Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Abigail Christine Gillogly Harsch, O.D.

Corneal and Contact Management Optometrist in Tahlequah, OK · enumerated 2015 · practices at Northeastern State University College of Optometry.

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

National Provider Identifier

1649655549

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Registry record

Entity type Individual (Type 1)

Name Abigail Christine Gillogly Harsch

Credential O.D.

Sex Female

Practice address 1001 N Grand Ave, Northeastern State University Oklahoma College of Optom, Tahlequah, OK, 74464

Phone (918) 444-4031

Enumeration date Jul 21, 2015

Last updated in NPPES Jul 21, 2015

Taxonomy & licenses

152WC0802X Corneal and Contact Management Optometrist Eye and Vision Services Providers · License 2850 (OK) Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Abigail Gillogly Harsch practice?

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

What is the NPI number for Abigail Gillogly Harsch?

The National Provider Identifier (NPI) for Abigail Gillogly Harsch is 1649655549, 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 2015-07-21.