Katherine D. Nguyen, M.D.
Hematology & Oncology Physician · Seattle, WA
Katherine D. Nguyen, M.D. is a hematology & oncology physician with a practice address in Seattle, Washington, and NPI 1134308703, issued on Oct 30, 2007. Check the license (Washington MD60036787, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Katherine D. Nguyen
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- MD60036787 WA
A81558 CA
Self-reported in NPPES; status is on the state search - Practice location
- 201 16TH Ave E, Seattle, WA 98112
- Phone
- (206) 326-3111
- Enumerated
- Oct 30, 2007
- Record last updated
- Apr 28, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100311000699); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 2001
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 476 in Washington → Look up another NPI →
Also registered at 201 16TH Ave E
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Farangis Abab, RNHome Health Registered Nurse1639473408
- Joonis Abdulkhader, M.D.Family Medicine Physician1518154335
- Bashir Abumenjel, REGISTERED NURSEHome Health Registered Nurse1275352510
- Stephanie Abutin, ,MS, CCC-SLPSpeech-Language Pathologist1902522444
- Christopher Adrig, PA-CPhysician Assistant1184606089
- Sanjay Agarwal, MD, FCCP, FAASMSleep Medicine (Internal Medicine) Physician1477523249
Verify Katherine D. Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD60036787Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
366 Medicare Part D claims for 132 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Letrozole61 claims
- Anastrozole48 claims
- Hydroxyurea28 claims
- Omeprazole22 claims
- Ondansetron Hcl18 claims
- Tamoxifen Citrate17 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Kaiser Foundation Health Plan OF WashingtonSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine D. Nguyen among 476 hematology & oncology physician records in Washington
Katherine D. Nguyen, M.D. 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 2007, is newer than 36% of them.
- NPI issued2007 · 36% of these records are older, 54% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2001 · 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
- Ashley Aller, M.D.Seattle, WA 981121730674565
- Robert Burdick, MDSeattle, WA 981121508150111
- Eric Chen, M.D.Seattle, WA 981121235182585
- Stephen Dong, MDSeattle, WA 981121265811582
- Amir Modarressi, MDSeattle, WA 981121841223716
- Camille Puronen, MDSeattle, WA 981121346565876
- Gayatri Reddy, MDSeattle, WA 981121548334154
- Ann Von Gehr, MDSeattle, WA 981121972689495
Common questions
What is Katherine D. Nguyen, M.D.'s NPI number?
Katherine D. Nguyen, M.D.'s National Provider Identifier (NPI) is 1134308703, issued on Oct 30, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Katherine D. Nguyen, M.D. located?
The NPPES record lists a practice address at 201 16TH Ave E, Seattle, WA, 98112. Phone: (206) 326-3111. Providers update this record themselves, so call before visiting.
How can I verify Katherine D. Nguyen, M.D.'s license?
NPPES lists Washington license number MD60036787, 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.
How much does Katherine D. Nguyen, M.D. prescribe under Medicare Part D?
In 2024, Katherine D. Nguyen, M.D. had 366 Medicare Part D claims for 132 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
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.