DR. NATHANIEL WISE CLARK DO
NPI 1144291360
Emergency Medicine - Emergency Medical Services in Seattle, WA
About Dr. Nathaniel Wise Clark Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. NATHANIEL WISE CLARK DO (NPI 1144291360) is an individual emergency medical services provider in Seattle, Washington, licensed in Washington (OP00002070) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS, is affiliated with Kaiser Permanente Central Hospital, and is a graduate of Other (2004).
NPPES Registry Identity
Specialties & Licenses
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. Nathaniel Wise Clark 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
3Medicare enrollment records show Nathaniel Clark reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Seattle, WA 98122
- Reassigned Medicare billing, Washington enrollment
- 59 clinicians in this Medicare group
Seattle, WA 98109
- Reassigned Medicare billing, Washington enrollment
- 2,678 clinicians in this Medicare group
Redmond, WA 98052
- Reassigned Medicare billing, Washington enrollment
- 101 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Kaiser Permanente Central Hospital
Acute Care Hospitals · Seattle, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98112 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.
SEATTLE, WA 98112
SEATTLE, WA 98112
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 Nathaniel Clark's NPI number?
The NPI number for Nathaniel Clark is 1144291360. It was assigned to this individual provider in the NPPES registry on January 27, 2006.
Where is Nathaniel Clark located?
Nathaniel Clark practices at 201 16th Ave E, Seattle, WA 98112. The listed phone number is (206) 326-3000.
What is Nathaniel Clark's specialty?
The primary specialty registered for this NPI is Emergency Medicine, specializing in Emergency Medical Services, with taxonomy code 207PE0004X.
Is Nathaniel Clark enrolled in Medicare?
Yes. Nathaniel Clark 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 Nathaniel Clark's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nathaniel Clark reassigns Medicare benefits to 3 organizations: Seattle Emergency Physicians Services Inc Ps (Seattle, WA), Kaiser Foundation Health Plan Of Washington (Seattle, WA) and Eastside Emergency Physicians, PLLC (Redmond, 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 Nathaniel Clark's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Nathaniel Clark affiliated with any hospitals?
According to CMS data, Nathaniel Clark is affiliated with Kaiser Permanente Central Hospital.
When was this NPI record last updated?
The NPPES record for Nathaniel Clark was last updated on March 31, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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. Nathaniel Wise Clark, DO · NPI 1144291360
Emergency Medical Services physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since January 27, 2006.
## Identity
- **NPI:** 1144291360 (Entity type: Individual)
- **Enumerated:** January 27, 2006
- **Primary specialty:** Emergency Medicine - Emergency Medical Services · taxonomy 207PE0004X
- **State license:** OP00002070 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 201 16TH AVE E, Seattle, WA 98112-5226
- **Phone:** (206) 326-3000 · **Fax:** (206) 326-2785
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Seattle Emergency Physicians Services Inc Ps (NPI 1376642298, Seattle, WA); Kaiser Foundation Health Plan Of Washington (NPI 1396810701, Seattle, WA); Eastside Emergency Physicians, PLLC (NPI 1710288758, Redmond, WA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2004
## Record status
- **NPPES last updated:** March 31, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1144291360) · Data from the CMS NPPES public registry.