Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Andrew Looman

Q: What is the NPI number for Mark Looman?

The National Provider Identifier (NPI) for Mark Looman is 1588167381, a Type 1 (individual) record in the CMS NPPES registry.

Hospitalist Physician in Lake Forest, IL · enumerated 2018.

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

National Provider Identifier

1588167381

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Registry record

Entity type Individual (Type 1)

Name Mark Andrew Looman

Sex Male

Practice address 1000 N Westmoreland Rd, Lake Forest, IL, 60045

Phone (847) 234-5600

Fax (847) 535-7203

Enumeration date Mar 18, 2018

Last updated in NPPES May 6, 2022

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 036158060 (IL) Primary

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

Where does Mark Looman practice?

The practice location on file with NPPES is in Lake Forest, IL. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Mark Looman?

The National Provider Identifier (NPI) for Mark Looman is 1588167381, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-05-06.