Thank you for your inquiry regarding CMS996: Appropriate Treatment for ST-Segment Elevation Myocardial Infarction (STEMI) Patients in the Emergency Department (ED). The measure captures the percentage of ED encounters for patients 18 years and older with a diagnosis of STEMI that received appropriate treatment, defined as fibrinolytic therapy within 30 minutes of ED arrival, percutaneous coronary intervention (PCI) within 90 minutes of ED arrival, or discharge to acute care within 45 minutes of ED arrival. The measure excludes encounters in which a patient experienced cardiopulmonary arrest 24 hours or less before the start of the ED encounter or during the ED encounter, using the Cardiopulmonary Emergency value set (OID: 2.16.840.1.113883.3.3157.4048). Codes captured in this value set encompass cardiac arrest, cardiopulmonary resuscitation (CPR), defibrillation, respiratory arrest, or ventricular fibrillation (V-fib), ventricular tachycardia (VT), or pulseless electrical activity (PEA); or, traumatic or prolonged (>10 minutes) CPR. We can confirm that ICD-10-CM code I47.29 – Other ventricular tachycardia, is not currently included in the Cardiopulmonary Emergency value set used to trigger this denominator exclusion. Therefore, the encounter mentioned in the inquiry with the I47.29 code, would not be excluded from the measure due to the cardiopulmonary arrest exclusion criterion. A full list of codes captured in the Cardiopulmonary Emergency value set can be found in the Value Set Authority Center (VSAC) [ https://vsac.nlm.nih.gov/valueset/2.16.840.1.113883.3.3157.4048/expansion/Latest ]. Please note, you may need to create a free account to view these codes.