DR. DUNCAN A RIDDELL M.D.
NPI 1801993829
Otolaryngology in Edmonds, WA
About Dr. Duncan A Riddell M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DUNCAN A RIDDELL M.D. (NPI 1801993829) is an individual otolaryngology provider in Edmonds, Washington, licensed in Washington (MD00029782) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Duncan A Riddell M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Duncan Riddell reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Edmonds, WA 98026
- Reassigned Medicare billing, Washington enrollment
- 589 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 98026 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.
EDMONDS, WA 98026
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 Duncan Riddell's NPI number?
The NPI number for Duncan Riddell is 1801993829. It was assigned to this individual provider in the NPPES registry on September 20, 2006.
Where is Duncan Riddell located?
Duncan Riddell practices at 21616 76th Ave W Suite 112, Edmonds, WA 98026. The listed phone number is (425) 775-6651.
What is Duncan Riddell's specialty?
The primary specialty registered for this NPI is Otolaryngology with taxonomy code 207Y00000X.
Is Duncan Riddell enrolled in Medicare?
Yes. Duncan Riddell is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Duncan Riddell's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Duncan Riddell reassigns Medicare benefits to Proliance Surgeons, Inc., P.S. (Edmonds, WA). 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 Duncan Riddell's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Duncan Riddell was last updated on October 24, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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. Duncan A Riddell, M.D. · NPI 1801993829
Otolaryngology physician in Edmonds, Washington. Individual provider, active in the CMS NPPES registry since September 20, 2006.
## Identity
- **NPI:** 1801993829 (Entity type: Individual)
- **Enumerated:** September 20, 2006
- **Primary specialty:** Otolaryngology · taxonomy 207Y00000X
- **State license:** MD00029782 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 21616 76TH AVE W, SUITE 112, Edmonds, WA 98026-7512
- **Phone:** (425) 775-6651 · **Fax:** (425) 670-6718
## 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:** Proliance Surgeons, Inc., P.S. (NPI 1770764342, Edmonds, WA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 24, 2011
- **Other identifiers:** Medicaid 1094796 (WA); Medicare UPIN F42590; Medicare PIN AB03542 (WA)
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Source: [NPI Profile](https://npiprofile.com/npi/1801993829) · Data from the CMS NPPES public registry.