Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark A Williams, CADC III/LPC
Mental Health Counselor in Bend, OR · enumerated 2010.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1598065807
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Registry record
Entity type Individual (Type 1)
Name Mark A Williams
Credential CADC III/LPC
Sex Male
Practice address 548 Sw 13th St, Bend, OR, 97702
Phone (541) 388-8459
Enumeration date Nov 2, 2010
Last updated in NPPES Dec 6, 2022
Taxonomy & licenses
101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 11-06-113 (OR) Secondary
LPC · Licensed Professional Counselor: A licensed mental-health counselor providing psychotherapy.
About the LPC credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 500738403 | Medicaid | OR | - |
| 500738399 | Medicaid | OR | - |
| C7120 | Other | OR | OREGON LPC LISC. |
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.
Frequently asked questions
Where does Mark Williams practice?
The practice location on file with NPPES is in Bend, OR. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Williams?
The National Provider Identifier (NPI) for Mark Williams is 1598065807, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Alice Cockerill Clinical Social Worker · Bend, OR NPI 1578634028 Melinda Halpern Mental Health Counselor · Bend, OR NPI 1609925171 D'Arcy Swanson Inc. Mental Health Counselor · Bend, OR NPI 1447429188 Gayle Dosher Marriage & Family Therapist · Bend, OR NPI 1396915252 David Stetson Lcsw Inc. Community/Behavioral Health Agency · Bend, OR NPI 1891034880 Katherine Amman Clinical Social Worker · Bend, OR NPI 1457728073 Rebekah Favia Mental Health Counselor · Bend, OR NPI 1831562289 Jarret Avery Mental Health Counselor · Bend, OR NPI 1063908051
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-12-06.