BLAIR B IRWIN MD
NPI 1720221153
Internal Medicine - Hematology & Oncology in Tacoma, WA
About Blair B Irwin Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
BLAIR B IRWIN MD (NPI 1720221153) is an individual hematology & oncology provider in Tacoma, Washington, licensed in Washington (MD60535985) and active in the NPI registry since April 2009. She is enrolled in Medicare PECOS, is affiliated with Multicare Auburn Medical Center, and is a graduate of Other (2009).
NPPES Registry Identity
Specialties & Licenses 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
Blair B Irwin 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 Blair Irwin reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Tacoma, WA 98405
- Reassigned Medicare billing, Washington enrollment
- 4,383 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 4
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.
Multicare Auburn Medical Center
Acute Care Hospitals · Auburn, WAMulticare Good Samaritan Hospital
Acute Care Hospitals · Puyallup, WATacoma General Allenmore Hospital
Acute Care Hospitals · Tacoma, WACapital Medical Center
Acute Care Hospitals · Olympia, WAMulticare Covington Medical Center
Acute Care Hospitals · Covington, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98405 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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Blair Irwin's NPI number?
The NPI number for Blair Irwin is 1720221153. It was assigned to this individual provider in the NPPES registry on April 15, 2009.
Where is Blair Irwin located?
Blair Irwin practices at 1003 S 5th St Fl 4, Tacoma, WA 98405. The listed phone number is (253) 403-1677.
What is Blair Irwin's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Blair Irwin enrolled in Medicare?
Yes. Blair Irwin 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 Blair Irwin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Blair Irwin reassigns Medicare benefits to Multicare Health System (Tacoma, 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 Blair Irwin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Blair Irwin accept?
Health plans from Ambetter Health and Premera Blue Cross Blue Shield of Alaska list Blair Irwin 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 Blair Irwin affiliated with any hospitals?
According to CMS data, Blair Irwin is affiliated with Multicare Auburn Medical Center, Multicare Good Samaritan Hospital, Tacoma General Allenmore Hospital, Capital Medical Center and Multicare Covington Medical Center.
When was this NPI record last updated?
The NPPES record for Blair Irwin was last updated on July 28, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Blair B Irwin, MD · NPI 1720221153
Hematology & Oncology physician in Tacoma, Washington. Individual provider, active in the CMS NPPES registry since April 15, 2009.
## Identity
- **NPI:** 1720221153 (Entity type: Individual)
- **Enumerated:** April 15, 2009
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** MD60535985 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 1003 S 5TH ST FL 4, Tacoma, WA 98405-4210
- **Phone:** (253) 403-1677
## 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:** Multicare Health System (NPI 1376597468, Tacoma, WA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2009
## Record status
- **NPPES last updated:** July 28, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1720221153) · Data from the CMS NPPES public registry.