ALEXANDER P KALLAS MD
NPI 1548324577
Emergency Medicine in Seattle, WA
About Alexander P Kallas Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALEXANDER P KALLAS MD (NPI 1548324577) is an individual emergency medicine provider in Seattle, Washington, licensed in Washington (MD00044113) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Silverdale, and is a graduate of Northwestern University Feinberg Medical School (1987).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 2
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
Alexander P Kallas 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
2Medicare enrollment records show Alexander Kallas reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Seattle, WA 98109
- Reassigned Medicare billing, Washington enrollment
- 2,678 clinicians in this Medicare group
Silverdale, WA 98383
- Reassigned Medicare billing, Washington enrollment
- 208 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
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 98122 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 98122
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 Alexander Kallas's NPI number?
The NPI number for Alexander Kallas is 1548324577. It was assigned to this individual provider in the NPPES registry on December 21, 2006.
Where is Alexander Kallas located?
Alexander Kallas practices at 500 17th Ave, Seattle, WA 98122. The listed phone number is (206) 320-2111.
What is Alexander Kallas's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Alexander Kallas enrolled in Medicare?
Yes. Alexander Kallas 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 Alexander Kallas's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Kallas reassigns Medicare benefits to 2 organizations: Kaiser Foundation Health Plan Of Washington (Seattle, WA) and Jefferson County Public Hospital District No 2 (Silverdale, 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 Alexander Kallas'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 Alexander Kallas was last updated on April 22, 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.
# Alexander P Kallas, MD · NPI 1548324577
Emergency Medicine physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since December 21, 2006.
## Identity
- **NPI:** 1548324577 (Entity type: Individual)
- **Enumerated:** December 21, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** MD00044113 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 500 17TH AVE, Seattle, WA 98122-5711
- **Phone:** (206) 320-2111 · **Fax:** (206) 320-3396
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Kaiser Foundation Health Plan Of Washington (NPI 1396810701, Seattle, WA); Jefferson County Public Hospital District No 2 (NPI 1467664631, Silverdale, WA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Northwestern University Feinberg Medical School, class of 1987
## Record status
- **NPPES last updated:** April 22, 2021
- **Other identifiers:** Other 0189706 (WA); Medicaid 8406688 (WA)
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Source: [NPI Profile](https://npiprofile.com/npi/1548324577) · Data from the CMS NPPES public registry.