Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory John Roberts, M.D.

Surgery Physician in Indianapolis, IN · enumerated 2012.

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

National Provider Identifier

1659646735

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory John Roberts

Credential M.D.

Sex Male

Practice address 8240 Naab Rd Ste 100, Indianapolis, IN, 46260

Phone (317) 338-7450

Fax (317) 338-7464

Enumeration date Mar 21, 2012

Last updated in NPPES Aug 3, 2018

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 01076405A (IN) Primary

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

Where does Gregory Roberts practice?

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

What is the NPI number for Gregory Roberts?

The National Provider Identifier (NPI) for Gregory Roberts is 1659646735, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-08-03.