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Dr. John Mascarenhas, MD

Medical Oncology*
5.0 (14)
Map Pin Small New York, NY
Accepting new patients

Offers telehealth

Overview of Dr. John Mascarenhas, MD

Dr. John Mascarenhas, MD is a Medical Oncology Specialist in New York, NY. Dr. Mascarenhas, completed a fellowship at Mt Sinai School of Medicine Hospital. Dr. Mascarenhas, completed a residency at Rhode Island Hospital Brown University. Patients rated Dr. Mascarenhas an average 5.0 star rating.

Dr. Mascarenhas works at Ruttenberg Treatment Center in New York, NY. They frequently treat conditions like Thrombocytosis, Myeloproliferative Disorders and Polycythemia Rubra Vera along with other conditions at varying frequencies. They are accepting new patients and accept Aetna, Anthem and Blue Cross Blue Shield as well as other major insurance plans. Please call ahead to schedule an appointment and to confirm all accepted insurance plans.

Dr. Mascarenhas' Office Locations

  1. 1
    The Ruttenberg Treatment Center
    1470 Madison Ave Fl 3, New York, NY 10029 Icon Directions Right Arrow Directions Phone Icon (212) 257-0065
    Monday
    09:00 - 17:00
    Tuesday
    09:00 - 17:00
    Wednesday
    09:00 - 17:00
    Thursday
    09:00 - 17:00
    Friday
    09:00 - 17:00

Experience & Treatment Frequency

NEW FEATURE

What is treatment frequency?

Our treatment frequency feature helps you understand howoften a provider performs or treats a specificprocedure/condition compared to other doctors. Providersrank in one of four frequency categories:

Very HighFrequency
HighFrequency
NormalFrequency
May Perform

Specific procedures/conditions that don’t haveenough data are indicated with “May Perform”. We encourageyou to contact the provider with questions about theirexperience.

Search for conditions or procedures.
Thrombocytosis
Myeloproliferative Disorders
Polycythemia Rubra Vera
Thrombocytosis
Myeloproliferative Disorders
Polycythemia Rubra Vera

Treatment frequency



Many providers have expertise treating multiple conditions or procedures. FindCare uses a variety of data sources to determine which conditions or procedures a provider treats and their level of experience.
Thrombocytosis
Myeloproliferative Disorders
Polycythemia Rubra Vera
Chronic Myeloid Leukemia (CML)
Acute Leukemia
Acute Lymphoid Leukemia
Acute Myeloblastic Leukemia Type 3
Acute Myeloid Leukemia
Anemia
  • View other providers who treat Anemia
Bleeding Disorders
Coagulation Disorders
Myelodysplastic Syndromes
Pancytopenia
Retroperitoneum Cancer
Venous Embolism and Thrombosis
Bone Marrow Biopsy
Acute Monocytic and Monoblastic Leukemia
Acute Myeloid Leukemia Multilineage Dysplasia
Acute Myeloid Leukemia with 11q23 Abnormality
Acute Myelomonocytic Leukemia
Acute Panmyelosis with Myelofibrosis
Anaplastic Large Cell Lymphoma
Anaplastic Large Cell Lymphoma, ALK Positive
Antiphospholipid Syndrome (APS)
Astrocytoma
Basal Cell Carcinoma
Bladder Cancer
Blood Disorders in Pregnancy
Bone Cancer
Brain Cancer
Breast Cancer
Breast Lump
Central Nervous System Lymphoma
Cholangiocarcinoma
Chordoma
  • View other providers who treat Chordoma
Chronic Lymphocytic Leukemia
Chronic Myelomonocytic Leukemia
Coagulation Defects in Pregnancy and Postpartum
Colorectal Cancer
Constitutional Aplastic Anemia
Deep Vein Thrombosis (DVT)
Diffuse Large B-Cell Lymphoma
Drug Induced Aplastic Anemia
Duodenal Cancer
Endocrine Gland Cancer
Gallbladder and Biliary Tract Cancer
Head and Neck Cancer
Hemochromatosis
Hemophilia
Hodgkin's Disease
Hypercoagulable State
Immune Thrombocytopenia
Immune Thrombocytopenic Purpura (ITP)
Kidney Cancer
Laryngeal Cancer
Leukocytopenia
Leukocytosis
Liver Cancer
Lung Cancer
Lymphocytopenia
Lymphocytosis
Lymphoma
  • View other providers who treat Lymphoma
Lymphosarcoma
Macroglobulinemia (incl. Waldenstrom's )
Malignant Pituitary Gland Tumor
Marginal Zone Lymphoma
Mast Cell Diseases
Maternal Anemia
Mediastinal B-Cell Lymphoma
Medulloblastoma
Melanoma
  • View other providers who treat Melanoma
Metastatic Respiratory System Cancer
Myeloma
  • View other providers who treat Myeloma
Neuroendocrine Tumors
Neutropenia
Nodular Lymphoma
Non-Hodgkin's Lymphoma
Nose Cancer
Oral Cancer
Osteosarcoma
Ovarian Cancer
Paroxysmal Nocturnal Hemoglobinuria
Pernicious Anemia
Pineal Region Tumors
Pituitary Tumor
Primary Central Nervous System Lymphoma
Primary Hypercoagulable State
Prostate Cancer
Purpura
  • View other providers who treat Purpura
Qualitative Platelet Defects (incl. Glanzmann's Thrombasthenia)
Reticulosarcoma
Schwannoma
Secondary Malignancies
Skin Cancer
Small Intestine Cancer
Squamous Cell Carcinoma of Skin
Stomach and Small Intestine Cancer
Stomach Cancer
Thalassemia
Thalassemia Minor
Throat Cancer (Nasopharyngeal)
Thyroid Cancer
Upper Digestive Tract Cancer
Urinary Tract Cancer
Uterine Cancer
Vitamin B Deficiency
Vitamin B12 Anemia
Vitamin B12 Deficiency
von Willebrand Disease
Anemia and Iron Deficiency Screening
Bone Marrow Evaluation
Erythropoietin Test
Leukemia Diagnostic Evaluations
Lymphoma Evaluation
Plasmapheresis
Thoracentesis
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    Insurance Accepted

