Rollover Study to Provide Continued Treatment for Participants With B-Cell Malignancies Previously Enrolled in Studies of Parsaclisib (INCB050465)

Inclusion Criteria:

• Currently enrolled and receiving treatment in an Incyte-sponsored clinical study of parsaclisib.
• Currently tolerating treatment in the parent Protocol.
• Currently receiving clinical benefit from treatment with parsaclisib as monotherapy or in combination therapy with Itacitinib, ruxolitinib, or ibrutinib as determined by the investigator.
• Has at least stable disease, as determined by the investigator.
• Has demonstrated compliance, as assessed by the investigator, with the parent Protocol requirements.
• Willingness and ability to comply with scheduled visits, treatment plans, including PJP prophylaxis, and any other study procedures indicated in this Protocol.
• Willingness to avoid pregnancy or fathering children
• Ability to comprehend and willingness to sign an ICF

Exclusion Criteria:

• Has been permanently discontinued from study treatment in the parent Protocol for any reason.
• Able to access parsaclisib as monotherapy or in combination with itacitinib, ruxolitinib, or ibrutinib therapy outside a clinical study.
• Participants with an uncontrolled intercurrent illness or any concurrent condition that, in the investigator's opinion, would jeopardize the safety of the participant or compliance with the Protocol.
• Pregnant or breastfeeding women.