NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. William Ross Ainsworth, LPC

Professional Counselor in Slippery Rock, PA · enumerated 2006 · practices at William R. Ainsworth Professional Counseling Services LLC.

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

National Provider Identifier

1629047741

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mr. William Ross Ainsworth
Credential LPC
Sex Male
Practice address 164 S Main St, Slippery Rock, PA, 16057
Phone (724) 794-1404
Fax (724) 794-1804
Enumeration date Mar 14, 2006
Last updated in NPPES Nov 17, 2014

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 2436 (PA) Secondary
101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License PC001270 (PA) Secondary
101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License PC001270 (PA) Primary
LPC · Licensed Professional Counselor: A licensed mental-health counselor providing psychotherapy. About the LPC credential

Other identifiers

Identifier Type State Issuer
001488360 Other PA HIGHMARK BLUE CROSS BLUE
1009378620001 Medicaid PA -
188688 Other PA VALUE OPTIONS AND VALUE
1009378620003 Medicaid PA -

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 William Ainsworth practice?
The practice location on file with NPPES is in Slippery Rock, PA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for William Ainsworth?
The National Provider Identifier (NPI) for William Ainsworth is 1629047741, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-11-17.