CATHERINE A NELSON DO
NPI 1881004042
Family Medicine in Decorah, IA
About Catherine A Nelson Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CATHERINE A NELSON DO (NPI 1881004042) is an individual family medicine provider in Decorah, Iowa, licensed in Iowa (DO-05013) and active in the NPI registry since April 2014. She is enrolled in Medicare PECOS, is affiliated with Gundersen Palmer Lutheran Hospital And Clinics, and maintains a secondary practice location in La Crosse.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
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
Catherine A Nelson Do 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 Catherine Nelson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Decorah, IA 52101
- Reassigned Medicare billing, Iowa enrollment
- 179 clinicians in this Medicare group
Decorah, IA 52101
- Reassigned Medicare billing, Iowa enrollment
- 83 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.
Areas of Expertise CMS Part B claims 42
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Gundersen Palmer Lutheran Hospital And Clinics
Critical Access Hospitals · West Union, IAVeterans Memorial Hospital
Critical Access Hospitals · Waukon, IARegional Health Services Of Howard County
Critical Access Hospitals · Cresco, IAWinnmed
Critical Access Hospitals · Decorah, IAGundersen Lutheran Medical Center
Acute Care Hospitals · La Crosse, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 52101 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
DECORAH, IA 52101
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 Catherine Nelson's NPI number?
The NPI number for Catherine Nelson is 1881004042. It was assigned to this individual provider in the NPPES registry on April 28, 2014.
Where is Catherine Nelson located?
Catherine Nelson practices at 1830 State Highway 9, Decorah, IA 52101. The listed phone number is (563) 382-3140.
What is Catherine Nelson's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Catherine Nelson enrolled in Medicare?
Yes. Catherine Nelson 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 Catherine Nelson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Catherine Nelson reassigns Medicare benefits to 2 organizations: Gundersen Clinic, Ltd. (Decorah, IA) and Gundersen Regional Clinics LLC (Decorah, 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 Catherine Nelson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Catherine Nelson accept?
Health plans from Anthem Blue Cross and Blue Shield, Aspirus Health Plan, Oscar Insurance Company, Quartz and Wellmark Health Plan of Iowa, Inc. list Catherine Nelson 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.
Is Catherine Nelson affiliated with any hospitals?
According to CMS data, Catherine Nelson is affiliated with Gundersen Palmer Lutheran Hospital And Clinics, Veterans Memorial Hospital, Regional Health Services Of Howard County, Winnmed and Gundersen Lutheran Medical Center.
When was this NPI record last updated?
The NPPES record for Catherine Nelson was last updated on July 21, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.