Dr William J Kornrich, MD - Medicare Internal Medicine in Riverhead, NY

Dr William J Kornrich, MD is a medicare enrolled "Internal Medicine" physician in Riverhead, New York. He went to State University Of New York At Stony Brook, School Of Medicine and graduated in 1988 and has 36 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice New York University and his current practice location is 887 Old Country Rd, Suite A, Riverhead, New York. You can reach out to his office (for appointments etc.) via phone at (631) 727-6122.

Dr William J Kornrich is licensed to practice in New York (license number 182977) 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 1144332198.

Contact Information

Dr William J Kornrich, MD
887 Old Country Rd, Suite A,
Riverhead, NY 11901-2115
(631) 727-6122
(631) 727-2672

Map and Direction




Physician's Profile

Full NameDr William J Kornrich
GenderMale
SpecialityInternal Medicine
Experience36 Years
Location887 Old Country Rd, Riverhead, 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:
  • Dr William J Kornrich attended and graduated from State University Of New York At Stony Brook, School Of Medicine in 1988
  NPI Data:
  • NPI Number: 1144332198
  • Provider Enumeration Date: 08/31/2006
  • Last Update Date: 03/10/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 3779770771
  • Enrollment ID: I20110831000280

Medical Identifiers

Medical identifiers for Dr William J Kornrich such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1144332198NPI-NPPES
01265916MedicaidNY

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 182977 (New York)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Tender Loving Care, An Amedisys CompanyMedford, NYHome health agency
Peconic Bay Homehealth ServicesRiverhead, NYHome health agency
Catholic Home CareFarmingdale, NYHome health agency
Suny/stony Brook University HospitalStony brook, NYHospital
Long Island Community HospitalPatchogue, NYHospital
New York University Langone Medical CenterNew york, NYHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
New York University13552324224495

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. Dr William J Kornrich allows following entities to bill medicare on his behalf.
Entity NameCentral Suffolk Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1043402050
PECOS PAC ID: 4981508082
Enrollment ID: O20031120000840
Entity NameNew York University
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1285826438
PECOS PAC ID: 1355232422
Enrollment ID: O20090822000026
Entity NameWinthrop Community Medical Affiliates Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1457873077
PECOS PAC ID: 5698092385
Enrollment ID: O20150317001669

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. Dr William J Kornrich 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
Dr William J Kornrich, MD
887 Old Country Rd, Suite A,
Riverhead, NY 11901-2115

Ph: (631) 727-6122
Dr William J Kornrich, MD
887 Old Country Rd, Suite A,
Riverhead, NY 11901-2115

Ph: (631) 727-6122

Reviews and Comments


Internal Medicine Doctors in Riverhead, NY

Dr. Rameshchandra Dabhi, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 951 Roanoke Ave, Riverhead, NY 11901
Phone: 631-727-7773    Fax: 631-369-4994
Ricardo Juan Monserrate, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1279 E Main St, Riverhead, NY 11901
Phone: 631-727-2100    Fax: 631-727-2646
Sara Ann Cerrone, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 31 Main Rd Ste 1, Riverhead, NY 11901
Phone: 631-298-4479    
Dr. Daniel Colin Massiah, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1025 Roanoke Ave, Riverhead, NY 11901
Phone: 631-727-6717    Fax: 631-953-0204
Dr. Yelda Nouri, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 750 Old Country Road Building 2, Riverhead, NY 11901
Phone: 631-751-3000    Fax: 631-509-6559
Dr. Afzal M Butt,
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 912 Roanoke Ave, Riverhead, NY 11901
Phone: 631-369-8000    
Marie-jose Dorval-dorcely, M.D
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 300 Center Dr, Riverhead, NY 11901
Phone: 631-852-1800    Fax: 631-852-1807

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.