Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Robert Gordon Hamilton, PH.D.

Immunology Pathology Specialist/Technologist in Baltimore, MD · enumerated 2007.

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

National Provider Identifier

1023217205

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Registry record

Entity type Individual (Type 1)

Name Dr. Robert Gordon Hamilton

Credential PH.D.

Sex Male

Practice address 5501 Hopkins Bayview Cir, Room 1a20, Jh Asthma Allergy Center, Baltimore, MD, 21224

Phone (410) 550-2031

Fax (410) 550-2030

Enumeration date Jul 17, 2007

Last updated in NPPES Jul 17, 2007

Taxonomy & licenses

246QI0000X Immunology Pathology Specialist/Technologist Technologists, Technicians & Other Technical Service Providers · License 310 (MD) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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.

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Frequently asked questions

Is NPI 1023217205 active?

Yes, as of the latest NPPES snapshot, NPI 1023217205 is active (record last updated 2007-07-17).

How do I verify Robert Hamilton's NPI record?

Cross-check NPI 1023217205 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-17.