Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Charles E. Greer, D.N.

Naprapath in Chicago, IL · enumerated 2007.

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

National Provider Identifier

1083730733

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Registry record

Entity type Individual (Type 1)

Name Dr. Charles E. Greer

Credential D.N.

Sex Male

Practice address Chicago, IL, 60649

Phone (773) 308-4412

Enumeration date Mar 22, 2007

Last updated in NPPES Dec 5, 2014

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 181-000201 (IL) Secondary

172P00000X Naprapath Other Service Providers · License 181-000201 (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

Is NPI 1083730733 active?

Yes, as of the latest NPPES snapshot, NPI 1083730733 is active (record last updated 2014-12-05).

How do I verify Charles Greer's NPI record?

Cross-check NPI 1083730733 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-12-05.