Dennis Cassan, LCSW
NPI 1154425270 · Clinical Social Worker · Laguna Niguel, CA
Dennis Cassan, LCSW is a Clinical Social Worker provider in Laguna Niguel, CA (NPI 1154425270).
Provider details
- NPI number
- 1154425270
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- 16049 (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
19 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
- 2006-09-11
- Last updated
- 2015-09-07
Frequently asked questions
- What is Dennis Cassan's NPI number?
- Dennis Cassan's National Provider Identifier (NPI) is 1154425270, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dennis Cassan's specialty?
- Dennis Cassan is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Dennis Cassan located?
- Dennis Cassan's practice location on file with NPPES is 30011 Ivy Glenn Dr 206, Laguna Niguel, CA 92677-5017.
- What is Dennis Cassan's phone number?
- The practice phone number listed in the NPPES registry for Dennis Cassan is (310) 968-0245.
- Is Dennis Cassan's NPI active?
- Yes — Dennis Cassan's NPI (1154425270) is active in the NPPES registry as of the last update on 2015-09-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.