DR. CLAYTON JOHN SONTHEIMER M.D.
NPI 1679736649
Pediatrics - Pediatric Rheumatology in Seattle, WA
About Dr. Clayton John Sontheimer M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CLAYTON JOHN SONTHEIMER M.D. (NPI 1679736649) is an individual pediatric rheumatology provider in Seattle, Washington, licensed in Washington (60207732) and active in the NPI registry since July 2008. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
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)
Dr. Clayton John Sontheimer M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Clayton Sontheimer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Boise, ID 83712
- Reassigned Medicare billing, Idaho enrollment
- 1,312 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.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
SEATTLE, WA 98105
SEATTLE, WA 98105
SEATTLE, WA 98105
SEATTLE, WA 98105
SEATTLE, WA 98105
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 Clayton Sontheimer's NPI number?
The NPI number for Clayton Sontheimer is 1679736649. It was assigned to this individual provider in the NPPES registry on July 9, 2008.
Where is Clayton Sontheimer located?
Clayton Sontheimer practices at 4800 Sand Point Way NE Mail Stop R-5420, Seattle, WA 98105. The listed phone number is (314) 974-6773.
What is Clayton Sontheimer's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Rheumatology, with taxonomy code 2080P0216X.
Is Clayton Sontheimer enrolled in Medicare?
Yes. Clayton Sontheimer is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Clayton Sontheimer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Clayton Sontheimer reassigns Medicare benefits to St Lukes Clinic-Treasure Valley LLC (Boise, ID). The 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 Clayton Sontheimer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Clayton Sontheimer accept?
Health plans from Moda Health Plan, Inc., PacificSource Health Plans, Providence Health Plan and Select Health list Clayton Sontheimer 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 Clayton Sontheimer was last updated on May 23, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Dr. Clayton John Sontheimer, M.D. · NPI 1679736649
Pediatric Rheumatology physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since July 9, 2008.
## Identity
- **NPI:** 1679736649 (Entity type: Individual)
- **Enumerated:** July 9, 2008
- **Primary specialty:** Pediatrics - Pediatric Rheumatology · taxonomy 2080P0216X
- **State license:** 60207732 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 4800 SAND POINT WAY NE, MAIL STOP R-5420, Seattle, WA 98105
- **Phone:** (314) 974-6773
## 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:** St Lukes Clinic-Treasure Valley LLC (NPI 1326336058, Boise, ID), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** May 23, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1679736649) · Data from the CMS NPPES public registry.