Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Brett R Grebing, MD

Orthopaedic Surgery Physician in Maryville, IL · enumerated 2005 · practices at Maryville Physicians Services Inc.

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

National Provider Identifier

1447252978

Verified

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Registry record

Entity type Individual (Type 1)

Name Dr. Brett R Grebing

Credential MD

Sex Male

Practice address 6812 State Route 162, Suite 123, Maryville, IL, 62062

Phone (618) 288-9460

Fax (618) 288-9461

Enumeration date Aug 15, 2005

Last updated in NPPES Jan 16, 2013

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 113320 (MO) Primary

207XX0004X Orthopaedic Foot and Ankle Surgery Physician Allopathic & Osteopathic Physicians · License 113320 (MO) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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

What is the NPI number for Brett Grebing?

The National Provider Identifier (NPI) for Brett Grebing is 1447252978, a Type 1 (individual) record in the CMS NPPES registry.

Where does Brett Grebing practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-01-16.