PRINCIPAL CARE CPT CODE – 99426 is Billed to the Patient when the Clinical staff members, directed by a physician or other qualified healthcare professional, perform management and care plan services for a patient with a complex chronic condition expected to last three months, which places the Patient at significant risk of hospitalization, acute exacerbation, decompensation, functional decline, or death. Use this code for the first 30 minutes of clinical staff time per calendar month.