Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Robert Bryson Irwin, M.D.

Allergy Physician in Tupelo, MS · enumerated 2007.

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

National Provider Identifier

1174640643

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Registry record

Entity type Individual (Type 1)

Name Dr. Robert Bryson Irwin

Credential M.D.

Sex Male

Practice address Tupelo, MS, 38801

Phone (662) 844-5080

Fax (662) 680-6958

Enumeration date Mar 22, 2007

Last updated in NPPES Jul 9, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207KA0200X Allergy Physician Allopathic & Osteopathic Physicians · License 08362 (MS) 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 NPI 1174640643 active?

Yes, as of the latest NPPES snapshot, NPI 1174640643 is active (record last updated 2007-07-09).

How do I verify Robert Irwin's NPI record?

Cross-check NPI 1174640643 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Ruth Bibeau Psychiatric/Mental Health Nurse Practitioner · Tupelo, MS NPI 1851983704

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.