Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Robert John Postlethwaite, MD

Gastroenterology Physician in Fairfax, VA · enumerated 2020.

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

National Provider Identifier

1457988255

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Registry record

Entity type Individual (Type 1)

Name Robert John Postlethwaite

Credential MD

Sex Male

Practice address 3028 Javier Rd Ste 300, Fairfax, VA, 22031

Phone (703) 698-8960

Fax (703) 828-0961

Enumeration date Mar 24, 2020

Last updated in NPPES Jun 30, 2026

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 0101289327 (VA) 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 Robert Postlethwaite practice?

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

What is the NPI number for Robert Postlethwaite?

The National Provider Identifier (NPI) for Robert Postlethwaite is 1457988255, 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 2026-06-30.