Objective: Develop and pilot-test a nurse-led primary palliative care intervention for patients with advanced hematologic malignancies. Background: Nurse-led primary palliative care interventions may improve outpatient palliative care provision for patients with advanced hematologic malignancies. Methods: This two-phase, single-arm pilot study involved patients with recurrent or resistant hematologic malignancies, their caregivers, and oncology clinicians at two US-based urban, university-affiliated oncology clinics. Measurements included feasibility (enrollment rates, intervention fidelity, and outcome assessment rates) and acceptability (patient, caregiver, and clinician surveys). Results: In Phase 1 we developed and implemented an oncology nurse-led primary palliative care intervention for patients with recurrent or resistant hematologic malignancies and their caregivers. In Phase 2, we tested feasibility and acceptability. Twenty-six patient participants enrolled. Consent-to-approach rate was 78% and enrolled-to-consent rate was 84%. All enrolled participants received the intervention per protocol. Sixty-nine percent of patients and 100% of caregivers reported that the intervention helped them better understand the patient's illness and cope. Seventy-five percent of oncologists reported that the intervention improved their patients' quality of care, and 25% reported that it helped them take better care of patients. Conclusions: Although our pilot of oncology nurse-led primary palliative care for patients with advanced hematologic malignancies met some of its secondary feasibility endpoints, it did not meet its primary feasibility endpoint (enrollment) and acceptability was mixed. Protecting nursing staff time, increasing patient and clinician involvement in intervention development, and identifying patients with highest supportive needs may improve feasibility and acceptability of future primary palliative care in hematologic malignancy trials.