​​Thank you for your question on CMS104 (STK-2), Discharged on Antithrombotic Therapy. The forms of 81 mg aspirin that you listed do meet the intent of the valueset Antithrombotic Therapy Antiplatelet OID: 2.16.840.1.113762.1.4.1110.61 and you can map them to the codes found in the valueset (see below for 81 mg currently in the valueset).      1722689 aspirin 81 MG / calcium carbonate 777 MG Oral Tablet      1811631 aspirin 81 MG / omeprazole 40 MG Delayed Release Oral Tablet      243670 aspirin 81 MG Oral Tablet      252857 aspirin 81 MG Oral Capsule      308416 aspirin 81 MG Delayed Release Oral Tablet      318272 aspirin 81 MG Chewable Tablet   Valueset Antithrombotic Therapy Antiplatelet OID: 2.16.840.1.113762.1.4.1110.61 intent is described by its Purpose (see below):      Purpose:           Clinical Focus: The purpose of this value set is to represent concepts of medications that are antiplatelet medications used to reduce stroke mortality and morbidity.           Data Element Scope: This value set may use a model element related to Medication.           Inclusion Criteria: Includes concepts that represent a medication that is an antithrombotic medication, including oral, rectal, and injectable dose forms.           Exclusion Criteria: Excludes concepts that represent enoxaparin and heparin generally given for VTE prophylaxis.   Valueset Antithrombotic Therapy OID: 2.16.840.1.113762.1.4.1110.62 groups the following two valuesets:           Antithrombotic Therapy_Anticoagulant OID: 2.16.840.1.113883.3.117.1.7.1.201           Antithrombotic Therapy_Antiplatelet OID: 2.16.840.1.113762.1.4.1110.61 These value sets consist of RxNorm concepts that represent a dose formulation to meet intent and are designed to broadly to meet various clinical scenarios. They both have the same inclusion and exclusion criteria, that describe the intent of the dosage to be achieved.   CMS104 (STK-2) qualifies patients for the Numerator with the following valueset: Antithrombotic Therapy OID: 2.16.840.1.113762.1.4.1110.62 (see below).        Numerator           TJC."Ischemic Stroke Encounter" IschemicStrokeEncounter            with "Antithrombotic Therapy at Discharge" DischargeAntithrombotic               such that DischargeAntithrombotic.authorDatetime during IschemicStrokeEncounter.relevantPeriod             …which refers to…             Antithrombotic Therapy at Discharge                ["Medication, Discharge": "Antithrombotic Therapy"]