Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Andrew Yoowon Lee, M.D.

Radiation Oncology Physician in Barrington, IL · enumerated 2012.

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

National Provider Identifier

1407118359

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Registry record

Entity type Individual (Type 1)

Name Dr. Andrew Yoowon Lee

Credential M.D.

Sex Male

Practice address 27750 W State Route 22 Ste G50, Barrington, IL, 60010

Phone (478) 842-0300

Fax (847) 842-0370

Enumeration date Jun 15, 2012

Last updated in NPPES Dec 25, 2021

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 62186 (MN) Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 036148380 (IL) Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 126.061489 (IL) 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
036148380	Other	IL	STATE LICENSE

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.

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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 Andrew Lee?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-25.