NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Karen Ann Gust, OD

Optometrist in Allison Park, PA · enumerated 2006 · practices at Bittner Vision Associates.

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

National Provider Identifier

1427117662

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Karen Ann Gust
Credential OD
Sex Female
Practice address 2384 Ferguson Rd, Allison Park, PA, 15101
Fax (412) 486-5619
Enumeration date Dec 6, 2006
Last updated in NPPES Nov 7, 2012

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License OEG000710 (PA) Primary
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier Type State Issuer
368587 Other PA HIGHMARK BLUE CROSS
410049150 Other PA RAILROAD MEDICARE

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

What specialty is Karen Gust?
Karen Gust is registered in NPPES with the primary taxonomy of Optometrist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-11-07.