This case study uses Virginia APCD data to develop and validate a decision tree classifier for identifying primary care clinicians in claims data, finding over 89% accuracy across clinician types and revealing that nurse practitioners surpassed family physicians as the most common primary care clinician type in Virginia by 2023, with advanced practice clinicians now comprising 45% of the state's primary care workforce.
Case Study Link: Reclassifying Primary Care: A Decision Tree Approach to Improving Workforce Estimates and Research Using Claims Data