Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Joel S. Leifheit M.D., P.C.

Internal Medicine Physician in Peru, IL · enumerated 2007 · authorized official Joel Leifheit, President.

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

National Provider Identifier

1841312980

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Registry record

Entity type Organization (Type 2)

Legal business name Joel S. Leifheit M.D., P.C.

Practice address 920 West St, Suite 111, Peru, IL, 61354

Phone (815) 223-4273

Fax (815) 223-4328

Enumeration date Apr 6, 2007

Last updated in NPPES Jan 7, 2008

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name Joel Leifheit

Title President

Phone (815) 223-4273

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 is Joel S. Leifheit M.D., P.C. located?

The practice location on file with NPPES is in Peru, IL.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2008-01-07. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-01-07.