MRS. MARISSA MARIE LARSON LISW
NPI 1235842626
Social Worker - Clinical in Clarion, IA
About Mrs. Marissa Marie Larson Lisw NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. MARISSA MARIE LARSON LISW (NPI 1235842626) is an individual clinical provider in Clarion, Iowa and active in the NPI registry since December 2022. She is enrolled in Medicare PECOS and is a graduate of Other (2022).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mrs. Marissa Marie Larson Lisw is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Marissa Larson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Clarion, IA 50525
- Reassigned Medicare billing, Iowa enrollment
- 166 clinicians in this Medicare group
Belmond, IA 50421
- Reassigned Medicare billing, Iowa enrollment
- 164 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 50525 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CLARION, IA 50525
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Marissa Larson's NPI number?
The NPI number for Marissa Larson is 1235842626. It was assigned to this individual provider in the NPPES registry on December 30, 2022.
Where is Marissa Larson located?
Marissa Larson practices at 1316 S Main St, Clarion, IA 50525. The listed phone number is (515) 532-2811.
What is Marissa Larson's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Marissa Larson enrolled in Medicare?
Yes. Marissa Larson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Marissa Larson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marissa Larson reassigns Medicare benefits to 2 organizations: Iowa Specialty Hospital- Clarion (Clarion, IA) and Belmond Community Hospital (Belmond, IA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marissa Larson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Marissa Larson accept?
Health plans from Oscar Insurance Company and Wellmark Health Plan of Iowa, Inc. list Marissa Larson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Marissa Larson was last updated on September 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mrs. Marissa Marie Larson, LISW · NPI 1235842626
Clinical provider in Clarion, Iowa. Individual provider, active in the CMS NPPES registry since December 30, 2022.
## Identity
- **NPI:** 1235842626 (Entity type: Individual)
- **Enumerated:** December 30, 2022
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **Sole proprietor:** No
## Practice location
- **Address:** 1316 S MAIN ST, Clarion, IA 50525-2019
- **Phone:** (515) 532-2811
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Iowa Specialty Hospital- Clarion (NPI 1396760153, Clarion, IA); Belmond Community Hospital (NPI 1821122623, Belmond, IA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** September 2, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1235842626) · Data from the CMS NPPES public registry.