- Abnormal bleeding
- Amyloidosis
- Anal cancer
- Anemia
- Antiphospholipid syndrome
- Antithrombin deficiency
- Aplastic anemia
- Autoimmune hemolytic anemia
- Beta thalassemia
- Bile duct cancer (Cholangiocarcinoma)
- Bladder cancer
- Blood clots
- Blood coagulation factor IX
- Blood coagulation factor VIII
- Breast cancer
- Castleman disease (CD)
- Chronic lymphocytic lymphoma
- Chronic myeloid leukemia (CML)
- Chronic myelomonocytic leukemia (CMML)
- Clotting disorders
- Cold agglutinin disease
- Colon cancer
- Colorectal cancer
- Cryoglobulinemia
- Deep vein thrombosis
- Enlarged spleen (Splenomegaly)
- Esophageal cancer
- Essential thrombocytosis
- Factor V leiden
- G6PD deficiency
- Gallbladder cancer
- Gastrointestinal cancer
- Gastrointestinal stromal tumor
- Hairy cell leukemia
- Head and neck cancer
- Hemolytic anemia
- Heparin-induced thrombocytopenia
- Hereditary spherocytosis
- Hodgkin's lymphoma
- Hypercoagulable states
- Immune thrombocytopenic purpura (ITP)
- Iron deficiency anemia
- Kappa light chain disease
- Kidney cancer
- Leukocytosis (High white blood count)
- Leukopenia (Low white blood cell count)
- Light chain deposition disease
- Liver cancer
- Lung cancer
- Lupus anticoagulant disorder
- Lymphopenia (Low lymphocyte count)
- Marginal zone lymphoma
- Melanoma skin cancer
- Merkel cell skin cancer
- Multiple myeloma
- Myelodysplastic syndrome (MDS)
- Myelofibrosis
- Myeloproliferative disease
- Neuroendocrine tumors
- Neutropenia (Low neutrophil count)
- Pancreatic cancer
- Pancytopenia (Low blood cell count)
- Paroxysmal nocturnal hemoglobinuria (PNH)
- Peripheral T-cell lymphoma
- Pernicious anemia
- Platelet function disorder
- Polycythemia
- Postthrombotic syndrome
- Primary central nervous system lymphoma
- Prostate cancer
- Protein C deficiency
- Protein S deficiency
- Prothrombin gene mutation
- Pure red-cell aplasia (PRCA)
- Rectal cancer
- Sarcoma
- Sickle cell disease
- Skin cancer
- Testicular cancer
- Thalassemia
- Thrombocytopenia (Low platelet count)
- Thrombocytosis (High platelet count)
- Thrombophilia (Excessive blood clotting)
- Thyroid cancer
- Vitamin B12 deficiency
- Von Willebrand disease
- Waldenstrom macroglobulinemia
John Youssef, MD
Hematology, Medical Oncology
Accepting new patients
Sees patients age 18 and up
Penn Hematology/Oncology Bucks County
Penn Medicine Provider
About me
My education and training
- Medical School: Medical College of Ohio
- Residency: Virginia Commonwealth University School of Medicine
- Fellowship: Virginia Commonwealth University School of Medicine
Spoken languages
English
English
Reviews
878 reviews
Comments are submitted by patients and reflect their views and opinions. The comments are not endorsed by and do not necessarily reflect the views of Penn Medicine.
Insurance accepted
Please contact the practice and/or the member services department of your insurance company for specific details before receiving services. Providers may participate in some, but not all, products offered by a health plan; providers may also accept plans at some practice locations but not others.
- Aetna Advantra Cares D-SNP
- Aetna Advantra Credit Value
- Aetna Advantra Eagle HMO
- Aetna Advantra Eagle POS
- Aetna Advantra Premier Plus PPO
- Aetna Advantra Value
- Aetna Advantra Value Plus
- Aetna APCN Plus (Multi-Tier)
- Aetna Better Health Kids (CHIP) - DH Only
- Aetna Flexible Five
- Aetna Freedom Core
- Aetna Gold
- Aetna HMO
- Aetna Philly Prime
- Aetna POS
- Aetna PPO APCN
- Aetna Premier
- Aetna Premier Plus
- Aetna Savings Plus
- Aetna Signature Administrators
- Aetna Student Health Plan PPO
- Aetna Upfront Advantage
- First Health HMO
- First Health POS
- First Health PPO
- Meritain - Aramark (Other)
- Meritain - Aramark (Pennsylvania Premier Medical Plan)
- Americhealth Caritas of PA VIP - LGH Only
- Amerihealth Caritas (Transplant patients only)
- Amerihealth Caritas of PA - LGH Only
- Centivo EPO
- Cigna Healthcare EPO
- Cigna Healthcare HMO
- Cigna Healthcare POS
- Cigna Healthcare PPO
- Claim Watcher (Homestead/ INDECs) Open Access
- Clover Health Choice
- Clover Health Choice Value PPO
- Clover Health Classic HMO
- Clover Health Value
Locations
Penn Medicine hospital privileges
- Hospital of the University of Pennsylvania: Has privileges to treat patients in the hospital.
- Penn Presbyterian Medical Center: On the medical staff, but does not have privileges to treat patients in the hospital.
Qualifications and experience
- Hematology, 2006
- Medical Oncology, 2006