Thank you for your questions about CMS334 Cesarean Birth and CMS1028 Severe Obstetric Complications. Data elements for eCQMs come from various places within the electronic health record, using a variety of standardized coding systems in addition to ICD-10. The specific location and use of these data elements can vary depending on the EHR vendor and the healthcare organization. For eCQMs, SNOMED is typically used for data elements found in clinical documentation such as the problem list, assessments, and procedures - including start and end times. The value sets are specifically designed to be used with the eCQMs. For CMS1028/PC-07, you may notice that the value sets for risk adjustment diagnoses and SMM diagnoses contain only ICD-10 codes. This is due to the required Present on Admission (POA) indicators, which are typically captured in claims data with ICD-10 coding. You can review the codes contained in value sets on the Value Set Authority Center (VSAC) at https://vsac.nlm.nih.gov/ . We hope that helps.