    • Aetna
    • Amerihealth
    • Anthem
    • Blue Cross Blue Shield
    • CareFirst Blue Cross Blue Shield
    • Cigna
    • First Health
    • Humana
    • MultiPlan

    * Please verify this information when scheduling an appointment.

    Ratings & Reviews

    5.0
    Average provider rating
    Based on 14 ratings
    Patient Ratings (14)
    5 Star
    (14)
    4 Star
    (0)
    3 Star
    (0)
    2 Star
    (0)
    1 Star
    (0)
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    Dr. Mascarenhas' Office & Staff

    • Ease of scheduling urgent appointments
    • Office environment, cleanliness, comfort, etc.
    • Staff friendliness and courteousness
    • Total wait time (waiting & exam rooms)

    Experience with Dr. Mascarenhas

    • Level of trust in provider's decisions
    • How well provider explains medical condition(s)
    • How well provider listens and answers questions
    • Hpends appropriate amount of time with patients

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    About Dr. John Mascarenhas, MD

    Specialties*
    • Medical Oncology

    • *Healthline does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
    Specialties*
    Languages Spoken
    • English
    Languages Spoken
    Gender
    • Male
    Gender
    NPI Number
    • 1376719104
    NPI Number
    A National Provider Identifier (NPI) is a unique 10-digit identifier issued by the government to healthcare providers.

    Education & Certifications

    Fellowship
    • Mt Sinai School of Medicine Hospital
    Fellowship
    Residency
    • Rhode Island Hospital Brown University
    Residency
    Board Certifications
    • Hematology
    Board Certifications
    What’s a board certification and why is it important that my provider has one?

    A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.

    Hospital Affiliations

    • Mount Sinai Hospital

    Frequently Asked Questions

    Dr. John Mascarenhas, MD is accepting new patients on Healthline FindCare. You can check to see if Dr. Mascarenhas is offering online scheduling or call the provider’s office for more information.

    Dr. Mascarenhas has indicated that they do offer telehealth services. Please call the provider’s office at for more information.

    Dr. Mascarenhas works at Ruttenberg Treatment Center in New York, NY. View the full address on Dr. Mascarenhas’s profile.

    Dr. Mascarenhas has seen patients for Thrombocytosis, Myeloproliferative Disorders and Polycythemia Rubra Vera, and more. You can see other conditions treated by Dr. Mascarenhas on their profile. Please call the provider’s office to confirm all visit reasons.

    14 patients have reviewed Dr. Mascarenhas. The overall rating for this provider is 5.0. You can read verified reviews and ratings and leave your own review based on your experience with Dr. Mascarenhas.

    Whether a person prefers to schedule an appointment online or over the phone with Dr. Mascarenhas, there are benefits to both methods. A person calling to schedule an with Dr. Mascarenhas appointment can ask questions about the practice, provider availability, conditions treated, procedures performed, and if their insurance carrier is accepted. While online scheduling is quicker, easier, allows one to view a wide range of appointment times, and may provide the ability to sync with a personal calendar.

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