Mark Lum Psychological Services
Mark Lum Psychological Services is a healthcare organization registered as Clinical Psychologist in Orange, CA, holding Type 2 (organization) NPI 1992986616 since 2007. The authorized official on file is Mark Lum, Licensed Psychologist.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1992986616 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Mark Lum Psychological Services |
| Practice address | 1801 E HEIM AVE, SUITE 204, Orange, CA, 92865 |
| Phone | 7142829713 |
| Fax | 7142828016 |
| Enumeration date | 2007-11-21 |
| Last updated in NPPES | 2007-11-21 |
Authorized official
| Name | Mark Lum |
|---|---|
| Title | Licensed Psychologist |
| Phone | 9497139846 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103TC0700X | Clinical Psychologist | Primary | PSY13344 | CA |
Copy-ready billing details
Provider: Mark Lum Psychological Services NPI: 1992986616 Taxonomy: 103TC0700X (Clinical Psychologist) Address: 1801 E HEIM AVE, SUITE 204, Orange, CA, 92865
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1083648752 | Mark Lum | Individual | Clinical Psychologist | Orange, CA |
| 1558685859 | Thomas Lester | Individual | Psychiatry Physician | Orange, CA |
Verify this record
Cross-check NPI 1992986616 against the authoritative CMS record: view Mark Lum Psychological Services 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
What is a Type 2 NPI?
What type of organization is Mark Lum Psychological Services?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-11-21.