Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Karen Elizabeth Allen, O.D.

Q: What is the NPI number for Karen Allen?

The National Provider Identifier (NPI) for Karen Allen is 1841228111, a Type 1 (individual) record in the CMS NPPES registry.

Optometrist in Carrollton, TX · enumerated 2006.

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

National Provider Identifier

1841228111

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Registry record

Entity type Individual (Type 1)

Name Karen Elizabeth Allen

Credential O.D.

Sex Female

Practice address 3012 E Hebron Pkwy, Suite 100, Carrollton, TX, 75010

Phone (972) 307-5000

Fax (972) 307-7717

Enumeration date Jun 28, 2006

Last updated in NPPES Mar 14, 2008

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 6058TG (TX) 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 Karen Allen practice?

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

What is the NPI number for Karen Allen?

The National Provider Identifier (NPI) for Karen Allen is 1841228111, 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 2008-03-14.