Dr Gregory Williams, - Medicare Family Medicine in Merrimack, NH

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Dr Gregory Williams, is a medicare enrolled "Family Medicine" physician in Merrimack, New Hampshire. His current practice location is 382 Dw Hwy, Merrimack, New Hampshire. You can reach out to his office (for appointments etc.) via phone at (603) 424-4181.

Dr Gregory Williams is licensed to practice in New Hampshire (license number 11119) 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 1427045632.

Contact Information

Dr Gregory Williams,
382 Dw Hwy,
Merrimack, NH 03054-4152
(603) 424-4181
Not Available

Map and Direction




Physician's Profile

Full NameDr Gregory Williams
GenderMale
SpecialityFamily Medicine
Location382 Dw Hwy, Merrimack, New Hampshire
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1427045632
  • Provider Enumeration Date: 10/03/2005
  • Last Update Date: 08/23/2012
  Medicare PECOS Information:
  • PECOS PAC ID: 8527090547
  • Enrollment ID: I20050909000705

Medical Identifiers

Medical identifiers for Dr Gregory Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1427045632NPI-NPPES
110061100/AMedicaidMA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Q00000XFamily Medicine 11119 (New Hampshire)Primary
207Q00000XFamily Medicine 154397 (Massachusetts)Secondary

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 Gregory Williams allows following entities to bill medicare on his behalf.
Entity NameLahey Clinic Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1538194980
PECOS PAC ID: 2264336528
Enrollment ID: O20031120000097
Entity NameLahey Clinic Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1063447316
PECOS PAC ID: 2264336528
Enrollment ID: O20040629001269

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 Gregory 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 Gregory Williams,
Po Box 808,
Nashua, NH 03061-0808

Ph: (603) 578-5054		Dr Gregory Williams,
382 Dw Hwy,
Merrimack, NH 03054-4152

Ph: (603) 424-4181

Reviews and Comments


Family Medicine Doctors in Merrimack, NH

Dr. Edward Brooks Hall, M.D.
Family Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 294 Daniel Webster Hwy, Merrimack, NH 03054
Phone: 603-424-4713    Fax: 603-424-2915
Dr. