Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Allan J Olthoff Do Sc

Q: What is the NPI number for Allan J Olthoff Do Sc?

The NPI for Allan J Olthoff Do Sc is 1003959933, a Type 2 (organization) record in the CMS NPPES registry.

Health Service Clinic/Center in Deerfield, IL · enumerated 2007 · authorized official Allan Olthoff, President.

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

National Provider Identifier

1003959933

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Registry record

Entity type Organization (Type 2)

Legal business name Allan J Olthoff Do Sc

Practice address 400 Lake Cook Rd, 200c, Deerfield, IL, 60015

Phone (847) 267-0260

Fax (847) 282-3862

Enumeration date Feb 14, 2007

Last updated in NPPES Jul 31, 2008

Taxonomy & classification

261QH0100X Health Service Clinic/Center Ambulatory Health Care Facilities · License 036064582 (IL) Primary

Authorized official

Name Allan Olthoff

Title President

Phone (312) 623-3007

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

Who is the authorized official for Allan J Olthoff Do Sc?

NPPES lists Allan Olthoff (President) as the authorized official for this organization.

What is the NPI number for Allan J Olthoff Do Sc?

The NPI for Allan J Olthoff Do Sc is 1003959933, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-07-31.