Measure Methodology

Chemotherapy Measure (OP-35)

The Centers for Medicare & Medicaid Services (CMS) originally developed the chemotherapy measure with the support of multidisciplinary clinical and research experts and in accordance with development guidelines. CMS convened a Technical Expert Panel (TEP) of physicians, nurses, patient advocates, and experts in quality improvement to provide input on key methodological decisions during measure development, and continue to meet with the Expert Working Group to support measure reevaluation.

Calendar Year (CY) 2020 Payment Determination Measure Methodology

  • 2018 Chemotherapy Measure Updates and Specifications Report, PDF-907 KB (09/28/18) - A report describing the background and rationale for measure development, the approach to risk model development and testing, and detailed measure specifications.
    • 2018 Chemotherapy Measure Data Dictionary, XLS-1.4 MB (04/08/19) - Contains the codes used to identify the measure denominator, exclusions, numerator, and risk factors, as well as risk adjustment model weights. Shows the assignment of ICD-9 and ICD-10 codes to condition categories (CCs) used to adjust for patient risk factors in the Chemotherapy measure.

Previous Methodology Reports

Questions and Comments

Please submit questions about the outpatient Chemotherapy measure to the Outpatient Question and Answer tool. To ensure proper handling of inquiries, please reference the hospital’s CMS Certification Number (CCN). Do NOT email your CDR or FSR nor submit patient-identifiable information (e.g., Date of Birth, Social Security Number, Health Insurance Claim Number, dates, procedure codes) to this address. Sending screenshots and/or describing a patient listed in your FSR is considered Protected Health Information (PHI).

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