Dr Mark Williams, MD - Medicare Emergency Medicine in Northport, NY

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Dr Mark Williams, MD is a medicare enrolled "Emergency Medicine" physician in Northport, New York. His current practice location is 79 Middleville Rd, Northport, New York. You can reach out to his office (for appointments etc.) via phone at (631) 261-4400.

Dr Mark Williams is licensed to practice in New York (license number 178086) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1275645806.

Contact Information

Dr Mark Williams, MD
79 Middleville Rd,
Northport, NY 11768-2200
(631) 261-4400
Not Available

Map and Direction




Physician's Profile

Full NameDr Mark Williams
GenderMale
SpecialityEmergency Medicine
Location79 Middleville Rd, Northport, New York
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1275645806
  • Provider Enumeration Date: 08/31/2006
  • Last Update Date: 07/08/2007
  Medicare PECOS Information:
  • PECOS PAC ID: 4688850241
  • Enrollment ID: I20110516000455

Medical Identifiers

Medical identifiers for Dr Mark Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1275645806NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine 178086 (New York)Primary

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 Mark Williams 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 Mark Williams, MD
26 Preston St,
Huntington, NY 11743-2053

Ph: (631) 424-5959		Dr Mark Williams, MD
79 Middleville Rd,
Northport, NY 11768-2200

Ph: (631) 261-4400

Reviews and Comments


Emergency Medicine Doctors in Northport, NY

Linda Moerck, DO
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 1014 Fort Salonga Rd, Northport, NY 11768
Phone: 631-757-5604    

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.