 2007
Last updated in NPPES Sep 2, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 1891991402 (DE) Primary
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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Sean Ryan?
The National Provider Identifier (NPI) for Sean Ryan is 1891991402, a Type 1 (individual) record in the CMS NPPES registry.
Where does Sean Ryan practice?
The practice location on file with NPPES is in Lewes, DE. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-02.