NPI Portal NPI Lookup & Verification

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

William Louis Mulkey, MA, NCC, LPC, LPCS

Professional Counselor in Greenville, SC · enumerated 2010.

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

National Provider Identifier

1942516299

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Registry record

Entity type Individual (Type 1)
Name William Louis Mulkey
Credential MA, NCC, LPC, LPCS
Sex Male
Practice address Greenville, SC, 29607
Phone (864) 915-8726
Fax (888) 600-7749
Enumeration date Aug 25, 2010
Last updated in NPPES Jun 18, 2018

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

Taxonomy & licenses

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License 5673 (SC) Secondary
101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License 4975 (SC) Primary
LPC · Licensed Professional Counselor: A licensed mental-health counselor providing psychotherapy. About the LPC credential

Other identifiers

Identifier Type State Issuer
PC1033 Medicaid SC -
GP5592 Medicaid SC -

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

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.
What specialty is William Mulkey?
William Mulkey is registered in NPPES with the primary taxonomy of Professional Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-06-18.