Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Robert L. Irby Jr., OD
Optometrist in Holdenville, OK · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1942200969
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Registry record
Entity type Individual (Type 1)
Name Robert L. Irby Jr.
Credential OD
Sex Male
Practice address 121 W Main St, Holdenville, OK, 74848
Phone (405) 379-3610
Fax (405) 379-2019
Enumeration date Aug 1, 2005
Last updated in NPPES Jun 29, 2009
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD 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.
Frequently asked questions
Where does Robert Irby practice?
The practice location on file with NPPES is in Holdenville, OK. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Robert Irby?
The National Provider Identifier (NPI) for Robert Irby is 1942200969, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-06-29.