DR. TIMOTHY LEIGH LARSON MD
NPI 1679500433
Radiology - Neuroradiology in Lynnwood, WA
About Dr. Timothy Leigh Larson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. TIMOTHY LEIGH LARSON MD (NPI 1679500433) is an individual neuroradiology provider in Lynnwood, Washington, licensed in Washington (MD00024859) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Providence Regional Medical Center Everett, and is a graduate of University Of Washington School Of Medicine (1983).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 7
Accepted Insurance
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. Timothy Leigh Larson 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
12Medicare enrollment records show Timothy Larson reassigns Medicare billing to 12 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Lynnwood, WA 98036
- Reassigned Medicare billing, Washington enrollment
- 209 clinicians in this Medicare group
Edmonds, WA 98026
- Reassigned Medicare billing, Washington enrollment
- 200 clinicians in this Medicare group
Everett, WA 98208
- Reassigned Medicare billing, Washington enrollment
- 194 clinicians in this Medicare group
Kirkland, WA 98034
- Reassigned Medicare billing, Washington enrollment
- 196 clinicians in this Medicare group
Everett, WA 98201
- Reassigned Medicare billing, Washington enrollment
- 1,285 clinicians in this Medicare group
Seattle, WA 98101
- Reassigned Medicare billing, Washington enrollment
- 663 clinicians in this Medicare group
Seattle, WA 98104
- Reassigned Medicare billing, Washington enrollment
- 204 clinicians in this Medicare group
Seattle, WA 98104
- Reassigned Medicare billing, Washington enrollment
- 18 clinicians in this Medicare group
Seattle, WA 98104
- Reassigned Medicare billing, Washington enrollment
- 1,270 clinicians in this Medicare group
Olympia, WA 98506
- Reassigned Medicare billing, Washington enrollment
- 186 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 20
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Providence Regional Medical Center Everett
Acute Care Hospitals · Everett, WAProvidence Centralia Hospital
Acute Care Hospitals · Centralia, WAProvidence St Peter Hospital
Acute Care Hospitals · Olympia, WAOverlake Hospital Medical Center
Acute Care Hospitals · Bellevue, WAArbor Health Morton Hospital
Critical Access Hospitals · Morton, WAMedicare 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.
Reported Quality Measures
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.
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
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 Timothy Larson's NPI number?
The NPI number for Timothy Larson is 1679500433. It was assigned to this individual provider in the NPPES registry on June 27, 2006.
Where is Timothy Larson located?
Timothy Larson practices at 19020 33rd Ave W Ste 210, Lynnwood, WA 98036. The listed phone number is (425) 563-1500.
What is Timothy Larson's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Neuroradiology, with taxonomy code 2085N0700X.
Is Timothy Larson enrolled in Medicare?
Yes. Timothy Larson 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 Timothy Larson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Larson reassigns Medicare benefits to 12 organizations: Radia Inc P S (Lynnwood, WA), Swedish Radia Imaging Center At Edmonds LLC (Edmonds, WA), Swedish Health Services (Everett, WA), Evergreen Radia LLC (Kirkland, WA), Optum Care Washington PLLC (Everett, WA) and 7 more organizations, listed in the Medicare section above. 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 Timothy Larson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Timothy Larson accept?
Health plans from Premera Blue Cross Blue Shield of Alaska list Timothy Larson 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.
Is Timothy Larson affiliated with any hospitals?
According to CMS data, Timothy Larson is affiliated with Providence Regional Medical Center Everett, Providence Centralia Hospital, Providence St Peter Hospital, Overlake Hospital Medical Center and Arbor Health Morton Hospital.
When was this NPI record last updated?
The NPPES record for Timothy Larson was last updated on March 29, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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. Timothy Leigh Larson, MD · NPI 1679500433
Neuroradiology physician in Lynnwood, Washington. Individual provider, active in the CMS NPPES registry since June 27, 2006.
## Identity
- **NPI:** 1679500433 (Entity type: Individual)
- **Enumerated:** June 27, 2006
- **Primary specialty:** Radiology - Neuroradiology · taxonomy 2085N0700X
- **State license:** MD00024859 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 19020 33RD AVE W STE 210, Lynnwood, WA 98036-4748
- **Phone:** (425) 563-1500 · **Fax:** (425) 563-1501
## 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:** 12 organizations under Medicare reassignment (form CMS-855R): Radia Inc P S (NPI 1700045572, Lynnwood, WA); Swedish Radia Imaging Center At Edmonds LLC (NPI 1164494373, Edmonds, WA); Swedish Health Services (NPI 1114356904, Everett, WA); Evergreen Radia LLC (NPI 1922095694, Kirkland, WA); Optum Care Washington PLLC (NPI 1831186766, Everett, WA); and 7 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Washington School Of Medicine, class of 1983
## Record status
- **NPPES last updated:** March 29, 2019
- **Other identifiers:** Other 0369898 (WA); Other 0384450 (WA); Other 0369895 (WA); and 4 more
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Source: [NPI Profile](https://npiprofile.com/npi/1679500433) · Data from the CMS NPPES public registry.