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SARA J GRETHLEIN MD
NPI 1326083445
Internal Medicine - Hematology & Oncology in Seattle, WA

Active since June 20, 2006PECOS EnrolledAccepts Medicare Assignment
82.84/100
CMS Quality Rating
1221 MADISON ST, 2ND FL, SEATTLE, WA 98104(206) 386-2323(206) 215-6165 Get Directions Write a Review

NPPES record last updated: November 9, 2021. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Nov 9, 2021, Dec 31, 2020 (2 updates tracked since 2020).

About Sara J Grethlein Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SARA J GRETHLEIN MD (NPI 1326083445) is an individual hematology & oncology provider in Seattle, Washington, licensed in Washington (MD61107310) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS, is affiliated with Swedish Medical Center, and is a graduate of Other (1988).

NPPES Registry Identity

NPI1326083445
Entity TypeIndividualFemale
Primary Taxonomy207RH0003X
Provider Legal NameSARA J GRETHLEINCredential: MD
Location Address1221 MADISON ST, 2ND FLSeattle, WA 98104-3588
Mailing AddressPo Box 25608Salt Lake City, UT 84125-0608 · (206) 320-4476 · Fax (206) 568-7043
Phone(206) 386-2323
Fax(206) 215-6165
Sole ProprietorNo
Medical School CMSOtherGraduated 1988
Enumeration DateJune 20, 2006
Last NPPES UpdateNovember 9, 20212 updates tracked since enumeration
NPPES CertifiedNovember 9, 2021
✔ NPI 1326083445 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in WA · MD61107310
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Also ListedInternal Medicine · Medical OncologyTaxonomy 207RX0202X · License MD61107310 (WA)
1221 MADISON ST, Seattle, WA 98104
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Other Names 1

Former Name (1)Sara J Friedman

Other Identifiers 2

Medicaid201177200IN
Medicaid01498439NY

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Sara J 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.

PECOS PAC ID3870635857
PECOS Enrollment IDI20251220000547
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

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, WA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number500027
Location747 BroadwaySeattle, WA 98122 · King County
Emergency services Birthing friendly

Physician 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.

New Patient
$189.37 typical visit price
range $63.67 – $189.37
Typical copayment $47.34 (range $15.91 – $47.34)
Most-billed visit code 99205
Established Patient
$111.00 typical visit price
range $21.12 – $155.00
Typical copayment $27.75 (range $5.28 – $38.75)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

82.84/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality82.14
Promoting Interoperability100
Improvement Activities40
Cost60.65

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.

PET-CT IMAGING AT SWEDISH CANCER INSTITUTE LLC
Radiology (Diagnostic Radiology)
1221 MADISON ST, STE 150
SEATTLE, WA 98104
King County (206) 215-6487
JULIA CAROLYN BOKMA PARKER DNP, ARNP, BSN, OCN
Nurse Practitioner (Adult Health)
1221 MADISON ST, STE 1020
SEATTLE, WA 98104
King County (206) 215-2658
SWEDISH HEALTH SERVICES
Surgery
1221 MADISON ST, STE 1411
SEATTLE, WA 98104
King County (206) 386-6700
MARTHA A. CLAY ARNP
Nurse Practitioner (Adult Health)
1221 MADISON ST, SUITE 400
SEATTLE, WA 98104
King County (206) 215-6400
SWATHI NAMBURI MD
Internal Medicine (Hematology & Oncology)
1221 MADISON ST, STE 1020
SEATTLE, WA 98104
King County (206) 215-2658
DR. MARC HORTON MD
Surgery
1221 MADISON ST
SEATTLE, WA 98104
King County (206) 386-6700
LASER VISION CENTERS, INC.
Clinic/Center
1221 MADISON ST, STE. 690
SEATTLE, WA 98104
King County (206) 215-3555
JILL RENDER M.D.
Pediatrics
1221 MADISON ST, SUITE 910
SEATTLE, WA 98104
King County (206) 329-1760

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.

What insurance does Sara Grethlein accept?

Health plans from CareSource 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 November 9, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.