OrganizationActive
Mark John Souris
NPI 1215381918 · Clinical Psychologist · Tarzana, CA
Mark John Souris is a Clinical Psychologist organization in Tarzana, CA (NPI 1215381918).
Provider details
- NPI number
- 1215381918
- Entity type
- Organization
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- Mark Souris, Owner(818) 635-9705
- License
- 14283 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(72/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 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
18757 Burbank Blvd
Suite 125
Tarzana, CA 91356-3375
Phone: (818) 635-9705
Fax: (818) 881-5504
Street-level locationGet directions
Mailing address
19701 Tuba St
Chatsworth, CA 91311-3547
Registry dates
- Enumerated
- 2016-04-19
- Last updated
- 2016-04-19
Frequently asked questions
- What is Mark John Souris's NPI number?
- Mark John Souris's National Provider Identifier (NPI) is 1215381918, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mark John Souris?
- Mark John Souris is classified in the NPPES registry as Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Mark John Souris located?
- Mark John Souris's practice location on file with NPPES is 18757 Burbank Blvd, Tarzana, CA 91356-3375.
- What is Mark John Souris's phone number?
- The practice phone number listed in the NPPES registry for Mark John Souris is (818) 635-9705.
- Who is the authorized official for Mark John Souris?
- The authorized official listed on Mark John Souris's NPPES record is Mark Souris, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mark John Souris's NPI active?
- Yes — Mark John Souris's NPI (1215381918) is active in the NPPES registry as of the last update on 2016-04-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.