Mr. Mark Charles Sussman, LCSW
Mr. Mark Charles Sussman is a Clinical Social Worker provider (Social Worker) practicing in Eureka, CA, registered in the NPPES registry with NPI 1982799458 since 2006. The credential LCSW stands for Licensed Clinical Social Worker.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1982799458 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Mr. Mark Charles Sussman |
| Credential | LCSW |
| Sex | Male |
| Practice address | 720 WOOD ST, Eureka, CA, 95501 |
| Phone | 7072682990 |
| Enumeration date | 2006-10-03 |
| Last updated in NPPES | 2011-11-16 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1041C0700X | Clinical Social Worker | Primary | LCS 11461 | CA |
LCSW — Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential
Copy-ready billing details
Provider: Mark Sussman, LCSW NPI: 1982799458 Taxonomy: 1041C0700X (Clinical Social Worker) Address: 720 WOOD ST, Eureka, CA, 95501
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1922925858 | Eric Hanson | Individual | Day Training/Habilitation Specialist | Eureka, CA |
| 1558287284 | Sebastian Vaudiau | Individual | Community Health Worker | Eureka, CA |
| 1780646521 | Janese Charpentier | Individual | Psychiatric/Mental Health Nurse Practitioner | Eureka, CA |
| 1194763219 | County of Humboldt | Organization | Psychiatric Hospital Unit | Eureka, CA |
| 1407873268 | Marian Vasilevich | Individual | Marriage & Family Therapist | Eureka, CA |
| 1417971946 | Steve Roth | Individual | Clinical Psychologist | Eureka, CA |
| 1710070966 | Evelyn Doyle | Individual | Family Nurse Practitioner | Eureka, CA |
| 1336227669 | Christine Skotzko | Individual | Psychiatry Physician | Eureka, CA |
Verify this record
Cross-check NPI 1982799458 against the authoritative CMS record: view Mr. Mark Charles Sussman on the official NPPES registry .
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 or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2011-11-16.