The TX_PVLS MER indicator provides data on clients who have received a viral load (VL) test in the last 12 months and the percentage of those clients who were virally suppressed at the most recent test. It does not, however, provide data on viral suppression among clients eligible to receive a VL test (coverage estimate). In order to estimate VL suppression coverage for all clients on ART, the PEPFAR Mozambique SI team uses TX_CURR from six months prior as a denominator. To date, the team has used manually abstracted data (PMTCT_ART Already on ART) from the ANC registries to estimate VL suppression among pregnant and breastfeeding women specifically. The team expressed a need for a more precise estimate of pregnant and breastfeeding women eligible for a VL test, extracted from SESP.