Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alan Colby, DDS

Q: What is the NPI number for Alan Colby?

The National Provider Identifier (NPI) for Alan Colby is 1578532099, a Type 1 (individual) record in the CMS NPPES registry.

General Practice Dentistry in Decatur, IL · enumerated 2006.

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

National Provider Identifier

1578532099

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Alan Colby

Credential DDS

Sex Male

Practice address 2727 N. Oakland Ave, Suite 104, Decatur, IL, 62526

Phone (217) 875-4555

Fax (217) 233-6792

Enumeration date Mar 16, 2006

Last updated in NPPES Dec 3, 2015

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 019-017703 (IL) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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

Where does Alan Colby practice?

The practice location on file with NPPES is in Decatur, IL. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Alan Colby?

The National Provider Identifier (NPI) for Alan Colby is 1578532099, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-12-03.