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Dr. John O. Mascarenhas sees patients in Manhattan as a hematologist with Icahn School of Medicine at Mount Sinai.
New York Medical College is where Dr. Mascarenhas went to medical school, graduating in 2002.
The office is at 1 Gustave L Levy Pl, New York, NY 10029; the phone number on record is (212) 731-7650. Dr. Mascarenhas accepts Medicare assignment, which means he takes the Medicare-approved amount as full payment for covered services.
Dr. Mascarenhas is affiliated with Mount Sinai Hospital, Mount Sinai Beth Israel and Mount Sinai South Nassau.
Your review of Dr. Mascarenhas — wait times, how well things were explained, how you were treated — helps other patients decide.
Dr. Mascarenhas at a glance
- Specialty
- Hematologist
- Credentials
- MD
- Practice
- Icahn School of Medicine at Mount Sinai
- Address
- 1 Gustave L Levy Pl, New York, NY 10029
- Phone
- (212) 731-7650
- Medical school
- New York Medical College (2002)
- Hospital affiliations
- Mount Sinai Hospital, Mount Sinai Beth Israel, Mount Sinai South Nassau
- Medicare assignment
- Accepts
- NPI number
- 1376719104
- NY license no.
- 235966
Medicare, Medicaid and hospitals
- Medicare patients (2024)
- 197 people with traditional Medicare, average age 75
- New York Medicaid
- Enrolled fee-for-service provider since 2018. Medicaid managed-care plans keep their own networks, so check with your plan.
- Hospital pages
- Mount Sinai Beth Israel · Mount Sinai Hospital · Mount Sinai South Nassau
Medicare figures cover people with traditional (fee-for-service) Medicare only; services billed for fewer than 11 patients are not published.
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Frequently Asked Questions
With Icahn School of Medicine at Mount Sinai, at 1 Gustave L Levy Pl, New York, NY 10029.
Call the office at (212) 731-7650.
Yes — Dr. Mascarenhas accepts Medicare assignment, taking the Medicare-approved amount as full payment for covered services.
Mount Sinai Hospital, Mount Sinai Beth Israel and Mount Sinai South Nassau.
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