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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Karen Carter Lyon, PHD RN CNS

Medical-Surgical Clinical Nurse Specialist in Tomball, TX · enumerated 2005.

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

National Provider Identifier

1538153945

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Registry record

Entity type Individual (Type 1)
Name Karen Carter Lyon
Credential PHD RN CNS
Sex Female
Practice address Tomball, TX, 77375
Phone (281) 401-7943
Enumeration date Aug 31, 2005
Last updated in NPPES Oct 29, 2010

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

364SM0705X Medical-Surgical Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 232773 (TX) Primary

Other identifiers

Identifier Type State Issuer
089369501 Medicaid TX -
Q3561 Medicaid NM -

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

Where does Karen Lyon practice?
The practice location on file with NPPES is in Tomball, TX. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Karen Lyon?
The National Provider Identifier (NPI) for Karen Lyon is 1538153945, 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 2010-10-29.