KAREN W NILSEN MD
NPI 1427063254
Pediatrics in Tacoma, WA
About Karen W Nilsen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KAREN W NILSEN MD (NPI 1427063254) is an individual pediatrics provider in Tacoma, Washington, licensed in Washington (MD00036215) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS.
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 (PECOS)
Karen W Nilsen Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Karen Nilsen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Tacoma, WA 98405
- Reassigned Medicare billing, Washington enrollment
- 4,383 clinicians in this Medicare group
Tacoma, WA 98402
- Reassigned Medicare billing, Washington enrollment
- 98 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 98405 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.
TACOMA, WA 98405
TACOMA, WA 98405
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 Karen Nilsen's NPI number?
The NPI number for Karen Nilsen is 1427063254. It was assigned to this individual provider in the NPPES registry on July 30, 2006.
Where is Karen Nilsen located?
Karen Nilsen practices at 315 Martin Luther King Jr Way, Tacoma, WA 98405. The listed phone number is (253) 403-3602.
What is Karen Nilsen's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Karen Nilsen enrolled in Medicare?
Yes. Karen Nilsen is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Karen Nilsen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Nilsen reassigns Medicare benefits to 2 organizations: Multicare Health System (Tacoma, WA) and Community Health Care (Tacoma, WA). 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 Karen Nilsen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Karen Nilsen accept?
Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Karen Nilsen 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 Karen Nilsen was last updated on September 10, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# Karen W Nilsen, MD · NPI 1427063254
Pediatrics physician in Tacoma, Washington. Individual provider, active in the CMS NPPES registry since July 30, 2006.
## Identity
- **NPI:** 1427063254 (Entity type: Individual)
- **Enumerated:** July 30, 2006
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** MD00036215 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 315 MARTIN LUTHER KING JR WAY, Tacoma, WA 98405-4234
- **Phone:** (253) 403-3602
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Multicare Health System (NPI 1033202346, Tacoma, WA); Community Health Care (NPI 1790762755, Tacoma, WA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 10, 2010
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Source: [NPI Profile](https://npiprofile.com/npi/1427063254) · Data from the CMS NPPES public registry.