Diane Tseng, MD,PHD
Medical Oncology Physician · Seattle, WA
Diane Tseng, MD,PHD is a medical oncology physician with a practice address in Seattle, Washington, and NPI 1164862785, issued on Jun 27, 2013. Check the license (Washington MD61038846, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Diane Tseng
- Credential
- MD,PHD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- MD61038846 WA
Self-reported in NPPES; status is on the state search - Practice location
- 825 Eastlake Ave E, Seattle, WA 98109
- Phone
- (206) 520-5000
- Enumerated
- Jun 27, 2013
- Record last updated
- Jun 10, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 1164862785 WA
- Medicare enrollment
- Enrolled (PECOS I20200617001777); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 183 in Washington → Look up another NPI →
Also registered at 825 Eastlake Ave E
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Diane Tseng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD61038846Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average medical oncology physician in 2024
130 Medicare Part D claims for 33 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 32% of claims. 13 claims were for opioids.
Most prescribed
- Prochlorperazine Maleate20 claims
- Dexamethasone15 claims
- Oxycodone Hcl12 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.
The MIPS final score for 2023 (Medicare payment program): 93.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- The Association OF University PhysiciansSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Diane Tseng among 183 medical oncology physician records in Washington
Diane Tseng, MD,PHD is one of 183 medical oncology physician records with a practice address in Washington. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 92% of them.
- NPI issued2013 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2013 · median 1998 among the 112 with a school on file
- Record last updated2020 · 70% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in Washington
There are 183 medical oncology physician records in Washington.
All 183 in Washington → Every provider in Seattle → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Shailender Bhatia, MDSeattle, WA 981091225041791
- Ellen Chuang, MDSeattle, WA 981091417044512
- Keith Eaton, MDSeattle, WA 981091982784955
- Vijayakrishna Gadi, M.D. PHDSeattle, WA 981091053358671
- Bernardo Goulart, MD, MSSeattle, WA 981091184734501
- Edward Lin, MDSeattle, WA 981091760496996
- Gary Lyman, MDSeattle, WA 981091770503054
- Thomas Lynch, MDSeattle, WA 981091780666131
Common questions
What is Diane Tseng, MD,PHD's NPI number?
Diane Tseng, MD,PHD's National Provider Identifier (NPI) is 1164862785, issued on Jun 27, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Diane Tseng, MD,PHD located?
The NPPES record lists a practice address at 825 Eastlake Ave E, Seattle, WA, 98109. Phone: (206) 520-5000. Providers update this record themselves, so call before visiting.
How can I verify Diane Tseng, MD,PHD's license?
NPPES lists Washington license number MD61038846, 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 Diane Tseng, MD,PHD prescribe under Medicare Part D?
In 2024, Diane Tseng, MD,PHD had 130 Medicare Part D claims for 33 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
What is Diane Tseng, MD,PHD's MIPS final score?
The 2023 MIPS final score is 93.1 of 100. 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.