Sara J. Grethlein, MD
Hematology & Oncology Physician · Seattle, WA
Sara J. Grethlein, MD is a hematology & oncology physician with a practice address in Seattle, Washington, and NPI 1326083445, issued on Jun 20, 2006. Check the license (Washington MD61107310, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Sara J. Grethlein
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- MD61107310 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1221 Madison St, Seattle, WA 98104
- Phone
- (206) 386-2323
- Enumerated
- Jun 20, 2006
- Record last updated
- Nov 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (206) 215-6165
- Medicaid IDs
- 01498439 NY
201177200 IN - Medicare enrollment
- Enrolled (PECOS I20251220000547); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 476 in Washington → Look up another NPI →
Also registered at 1221 Madison St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- John Beatty, MDSurgery Physician1306909155
- Sandra Benitez Kruidenier, PA-CPhysician Assistant1255874079
- Richard Bensinger, M.D.Ophthalmology Physician1184666844
- Dale Bloomquist, DDSOral and Maxillofacial Surgery (Dentist)1740348705
- Martha Clay, ARNPAdult Health Nurse Practitioner1073697793
Verify Sara J. Grethlein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD61107310Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 82.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $131.57
1 payment: food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- PeacehealthKetchikan, AK
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sara J. Grethlein among 476 hematology & oncology physician records in Washington
Sara J. Grethlein, MD is one of 476 hematology & oncology physician records with a practice address in Washington. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 64% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1988 · median 2006 among the 294 with a school on file
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Washington
There are 476 hematology & oncology physician records in Washington.
All 476 in Washington → Every provider in Seattle → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Sharmila Ahmed, MDSeattle, WA 981041073512141
- Atis Barzdins, M.D.Seattle, WA 981041275640179
- Antonio Bedalov, MDSeattle, WA 981041407844467
- Virginia BroudySeattle, WA 981041194801811
- James Bryan, MDSeattle, WA 981041467440446
- Daniel Burns, MDSeattle, WA 981041689630063
- Cynthia Chua, MDSeattle, WA 981041700879582
- Sheldon Goldberg, MDSeattle, WA 981041649266321
Common questions
What is Sara J. Grethlein, MD's NPI number?
Sara J. Grethlein, MD's National Provider Identifier (NPI) is 1326083445, issued on Jun 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sara J. Grethlein, MD located?
The NPPES record lists a practice address at 1221 Madison St, Seattle, WA, 98104. Phone: (206) 386-2323. Providers update this record themselves, so call before visiting.
How can I verify Sara J. Grethlein, MD's license?
NPPES lists Washington license number MD61107310, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Sara J. Grethlein, MD's MIPS final score?
The 2023 MIPS final score is 82.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.