CRISTINA WHEELER CASTILLO-NELSON MD
NPI 1922495456
Family Medicine in Ashland, WI
About Cristina Wheeler Castillo-nelson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CRISTINA WHEELER CASTILLO-NELSON MD (NPI 1922495456) is an individual family medicine provider in Ashland, Wisconsin, licensed in Minnesota (61012) and active in the NPI registry since April 2015. She is enrolled in Medicare PECOS, is affiliated with St Lukes Hospital, and is a graduate of University Of California, Irvine, California College Of Medicine (2015).
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
Cristina Wheeler Castillo-nelson Md 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
5Medicare enrollment records show Cristina Castillo-nelson reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Ashland, WI 54806
- Reassigned Medicare billing, Wisconsin enrollment
- 76 clinicians in this Medicare group
Ashland, WI 54806
- Reassigned Medicare billing, Wisconsin enrollment
- 118 clinicians in this Medicare group
Ashland, WI 54806
- Reassigned Medicare billing, Wisconsin enrollment
- 175 clinicians in this Medicare group
Hayward, WI 54843
- Reassigned Medicare billing, Wisconsin enrollment
- 104 clinicians in this Medicare group
Grand Rapids, MN 55744
- Reassigned Medicare billing, Minnesota enrollment
- 555 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 19
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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
St Lukes Hospital
Acute Care Hospitals · Duluth, MNAspirus Wausau Hospital
Acute Care Hospitals · Wausau, WITamarack Health Hayward Medical Center
Critical Access Hospitals · Hayward, WITamarack Health Ashland Medical Center
Critical Access Hospitals · Ashland, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 54806 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 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Cristina Castillo-nelson's NPI number?
The NPI number for Cristina Castillo-nelson is 1922495456. It was assigned to this individual provider in the NPPES registry on April 22, 2015.
Where is Cristina Castillo-nelson located?
Cristina Castillo-nelson practices at 2201 Lake Shore Dr E, Ashland, WI 54806. The listed phone number is (218) 249-5555.
What is Cristina Castillo-nelson's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Cristina Castillo-nelson enrolled in Medicare?
Yes. Cristina Castillo-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 Cristina Castillo-nelson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Cristina Castillo-nelson reassigns Medicare benefits to 5 organizations: St. Luke's Hospital Of Duluth (Ashland, WI), The Lakes Community Health Center, Inc (Ashland, WI), Memorial Medical Center Inc (Ashland, WI), Medical Services, Inc (Hayward, WI) and Grand Itasca Clinic And Hospital (Grand Rapids, MN). 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 Cristina Castillo-nelson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Cristina Castillo-nelson accept?
Health plans from CareSource (Common Ground Healthcare), Security Health Plan and UnitedHealthcare list Cristina Castillo-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 Cristina Castillo-nelson affiliated with any hospitals?
According to CMS data, Cristina Castillo-nelson is affiliated with St Lukes Hospital, Aspirus Wausau Hospital, Tamarack Health Hayward Medical Center and Tamarack Health Ashland Medical Center.
When was this NPI record last updated?
The NPPES record for Cristina Castillo-nelson was last updated on February 4, 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.