Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory John Argyros, MD

Pulmonary Disease Physician in Olney, MD · enumerated 2006.

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

National Provider Identifier

1437129137

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Gregory John Argyros

Credential MD

Sex Male

Practice address 16809 Ethelwood Ter, Olney, MD, 20832

Phone (202) 782-6206

Fax (202) 782-6507

Enumeration date Jan 25, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License MD043212E (PA) 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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Gregory Argyros?

Gregory Argyros is registered in NPPES with the primary taxonomy of Pulmonary Disease Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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