Steven Gruenstein, MD - Medicare Hematology/oncology in New York, NY

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Steven Gruenstein, MD is a medicare enrolled "Internal Medicine - Hematology & Oncology" physician in New York, New York. He graduated from medical school in 1984 and has 40 years of diverse experience with area of expertise as Hematology/oncology. He is a member of the group practice North Shore Hematology Oncology Associates Pc and his current practice location is 12 E 86th St Ofc 4, New York, New York. You can reach out to his office (for appointments etc.) via phone at (212) 861-6660.

Steven Gruenstein is licensed to practice in New York (license number 1776051) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1407855307.

Contact Information

Steven Gruenstein, MD
12 E 86th St Ofc 4,
New York, NY 10028-0517
(212) 861-6660
(212) 744-4696

Map and Direction




Physician's Profile

Full NameSteven Gruenstein
GenderMale
SpecialityHematology/oncology
Experience40 Years
Location12 E 86th St Ofc 4, New York, New York
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Steven Gruenstein graduated from medical school in 1984
  NPI Data:
  • NPI Number: 1407855307
  • Provider Enumeration Date: 07/21/2005
  • Last Update Date: 01/17/2020
  Medicare PECOS Information:
  • PECOS PAC ID: 7810905478
  • Enrollment ID: I20060323000785

Medical Identifiers

Medical identifiers for Steven Gruenstein such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1407855307NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RH0003XInternal Medicine - Hematology & Oncology 1776051 (New York)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Vns Of Ny Home Care ChhaNew york, NYHome health agency
Mount Sinai HospitalNew york, NYHospital
Lenox Hill HospitalNew york, NYHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
North Shore Hematology Oncology Associates Pc1456243641344

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Steven Gruenstein allows following entities to bill medicare on his behalf.
Entity NameNorth Shore Hematology Oncology Associates Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1396794574
PECOS PAC ID: 1456243641
Enrollment ID: O20040324001766
Entity NameCentral Park Hematology & Oncology, P.c.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1467430447
PECOS PAC ID: 0749171759
Enrollment ID: O20080324000123

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Steven Gruenstein is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Steven Gruenstein, MD
1500 Route 112 Bldg 4,
Port Jefferson Station, NY 11776-8055

Ph: (631) 751-3000		Steven Gruenstein, MD
12 E 86th St Ofc 4,
New York, NY 10028-0517

Ph: (212) 861-6660

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

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