SARA JO GRETHLEIN MD
NPI 1326083445
Internal Medicine - Hematology & Oncology in Seattle, WA
About Sara Jo Grethlein Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SARA JO GRETHLEIN MD (NPI 1326083445) is an individual hematology & oncology provider in Seattle, Washington, licensed in Washington (MD.MD.61107310) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS, is affiliated with Swedish Medical Center, and maintains a secondary practice location in Sunnyside.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Secondary Practice Location 1
Other Identifiers 3
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
Sara Jo Grethlein 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 Sara Grethlein reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Ketchikan, AK 99901
- Reassigned Medicare billing, Alaska enrollment
- 156 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Swedish Medical Center
Acute Care Hospitals · Seattle, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98104 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare 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.
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 98104
SEATTLE, WA 98104
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 Sara Grethlein's NPI number?
The NPI number for Sara Grethlein is 1326083445. It was assigned to this individual provider in the NPPES registry on June 20, 2006. The provider is also known as Sara J Friedman.
Where is Sara Grethlein located?
Sara Grethlein practices at 1221 Madison St 2nd Fl, Seattle, WA 98104. The listed phone number is (206) 386-2323.
What is Sara Grethlein's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Sara Grethlein enrolled in Medicare?
Yes. Sara Grethlein 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 Sara Grethlein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sara Grethlein reassigns Medicare benefits to Peacehealth (Ketchikan, AK). 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 Sara Grethlein's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Sara Grethlein accept?
Health plans from Moda Health Plan, Inc. and Premera Blue Cross Blue Shield of Alaska list Sara Grethlein 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 Sara Grethlein affiliated with any hospitals?
According to CMS data, Sara Grethlein is affiliated with Swedish Medical Center.
When was this NPI record last updated?
The NPPES record for Sara Grethlein was last updated on October 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 26 days 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.
# Sara Jo Grethlein, MD · NPI 1326083445
Hematology & Oncology physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since June 20, 2006.
## Identity
- **NPI:** 1326083445 (Entity type: Individual)
- **Enumerated:** June 20, 2006
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** MD.MD.61107310 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 1221 MADISON ST, 2ND FL, Seattle, WA 98104-3588
- **Phone:** (206) 386-2323 · **Fax:** (206) 215-6165
## 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:** Peacehealth (NPI 1801965736, Ketchikan, AK), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1988
## Record status
- **NPPES last updated:** October 16, 2026
- **Other identifiers:** Medicaid 2173421 (WA); Medicaid 01498439 (NY); Medicaid 201177200 (IN)
---
Source: [NPI Profile](https://npiprofile.com/npi/1326083445) · Data from the CMS NPPES public registry.