Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Geoffrey Cornell Koelling, DMD

General Practice Dentistry in Tucson, AZ · enumerated 2006.

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

National Provider Identifier

1689746232

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Registry record

Entity type Individual (Type 1)

Name Dr. Geoffrey Cornell Koelling

Credential DMD

Sex Male

Practice address 2102 N Country Club Rd, Suite A, Tucson, AZ, 85716

Phone (520) 323-1400

Enumeration date Nov 15, 2006

Last updated in NPPES Aug 7, 2019

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 09846 (NC) Secondary

1223G0001X General Practice Dentistry Dental Providers · License D05019 (AZ) Primary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Geoffrey Koelling's NPI record?

Cross-check NPI 1689746232 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1689746232 active?

Yes, as of the latest NPPES snapshot, NPI 1689746232 is active (record last updated 2019-08-07).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-08-07.