Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Gregory Mark Boyer, D.M.D.

Dentist in Springfield, IL · enumerated 2007 · practices at Cynthia J. Lee, M.D., S.C..

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

National Provider Identifier

1477695591

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Mark Boyer

Credential D.M.D.

Sex Male

Practice address Springfield, IL, 62704

Phone (217) 546-8811

Fax (217) 546-8814

Enumeration date Feb 13, 2007

Last updated in NPPES Jul 8, 2007

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

122300000X Dentist Dental Providers 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

Where does Gregory Boyer practice?

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

What is the NPI number for Gregory Boyer?

The National Provider Identifier (NPI) for Gregory Boyer is 1477695591, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Cynthia J. Lee, M.D., S.C. Pediatrics Physician · Springfield, IL NPI 1730364845

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