Marissa Larson, LISW
NPI 1235842626 · Clinical Social Worker · Clarion, IA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marissa Larson, LISW is a Clinical Social Worker provider in Clarion, IA (NPI 1235842626).
Provider details
- NPI number
- 1235842626
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LISW
- Sex
- Female
- 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
3 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
- 2022-12-30
- Last updated
- 2025-09-02
- Certified
- 2025-09-02
Frequently asked questions
- What is Marissa Larson's NPI number?
- Marissa Larson's National Provider Identifier (NPI) is 1235842626, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Larson's specialty?
- Marissa Larson is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Marissa Larson located?
- Marissa Larson's practice location on file with NPPES is 1316 S Main St, Clarion, IA 50525-2019.
- What is Marissa Larson's phone number?
- The practice phone number listed in the NPPES registry for Marissa Larson is (515) 532-2811.
- Does Marissa Larson accept Medicare?
- Marissa Larson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marissa Larson's NPI active?
- Yes — Marissa Larson's NPI (1235842626) is active in the NPPES registry as of the last update on 2025-09-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.