Larissa Niessen, MS CCC-SLP/L
NPI 1780299180 · Speech-Language Pathologist · Fullerton, CA
Larissa Niessen, MS CCC-SLP/L is a Speech-Language Pathologist provider in Fullerton, CA (NPI 1780299180).
Provider details
- NPI number
- 1780299180
- Entity type
- Individual
- Primary specialty
- Speech-Language PathologistSpeech, Language and Hearing Service Providers
- Credential
- MS CCC-SLP/L
- Sex
- Female
- Sole proprietor
- Yes
- License
- 23092 (CA)
Specialties & taxonomies
Speech, Language and Hearing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 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
- 2020-09-11
- Last updated
- 2020-09-11
- Certified
- 2020-09-11
Frequently asked questions
- What is Larissa Niessen's NPI number?
- Larissa Niessen's National Provider Identifier (NPI) is 1780299180, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Larissa Niessen's specialty?
- Larissa Niessen is listed in the NPPES registry with a primary specialty of Speech-Language Pathologist (Speech, Language and Hearing Service Providers).
- Where is Larissa Niessen located?
- Larissa Niessen's practice location on file with NPPES is 1401 W Valencia Dr, Fullerton, CA 92833-3998.
- What is Larissa Niessen's phone number?
- The practice phone number listed in the NPPES registry for Larissa Niessen is (714) 447-7745.
- Is Larissa Niessen's NPI active?
- Yes — Larissa Niessen's NPI (1780299180) is active in the NPPES registry as of the last update on 2020-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.