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Karleung Siu
out of 5
  • Oncology and Hematology
  • Cancer Services
Accepting new patients

Appointments: Call 973-471-0981


Location Pin Icon

1255 Broad Street Oncology and Hematology

1255 Broad Street
Pavilion C, 2nd Floor
Clifton, NJ 07013
United States

Location Pin Icon

150 Park Avenue Oncology and Hematology

150 Park Avenue
3rd Floor
Florham Park, NJ 07932
United States

Clinical Expertise

  • Acute myelogenous leukemia (AML)
  • Additional / adjuvant therapy
  • Anaplastic large cell lymphoma (ALCL)
  • Anaplastic large-cell lymphoma
  • Anemia
  • Anticardiolipin antibodies
  • Antiphospholipid antibodies
  • Antithrombin III deficiency
  • Aplastic anemia
  • Aromatase Inhibitors
  • B12 deficiency
  • Bladder cancer
  • Blood diseases
  • Blood transfusions
  • Bone marrow aspiration
  • Bone marrow biopsy
  • Breast cancer
  • CMML
  • Cancer care
  • Chemoprevention
  • Chemotherapy
  • Chemotherapy clinical trials
  • Chemotherapy side effect support
  • Chronic lymphocytic leukemia (CLL)
  • Chronic myelogenous leukemia (CML)
  • Clinical trials
  • Colon cancer
  • Complete blood count
  • Cooley's anemia
  • Cutaneous ALCL
  • Deep vein thrombosis (DVT)
  • Diffuse large B-cell lymphoma
  • Duodenal cancer
  • Esophageal cancer
  • Esophageal tumors
  • Extreme fatigue
  • Factor 5 Leiden
  • Follicular lymphoma
  • Frequent bruising
  • Frequent fever
  • Frequent nosebleed
  • Gallbladder cancer / carcinoma
  • Gastric cancer
  • Head and neck cancer
  • Hemochromatosis
  • Hemoglobin H disease
  • Hemophilia
  • Hepatic tumors
  • Hepatocellular carcinoma
  • Hodgkin lymphoma
  • Hormone therapy
  • Immunotherapy
  • Iron deficiency anemia
  • Iron level test
  • Laryngeal cancer
  • Leukemia
  • Leukocytopenia
  • Leukocytosis
  • Lipoma excision
  • Liver tumors
  • Lumbar puncture
  • Lump in groin
  • Lump in neck
  • Lump under arm
  • Lupus anticoagulant
  • Lymphocytic leukemia
  • Lymphoma
  • Mantle cell lymphoma
  • Marginal zone lymphoma
  • Multiple myeloma
  • Myelodysplastic syndrome (MDS)
  • Myelogenous leukemia
  • Myeloproliferative disorders
  • Nasopharyngeal cancer
  • Neoadjuvant chemotherapy
  • Non-Hodgkin lymphoma
  • Non-small cell lung cancer
  • Oropharyngeal cancer
  • Ovarian cancer
  • PET
  • Pain Management
  • Pain on left side of belly
  • Pancreatic cancer
  • Pathology review
  • Peritoneal cancer
  • Platelet disorders
  • Polycythemia vera (PV)
  • Positron emission tomography (PET)
  • Prostate cancer
  • Protein C deficiency
  • Protein S deficiency
  • Prothrombin gene mutation
  • Pulmonary embolism (PE)
  • Radiation therapy
  • Raised red bumps on skin
  • Rectal cancer
  • Red blood cell disorders
  • Renal cell cancer
  • Risk-reduction medications
  • Sickle cell anemia
  • Small cell lung cancer
  • Stem cell transplant
  • Stomach cancer
  • Swollen glands
  • Swollen lymph nodes
  • Systemic ALCL
  • Tamoxifen
  • Thalassemia
  • Thrombocytopenia
  • Thrombocytosis
  • Thrombophilia
  • Tonsillar cancer
  • White blood cell disorders

Accepted Insurances

Always check with your health insurance carrier before scheduling any type of service. You can learn the details of your individual health insurance plan, including the amount of your copay, deductible, and coinsurance by visiting your health insurance company's website or by calling their customer service department. Click here to review our list of accepted insurance plans.

Training and Education

Board Certification

  • Hematology
  • Medical Oncology
  • Internal Medicine

Medical School

  • SUNY Downstate College of Medicine, Brooklyn, NY


  • Biomedical Education, City College of New York, New York, NY


  • Internal Medicine, North Shore University Hospital - Manhasset, Manhasset, NY


  • Hematology/Oncology, Mount Sinai Beth Israel - New York, NY
  • Palliative Care, North Shore University Hospital - Manhasset, Manhasset, NY

About Me

KarLeung Siu, MD is part of Summit Health’s Oncology/Hematology team. Dr. KarLeung Siu provides patients with access to expert cancer care through expertise in diagnosis and treatment of various cancers. He is especially skilled in treating lung and head/neck cancers, an area of great focus for him during his early years of practice and previous training. In addition to specializing in thoracic malignancies, Dr. Siu has a strong interest in hematologic disorders, including lymphomas and leukemias.

“No one chooses to be sick. I pursue health care to empower people to battle their illness while standing behind them throughout their fight,” says Dr. Siu.  

Prior to joining Summit Health, Dr. Siu acted as Attending and Chief of Medical Oncology and Hematology at an accredited, not-for-profit health care facility. In addition, over the years he has been afforded the great opportunity of participating in several lung cancer studies and continues to participate in studies which will help advance treatment options for patients.

Dr. Siu belongs to the American Society of Clinical Oncology and serves on the Hoosier Cancer Research Network Thoracic Clinical Trial Working Group. He is fluent in English, Cantonese, and Spanish.

English, Cantonese, Spanish

Hospital Affiliations

  • Morristown Medical Center
  • Cooperman Barnabas Medical Center