NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Grayson Stewart, M.D.

Radiation Oncology Physician in Augusta, GA · enumerated 2007 · practices at Radiation Oncology Associates.

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

National Provider Identifier

1427251412

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name John Grayson Stewart
Credential M.D.
Sex Male
Practice address 821 St. Sebastian Way, Augusta, GA, 30912
Phone (706) 721-2971
Fax (706) 721-1937
Enumeration date Jun 7, 2007
Last updated in NPPES Oct 31, 2013

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 65901 (GA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
003108921A Medicaid GA -
65901 Other GA MEDICAL LICENSE

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

How do I verify John Stewart's NPI record?
Cross-check NPI 1427251412 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1427251412 active?
Yes, as of the latest NPPES snapshot, NPI 1427251412 is active (record last updated 2013-10-31).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-10-31.