Mr. Mark Edward Holderbach, M.S.W., L.C.S.W.
Mr. Mark Edward Holderbach is a Clinical Social Worker provider (Social Worker) practicing in Gresham, OR, registered in the NPPES registry with NPI 1649397183 since 2007. The credential LCSW stands for Licensed Clinical Social Worker. Practices at Telecare Mental Health Services of Oregon, Inc. (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1649397183 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Mr. Mark Edward Holderbach |
| Credential | M.S.W., L.C.S.W. |
| Sex | Male |
| Practice address | 4101 NE DIVISION ST, Gresham, OR, 97030 |
| Phone | 5036666575 |
| Fax | 5036664047 |
| Enumeration date | 2007-03-22 |
| Last updated in NPPES | 2007-07-09 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1041C0700X | Clinical Social Worker | Primary | L3497 | OR |
LCSW — Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1041C0700X CLINICAL | Medicaid | OR | — |
Copy-ready billing details
Provider: Mark Holderbach, M.S.W., L.C.S.W. NPI: 1649397183 Taxonomy: 1041C0700X (Clinical Social Worker) Address: 4101 NE DIVISION ST, Gresham, OR, 97030
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1326041682 | Hiren Rana | Individual | Psychiatry Physician | Gresham, OR |
| 1407802341 | Laurel Sheppard | Individual | Family Nurse Practitioner | Gresham, OR |
| 1295889855 | Renee Sellman | Individual | Case Manager/Care Coordinator | Gresham, OR |
| 1174679682 | Marc Chinard | Individual | Clinical Social Worker | Gresham, OR |
| 1386767176 | Telecare Mental Health Services of Oregon, Inc. | Organization | Mental Health Clinic/Center (Including Community Mental Health Center) | Gresham, OR |
| 1013106509 | Rebecca Shower | Individual | Psychiatric/Mental Health Registered Nurse | Gresham, OR |
| 1669651576 | Amy Lucas | Individual | Specialist | Gresham, OR |
| 1467631374 | Jeff Wakeham | Individual | Specialist | Gresham, OR |
Verify this record
Cross-check NPI 1649397183 against the authoritative CMS record: view Mr. Mark Edward Holderbach 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 2007-07-09.