Mary Kristine Ellis, MD - Medicare Family Practice in Oceanside, NY

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Mary Kristine Ellis, MD is a medicare enrolled "Family Medicine" physician in Oceanside, New York. She graduated from medical school in 2009 and has 16 years of diverse experience with area of expertise as Family Practice. She is a member of the group practice Mount Sinai School Of Medicine and her current practice location is 196 Merrick Rd, Oceanside, New York. You can reach out to her office (for appointments etc.) via phone at (516) 255-8400.

Mary Kristine Ellis is licensed to practice in New York (license number 277569) 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 1134447329.

Contact Information

Mary Kristine Ellis, MD
196 Merrick Rd,
Oceanside, NY 11572-1420
(516) 255-8400
Not Available

Map and Direction




Physician's Profile

Full NameMary Kristine Ellis
GenderFemale
SpecialityFamily Practice
Experience16 Years
Location196 Merrick Rd, Oceanside, 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:
  • Mary Kristine Ellis graduated from medical school in 2009
  NPI Data:
  • NPI Number: 1134447329
  • Provider Enumeration Date: 05/12/2010
  • Last Update Date: 12/06/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 4880838721
  • Enrollment ID: I20150422001580

Medical Identifiers

Medical identifiers for Mary Kristine Ellis such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1134447329NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Q00000XFamily Medicine ME116438 (Florida)Secondary
390200000XStudent In An Organized Health Care Education/training Program (* (Not Available))Secondary
207Q00000XFamily Medicine 277569 (New York)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Mount Sinai South NassauOceanside, NYHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Mount Sinai School Of Medicine6406096544133

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. Mary Kristine Ellis allows following entities to bill medicare on her behalf.
Entity NameWyckoff Professional Medical Services Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1659710796
PECOS PAC ID: 6406748607
Enrollment ID: O20040324001805
Entity NameNyu Langone Hospitals
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1790975944
PECOS PAC ID: 4981515699
Enrollment ID: O20050721000058
Entity NameCity Medical Of Upper East Side Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1801277629
PECOS PAC ID: 0648465039
Enrollment ID: O20101111000052
Entity NameIcahn School Of Medicine At Mount Sinai
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1609120674
PECOS PAC ID: 8224282926
Enrollment ID: O20130205000439
Entity NameMount Sinai School Of Medicine
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1508127531
PECOS PAC ID: 6406096544
Enrollment ID: O20130712000368
Entity NameUnion Medical Care Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1184066698
PECOS PAC ID: 6204067895
Enrollment ID: O20140325000067

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. Mary Kristine Ellis 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
Mary Kristine Ellis, MD
1 Healthy Way,
Oceanside, NY 11572-1551

Ph: (516) 255-8400		Mary Kristine Ellis, MD
196 Merrick Rd,
Oceanside, NY 11572-1420

Ph: (516) 255-8400

Reviews and Comments


Family Medicine Doctors in Oceanside, NY

Kenya Crafton, FNP-BC
Family Medicine
Medicare: May Accept Medicare Assignments
Practice Location: 1 Healthy Way, Oceanside, NY 11572
Phone: 516-632-3000    
Dr. Zeeshan Alam Khan, MD
Family Medicine
Medicare: May Accept Medicare Assignments
Practice Location: 196 Merrick Rd, Oceanside, NY 11572
Phone: 516-255-8400    
Dr. Lillian Carolina, MD
Family Medicine
Medicare: May Accept Medicare Assignments
Practice Location: 1 Healthy Way, Oceanside, NY 11572
Phone: 516-255-8400    
Jamil Uddin Ahmed, MD
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1 Healthy Way, Oceanside, NY 11572
Phone: 516-632-3666    
Dr. Shara Rebecca Feltheimer, DO
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1 Healthy Way, Oceanside, NY 11572
Phone: 516-632-3000    
Malcolm Forbes, MD
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1 Healthy Way, Oceanside, NY 11572
Phone: 516-255-8414    

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).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.