Zheng Topp, M.D. appears in the CMS NPPES registry as a Hematology & Oncology Physician provider holding M.D. credentials at 9135 SW BARNES RD STE 261, Portland, OR, 97225, with a listed phone of (503) 216-6300. NPI 1023212784 was issued on 06/14/2007.

Medicare Part D records for calendar year 2023 show 1,376 prescription claims written by this provider, covering 311 Medicare beneficiaries and totaling roughly $1.5 million in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 5.2%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 79.1/100 for the 2023 performance year (Quality 83.9, Cost 42.9), compared with the national average of 83.1.

Hematology & Oncology Physician is a mid-sized specialty nationwide, with 11,215 enrolled providers across 54 states and an average of 847 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.

Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.