John Gunn Lee, MD

John Gunn Lee is a Gastroenterology Physician provider (Internal Medicine) practicing in Orange, CA, registered in the NPPES registry with NPI 1487734521 since 2006. The credential MD stands for Doctor of Medicine.

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NPI	1487734521
Entity type	Individual (Type 1)
Name	John Gunn Lee
Credential	MD
Sex	Male
Practice address	101 THE CITY DRIVE SOUTH, UCI MEDICAL CENTER, Orange, CA, 92868
Phone	7144568978
Enumeration date	2006-10-16
Last updated in NPPES	2014-03-26

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
207RG0100X	Gastroenterology Physician	Primary	000000G63678	CA

MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Copy-ready billing details

Provider: John Lee, MD
NPI: 1487734521
Taxonomy: 207RG0100X (Gastroenterology Physician)
Address: 101 THE CITY DRIVE SOUTH, UCI MEDICAL CENTER, Orange, CA, 92868

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1851378392	Scott Engwall	Individual	Anesthesiology Physician	Orange, CA
1912963612	Michael Menchine	Individual	Emergency Medicine Physician	Orange, CA
1427016039	Robert Bristow	Individual	Gynecologic Oncology Physician	Orange, CA
1376599076	Alan Hanft	Individual	Psychiatry Physician	Orange, CA
1669577276	Susan O'Brien	Individual	Medical Oncology Physician	Orange, CA
1639263999	Martin Tynan	Individual	Orthopaedic Trauma Physician	Orange, CA
1366614216	Lauri Thrupp	Individual	Infectious Disease Physician	Orange, CA
1811159197	Lilit Mnatsakanyan	Individual	Epilepsy Physician	Orange, CA

Verify this record

Cross-check NPI 1487734521 against the authoritative CMS record: view John Gunn Lee on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

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.

What specialty is John Lee?

John Lee is registered in NPPES with the primary taxonomy of Gastroenterology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2014-03-26.