Kristina T Grehan, - Medicare Nurse Practitioner in Syosset, NY

Kristina T Grehan, is a medicare enrolled "Nurse Practitioner - Family" in Syosset, New York. She graduated from nursing school in 2013 and has 13 years of diverse experience with area of expertise as Nurse Practitioner. She is a member of the group practice North Shore Hematology Oncology Associates Pc and her current practice location is 2 Spruce Park, Syosset, New York. You can reach out to her office (for appointments etc.) via phone at (516) 496-2932.

Kristina T Grehan is licensed to practice in New York (license number F338161-1) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1992138218.

Contact Information

Kristina T Grehan,
2 Spruce Park,
Syosset, NY 11791-4213
(516) 496-2932
Not Available

Map and Direction




Provider's Profile

Full NameKristina T Grehan
GenderFemale
SpecialityNurse Practitioner
Experience13 Years
Location2 Spruce Park, Syosset, New York
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Kristina T Grehan graduated from nursing school in 2013
  NPI Data:
  • NPI Number: 1992138218
  • Provider Enumeration Date: 08/11/2013
  • Last Update Date: 08/11/2013
  Medicare PECOS Information:
  • PECOS PAC ID: 9931408077
  • Enrollment ID: I20170508001034

Medical Identifiers

Medical identifiers for Kristina T Grehan such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1992138218NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363LF0000XNurse Practitioner - Family F338161-1 (New York)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
North Shore Hematology Oncology Associates Pc1456243641474

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. Kristina T Grehan allows following entities to bill medicare on her 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 NameNorth Shore-lij Medical PC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1053688572
PECOS PAC ID: 3375701568
Enrollment ID: O20120220000262

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. Kristina T Grehan 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
Kristina T Grehan,
2 Spruce Park,
Syosset, NY 11791-4213

Ph: Not Available
Kristina T Grehan,
2 Spruce Park,
Syosset, NY 11791-4213

Ph: (516) 496-2932

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.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

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