Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregg Allen Rees, DDS

Q: What is the NPI number for Gregg Rees?

The National Provider Identifier (NPI) for Gregg Rees is 1659432045, a Type 1 (individual) record in the CMS NPPES registry.

General Practice Dentistry in Quincy, IL · enumerated 2006.

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

National Provider Identifier

1659432045

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregg Allen Rees

Credential DDS

Sex Male

Practice address 3011 Maine, #1, Quincy, IL, 62301

Phone (217) 223-9446

Fax (217) 223-9446

Enumeration date Dec 12, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers 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 Gregg Rees practice?

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

What is the NPI number for Gregg Rees?

The National Provider Identifier (NPI) for Gregg Rees is 1659432045, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.