The parish of the Most Precious Blood was established in 1888 as a National Parish to serve the rapidly growing number of Italian immigrants in Lower Manhattan. Building of the church was begun by the Scalabrini Fathers around 1891. The Scalabrini Order built the foundation but ran out of funding. The Franciscans then took over the parish and completed the church building in 1904.
During the Feast of San Gennaro, which is held yearly in September, a celebratory Mass is held at the church on the last Saturday of the festival. After the Mass, a statue of San Gennaro is taken from its home within the church on a procession through the streets of Little Italy. Most Precious Blood is home to several vibrant religious societies in addition to the Figli di San Gennaro, including: the Community of Sant Egidio, and the San Angelo Society. Besides the strong Italian tradition, the Vietnamese congregation has also grown in recent years. The Church is home to the Vietnamese Arts and Learning Cultural Center.
The Saint Rocco of Potenza Society was originally founded in 1889 at the now demolished St. Joachim's Church on Roosevelt Street. It then moved to St. Joseph Church on Monroe Street, but with the merger in 2015 of St. Joseph's with the Church of the Transfiguration on Mott Street, the Society is now based at the Shrine Church of the Most Precious Blood.
Due to manpower shortages, in March 2014, the Franciscans withdrew from Most Precious Blood and it came under diocesan administration. In 2015, the church became part of the parish of St. Patrick's Old Cathedral.