Dr. Mark David Libon, PH.D.
Dr. Mark David Libon is a Mental Health Counselor provider (Counselor) practicing in Salem, MA, registered in the NPPES registry with NPI 1023036878 since 2006. The credential PHD stands for Doctor of Philosophy.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1023036878 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Mark David Libon |
| Credential | PH.D. |
| Sex | Male |
| Practice address | 70 WASHINGTON ST STE 316, Salem, MA, 01970 |
| Phone | 7819103440 |
| Enumeration date | 2006-07-18 |
| Last updated in NPPES | 2016-12-27 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 101YA0400X | Addiction (Substance Use Disorder) Counselor | Secondary | 902 | MA |
| 101YM0800X | Mental Health Counselor | Primary | 3044 | MA |
| 106H00000X | Marriage & Family Therapist | Secondary | 832 | MA |
PHD — Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential
Copy-ready billing details
Provider: Mark Libon, PH.D. NPI: 1023036878 Taxonomy: 101YM0800X (Mental Health Counselor) Address: 70 WASHINGTON ST STE 316, Salem, MA, 01970
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Cross-check NPI 1023036878 against the authoritative CMS record: view Dr. Mark David Libon 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.
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2016-12-27.