Creating a national model to build anti-cancer stewardship and quality improvement initiatives.
Authors: Heron Bernadette B. , Geraci Mark C. , Duvel James , McClelland Samantha , Leslie Donna , LaPlant Kourtney Dianne , Tague Marshall , Ribeiro Maria J. A. 
Published: June 2024

e23219 Background: The Department of Veterans Affairs (VA) Pharmacy Benefits Management (PBM) Services created a national stewardship with focus on anti-cancer therapeutics within a disease-specific cohort. Building a model to focus on Veterans with a common malignancy is a novel approach. A toolkit was built containing resources to support initiatives to promote standardization of practice and monitor outcomes as a continual quality improvement process. This model was piloted in Veteran patients with Chronic Myeloid Leukemia (CML) since Tyrosine Kinase Inhibitors (TKIs) account for the second highest utilization among outpatient oral anti-cancer therapies in VA . Methods: Business rules identified Veterans Integrated Service Network (VISN) CML cohorts by using data and diagnostic coding (ICD-10; SNOMED CT) from the VA Electronic Health Record (EHR): primary care and hematology/oncology visits, inpatient stays, and problem lists. Medication Use Evaluations (MUEs) were developed: MUE #1: Veterans who received a drug other than imatinib as their initial VA prescription If new initiation, documented reason(s) for drug selection If continuation, prior drug therapy history MUE #2: Veterans who switched from first to second-line TKI Documented reason(s) for switch to 2L Documentation of adverse drug reaction (ADR) in the EHR. Results: 16 VISNs participated in the MUEs. Patient counts are each ~25% of the total CML cohort; ~50% of patients received imatinib 1L and have not switched to 2L. Responses for MUE #1 (N = 559) 293 (52%) continued therapy originally started outside VA with 71% of these patients (n = 208) without documentation of prior imatinib 266 (48%) newly initiated therapy with top documented reasons Intermediate/high risk scoring: 109 (41%) Reason not documented: 80 (30%) Cited FDA indication for CML without clinical justification: 35 (13%) Responses for MUE #2 (N = 576) Top documented reasons for switch from 1L to 2L therapy ADR: 325 (56%) Resistance / inadequate response: 132 (23%) Disease progression: 117 (20%) Only 59 (18%) who experienced an ADR had it documented in the EHR allergies / adverse reactions section. Conclusions: Disease-focused oncology stewardship in a national healthcare system is feasible. Imatinib remains the preferred TKI and accounts for the highest utilization. Oncology Stewardship activities based on the results include education on disease coding, an educational document on why to use imatinib in the 1L setting, and a medication safety article to emphasize documentation of ADRs. In our 1L to 2L MUE, ADRs were the most common reason for patients to be switched to 2L. Future activities include an education sheet on managing TKI ADRs and criteria for a potential treatment-free remission. Further interventions in TKI prescribing may be instituted in select sites. Following initiatives for CML, Anti-Cancer Stewardship Program will be expanded to other oncologic diseases.