Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Tommy Kwak, M.D.

Internal Medicine Physician in Vernon Hills, IL · enumerated 2013 · practices at Illumihealth Ltd.

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

National Provider Identifier

1235472820

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Registry record

Entity type Individual (Type 1)

Name Tommy Kwak

Credential M.D.

Sex Male

Practice address 270 Center Dr Ste 120, Vernon Hills, IL, 60061

Phone (847) 200-1002

Fax (224) 298-0432

Enumeration date Apr 1, 2013

Last updated in NPPES Sep 12, 2024

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 036139684 (IL) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036.139684 (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
036139684	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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Tommy Kwak's NPI record?

Cross-check NPI 1235472820 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1235472820 active?

Yes, as of the latest NPPES snapshot, NPI 1235472820 is active (record last updated 2024-09-12).

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Illumihealth Ltd Internal Medicine Physician · Vernon Hills, IL NPI 1780432740

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-09-12.