NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Gregory Oltmann Dc LLC

Chiropractor in Tigard, OR · enumerated 2023 · authorized official Gregory Oltmann, Chiropractor/Owner.

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

National Provider Identifier

1184406738

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Gregory Oltmann Dc LLC
Practice address 12700 Sw North Dakota St Ste 180, Tigard, OR, 97223
Phone (503) 716-8281
Fax (503) 716-8783
Enumeration date Oct 18, 2023
Last updated in NPPES Apr 10, 2024

Taxonomy & classification

111N00000X Chiropractor Chiropractic Providers Primary
261Q00000X Clinic/Center Ambulatory Health Care Facilities Secondary

Authorized official

Name Gregory Oltmann
Title Chiropractor/Owner
Phone (503) 888-1314

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

What is the NPI number for Gregory Oltmann Dc LLC?
The NPI for Gregory Oltmann Dc LLC is 1184406738, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for Gregory Oltmann Dc LLC?
NPPES lists Gregory Oltmann (Chiropractor/Owner) as the authorized official for this organization.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-04-10.