NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Andrew Welty, LPCC-S

Professional Counselor in New Philadelphia, OH · enumerated 2007.

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

National Provider Identifier

1942320858

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Mark Andrew Welty
Credential LPCC-S
Sex Male
Practice address 204 2nd St Ne, New Philadelphia, OH, 44663
Phone (234) 801-2469
Fax (330) 364-9212
Enumeration date Apr 2, 2007
Last updated in NPPES Nov 5, 2018

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License E-0001965 (OH) Secondary
101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License E-0001965 (OH) Secondary
101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License E-0001965 (OH) Primary

Other identifiers

Identifier Type State Issuer
0156240 Medicaid OH -

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 Mark Welty?
The National Provider Identifier (NPI) for Mark Welty is 1942320858, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Welty practice?
The practice location on file with NPPES is in New Philadelphia, OH. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-11-05.