TIMOTHY JAMES JOOS MD
NPI 1740265735
Internal Medicine in Seattle, WA
About Timothy James Joos Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TIMOTHY JAMES JOOS MD (NPI 1740265735) is an individual internal medicine provider in Seattle, Washington, licensed in Washington (MD00043045) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS and is a graduate of University Of Minnesota Medical School (1993).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 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 and accepts Medicare assignment
Timothy James Joos 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 Reassignment
Medicare enrollment records show Timothy Joos reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Seattle, WA 98144
- Reassigned Medicare billing, Washington enrollment
- 292 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 2
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98118 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 4
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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 98118
SEATTLE, WA 98118
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 Joos's NPI number?
The NPI number for Timothy Joos is 1740265735. It was assigned to this individual provider in the NPPES registry on December 13, 2005.
Where is Timothy Joos located?
Timothy Joos practices at 4400 37th Ave S, Seattle, WA 98118. The listed phone number is (206) 461-6957.
What is Timothy Joos's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Timothy Joos enrolled in Medicare?
Yes. Timothy Joos 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 organization bills Medicare for Timothy Joos's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Joos reassigns Medicare benefits to Neighborcare Health (Seattle, 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 Timothy Joos's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Timothy Joos accept?
Health plans from Premera Blue Cross Blue Shield of Alaska list Timothy Joos 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 Timothy Joos was last updated on November 3, 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.
# Timothy James Joos, MD · NPI 1740265735
Internal Medicine physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since December 13, 2005.
## Identity
- **NPI:** 1740265735 (Entity type: Individual)
- **Enumerated:** December 13, 2005
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** MD00043045 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 4400 37TH AVE S, Seattle, WA 98118-1609
- **Phone:** (206) 461-6957 · **Fax:** (206) 461-7810
## 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:** Neighborcare Health (NPI 1578593562, Seattle, WA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Minnesota Medical School, class of 1993
## Record status
- **NPPES last updated:** November 3, 2011
- **Other identifiers:** Medicaid 8438483 (WA); Medicare UPIN H37546
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Source: [NPI Profile](https://npiprofile.com/npi/1740265735) · Data from the CMS NPPES public registry.