Washington Medicare prescriber rankings
33,339 Washington prescribers billed $4.8 billion in Medicare Part D drugs in 2024, the 22nd largest of 56 states and territories. Opioids were 4.24 of every 100 of those claims (CMS), above the national 3.52.
- Prescribers33,339
- Part D drug cost$4.8 billion
- Average per prescriber$144,955
- Wrote an opioid (CMS)19,947 (59.84%)
- Opioid claims per 100 claims (CMS)4.24
Reading the Washington tables
Washington's 33,339 prescribers wrote 29,956,750 Part D claims in 2024, about $144,955 in drug cost per prescriber. A high total usually reflects specialty practice, such as cancer, rheumatology or HIV care, or vaccines: 1 of the 50 largest totals are mostly vaccines, which pharmacies often bill under a standing order naming one clinician. These are billing tables, not quality ratings. PlainDoctor does not rank named prescribers by opioid share; the state's opioid figures above come from CMS's own totals.
The 50 highest Part D drug-cost totals
| Prescriber (NPPES taxonomy) | Drug cost | Claims |
|---|---|---|
| 1Winnie MannSpecialistmostly vaccines, often billed by pharmacies under a standing order naming this clinician | $15.1 million | 70,272 |
| 2Richard ChengAdvanced Heart Failure and Transplant Cardiology Physician | $12.5 million | 3,153 |
| 3Peter LearyPulmonary Disease Physician | $12.1 million | 1,514 |
| 4Scott LetellierHematology & Oncology Physician | $11.3 million | 4,733 |
| 5David AboulafiaHematology & Oncology Physician | $9.8 million | 4,581 |
| 6Arvind ChaudhryHematology & Oncology Physician | $8.8 million | 2,083 |
| 7Nathanael GayHematology & Oncology Physician | $8.1 million | 2,424 |
| 8Zhiqian WangRheumatology Physician | $7.7 million | 5,353 |
| 9Jacob MathewInternal Medicine Physician | $7.7 million | 2,750 |
| 10Amelia WilliamsPhysician Assistant | $7.3 million | 819 |
| 11Katherine ReynoldsFamily Nurse Practitioner | $7.3 million | 3,335 |
| 12Tatyana SidorNurse Practitioner | $7.2 million | 4,171 |
| 13Siva MannemHematology & Oncology Physician | $7.1 million | 1,860 |
| 14Song ZhaoMedical Oncology Physician | $6.7 million | 2,684 |
| 15James ByrdRheumatology Physician | $6.5 million | 9,577 |
| 16Chanudi WeerasingheHematology (Internal Medicine) Physician | $6.4 million | 3,170 |
| 17Mervat SalehMedical Oncology Physician | $6.3 million | 2,411 |
| 18Bruce MatheyMedical Oncology Physician | $6.3 million | 3,431 |
| 19Andrew YangHematology & Oncology Physician | $6.2 million | 2,234 |
| 20Magdolna SoltiHematology & Oncology Physician | $5.9 million | 2,505 |
| 21Mario ChenalHematology & Oncology Physician | $5.9 million | 1,058 |
| 22Daniel EganHematology & Oncology Physician | $5.9 million | 1,408 |
| 23Hakan KayaMedical Oncology Physician | $5.7 million | 1,339 |
| 24Henry LiHematology & Oncology Physician | $5.7 million | 1,915 |
| 25Shana EighanPharmacist | $5.7 million | 757 |
| 26Li ZhangHematology & Oncology Physician | $5.6 million | 1,919 |
| 27Laura SatterwhitePharmacist | $5.6 million | 888 |
| 28Julie SmithHematology & Oncology Physician | $5.4 million | 2,458 |
| 29Maury BlitmanHematology & Oncology Physician | $5.4 million | 1,124 |
| 30Megan DibenedettoPharmacist | $5.4 million | 710 |
| 31Lee ChangCardiovascular Disease Physician | $5.4 million | 2,457 |
| 32Rafic FarahMedical Oncology Physician | $5.3 million | 2,105 |
| 33Yonatan BuberAdult Congenital Heart Disease Physician | $5.3 million | 785 |
| 34Michelle ZhangHematology & Oncology Physician | $5.2 million | 2,395 |
| 35Navanshu AroraMedical Oncology Physician | $5.2 million | 2,163 |
| 36Drew MurrayMedical Oncology Physician | $5.1 million | 2,162 |
| 37Peter JiangHematology & Oncology Physician | $5.0 million | 1,468 |
| 38Brett GourleyHematology & Oncology Physician | $5.0 million | 1,735 |
| 39Kiarash KojouriMedical Oncology Physician | $4.9 million | 2,006 |
| 40Keith LeungHematology & Oncology Physician | $4.9 million | 1,985 |
| 41Prakash VaradarajanHematology & Oncology Physician | $4.9 million | 1,577 |
| 42Yoshio InoueMedical Oncology Physician | $4.9 million | 1,243 |
| 43Samuel RaynerPulmonary Disease Physician | $4.9 million | 936 |
| 44David Bragin-SanchezAdvanced Heart Failure and Transplant Cardiology Physician | $4.8 million | 4,804 |
| 45Jiten PatelPulmonary Disease Physician | $4.8 million | 3,009 |
| 46Ensi VoshtinaHematology & Oncology Physician | $4.8 million | 2,101 |
| 47Amir Mehrvarz SarshekehHematology & Oncology Physician | $4.8 million | 1,353 |
| 48Joshua GrantCardiovascular Disease Physician | $4.8 million | 4,070 |
| 49Xiaowen WangHematology & Oncology Physician | $4.7 million | 1,457 |
| 50Ganesh RaghuPulmonary Disease Physician | $4.7 million | 1,885 |
Source: CMS Medicare Part D Prescribers by Provider, 2024 (data.cms.gov), matched to CMS NPPES by NPI; vaccine share from the prescriber's top drugs in the CMS by-provider-and-drug file. Specialty is the taxonomy the clinician reported to NPPES.
Common questions
How many Medicare prescribers are in Washington?
Washington has 33,339 Medicare Part D prescribers who filed 29,956,750 claims totaling $4.8 billion in drug costs.
What is the opioid prescribing rate in Washington?
Opioids were 4.24 of every 100 Medicare Part D claims written by Washington prescribers in 2024, against 3.52 nationally (CMS). 19,947 of the state's 33,335 Part D prescribers in CMS's geography file (59.84%) wrote at least one opioid.
Checking a prescriber
Open the prescriber's record for the full NPI entry and prescribing detail, then confirm the license on the state board search. The Part D file covers Medicare Part D only; commercial, Medicaid, VA and cash prescriptions are not in it.
Prescriber rankings in other states
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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 Medicare Part D data year 2024 (CMS).