DR. HOLLY J CHRISTOFERSON MD
NPI 1639280191
Family Medicine in Seattle, WA
About Dr. Holly J Christoferson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. HOLLY J CHRISTOFERSON MD (NPI 1639280191) is an individual family medicine provider in Seattle, Washington, licensed in Washington (MD00045452) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS, is affiliated with Valley Medical Center, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Other Identifiers 1
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
Dr. Holly J Christoferson 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 Holly Christoferson reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Seattle, WA 98104
- Reassigned Medicare billing, Washington enrollment
- 663 clinicians in this Medicare group
Seattle, WA 98109
- Reassigned Medicare billing, Washington enrollment
- 2,678 clinicians in this Medicare group
Seattle, WA 98144
- Reassigned Medicare billing, Washington enrollment
- Medicare enrollment name: Iora Health Washington Physicians PC
- 50 clinicians in this Medicare group
Seattle, WA 98144
- Reassigned Medicare billing, Washington enrollment
- 46 clinicians in this Medicare group
Denver, CO 80237
- Reassigned Medicare billing, Washington enrollment
- 8 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 8
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Valley Medical Center
Acute Care Hospitals · Renton, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98104 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 3
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 Holly Christoferson's NPI number?
The NPI number for Holly Christoferson is 1639280191. It was assigned to this individual provider in the NPPES registry on August 31, 2006.
Where is Holly Christoferson located?
Holly Christoferson practices at 800 5th Ave Ste 600, Seattle, WA 98104. The listed phone number is (206) 215-3354.
What is Holly Christoferson's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Holly Christoferson enrolled in Medicare?
Yes. Holly Christoferson 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 Holly Christoferson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Holly Christoferson reassigns Medicare benefits to 5 organizations: Swedish Health Services (Seattle, WA), Kaiser Foundation Health Plan Of Washington (Seattle, WA), Iora Health Washington Physicians, P.C. (Seattle, WA), Iora Senior Health, LLC (Seattle, WA) and Pro Health One Inc (Denver, CO). 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 Holly Christoferson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Holly Christoferson affiliated with any hospitals?
According to CMS data, Holly Christoferson is affiliated with Valley Medical Center.
When was this NPI record last updated?
The NPPES record for Holly Christoferson was last updated on April 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Dr. Holly J Christoferson, MD · NPI 1639280191
Family Medicine physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since August 31, 2006.
## Identity
- **NPI:** 1639280191 (Entity type: Individual)
- **Enumerated:** August 31, 2006
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** MD00045452 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 800 5TH AVE STE 600, Seattle, WA 98104-3186
- **Phone:** (206) 215-3354
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Swedish Health Services (NPI 1619680840, Seattle, WA); Kaiser Foundation Health Plan Of Washington (NPI 1396810701, Seattle, WA); Iora Health Washington Physicians, P.C. (NPI 1336658111, Seattle, WA); Iora Senior Health, LLC (NPI 1710386545, Seattle, WA); Pro Health One Inc (NPI 1053714584, Denver, CO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Washington School Of Medicine, class of 2003
## Record status
- **NPPES last updated:** April 17, 2025
- **Other identifiers:** Medicaid 1639280191 (WA)
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Source: [NPI Profile](https://npiprofile.com/npi/1639280191) · Data from the CMS NPPES public registry.