​Thank you for your inquiry specific to CMS22v12: Preventive Care and Screening: Screening for High Blood Pressure and Follow-Up Documented. Patients in the denominator are identified via the Encounter to screen for blood pressure value set (2.16.840.1.113883.3.600.1920). If the pre- or post-surgical evaluation is tied to one of the encounter codes contained in that value set, then the documented blood pressure would be counted toward the numerator. You can reference the applicable codes containing these value sets on the Value Set Authority Center (VSAC) at https://vsac.nlm.nih.gov/ . Click on the “Search Value Sets” tab and enter the value set ID to review codes included in the respective value set.