Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ernest Yih Chyun Lee, MD, PHD

Dermatology Physician in San Francisco, CA · enumerated 2020.

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

National Provider Identifier

1619506359

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Registry record

Entity type Individual (Type 1)

Name Dr. Ernest Yih Chyun Lee

Credential MD, PHD

Sex Male

Practice address 1701 Divisadero St, San Francisco, CA, 94115

Phone (415) 353-7800

Enumeration date Apr 4, 2020

Last updated in NPPES Apr 7, 2026

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License A185902 (CA) 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

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 Ernest Lee?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-07.