Louis Knaapen
NPI 1417445446 · Marriage & Family Therapist · Chatsworth, CA
Louis Knaapen is a Marriage & Family Therapist provider in Chatsworth, CA (NPI 1417445446).
Provider details
- NPI number
- 1417445446
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
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
8 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2018-04-25
- Last updated
- 2018-04-25
Frequently asked questions
- What is Louis Knaapen's NPI number?
- Louis Knaapen's National Provider Identifier (NPI) is 1417445446, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Louis Knaapen's specialty?
- Louis Knaapen is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Louis Knaapen located?
- Louis Knaapen's practice location on file with NPPES is 21000 Plummer St, Chatsworth, CA 91311-4903.
- What is Louis Knaapen's phone number?
- The practice phone number listed in the NPPES registry for Louis Knaapen is (818) 882-6400.
- Is Louis Knaapen's NPI active?
- Yes — Louis Knaapen's NPI (1417445446) is active in the NPPES registry as of the last update on 2018-04-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.