Mark Lum Psychological Services
NPI 1992986616 · Clinical Psychologist · Orange, CA
Mark Lum Psychological Services is a Clinical Psychologist organization in Orange, CA (NPI 1992986616).
Provider details
- NPI number
- 1992986616
- Entity type
- Organization
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- Mark Lum, Licensed Psychologist(949) 713-9846
- License
- PSY13344 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-11-21
- Last updated
- 2007-11-21
Frequently asked questions
- What is Mark Lum Psychological Services's NPI number?
- Mark Lum Psychological Services's National Provider Identifier (NPI) is 1992986616, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mark Lum Psychological Services?
- Mark Lum Psychological Services is classified in the NPPES registry as Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Mark Lum Psychological Services located?
- Mark Lum Psychological Services's practice location on file with NPPES is 1801 E Heim Ave, Orange, CA 92865-3020.
- What is Mark Lum Psychological Services's phone number?
- The practice phone number listed in the NPPES registry for Mark Lum Psychological Services is (714) 282-9713.
- Who is the authorized official for Mark Lum Psychological Services?
- The authorized official listed on Mark Lum Psychological Services's NPPES record is Mark Lum, Licensed Psychologist. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mark Lum Psychological Services's NPI active?
- Yes — Mark Lum Psychological Services's NPI (1992986616) is active in the NPPES registry as of the last update on 2007-11-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.