Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sherri Mcmahan, NP

Nurse Practitioner in Walhalla, SC · enumerated 2016.

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

National Provider Identifier

1669820726

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Registry record

Entity type Individual (Type 1)

Name Sherri Mcmahan

Credential NP

Sex Female

Practice address 103 Whitetail Dr, Walhalla, SC, 29691

Phone (864) 638-3444

Fax (864) 638-3445

Enumeration date May 31, 2016

Last updated in NPPES Aug 11, 2020

Taxonomy & licenses

364SF0001X Family Health Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 20167 (SC) Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 20167 (SC) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP 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

What is the NPI number for Sherri Mcmahan?

The National Provider Identifier (NPI) for Sherri Mcmahan is 1669820726, a Type 1 (individual) record in the CMS NPPES registry.

Where does Sherri Mcmahan practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-11.