Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Phillip Terlep, D.C.

Chiropractor in Crystal Lake, IL · enumerated 2010.

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

National Provider Identifier

1881917623

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Registry record

Entity type Individual (Type 1)

Name Dr. John Phillip Terlep

Credential D.C.

Sex Male

Practice address 8600 Us Highway 14, Suite 140, Crystal Lake, IL, 60012

Phone (815) 922-2654

Enumeration date Mar 8, 2010

Last updated in NPPES Mar 8, 2010

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 038-007300 (IL) Primary

DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC 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.

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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 John Terlep?

John Terlep is registered in NPPES with the primary taxonomy of Chiropractor. 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 2010-03-08.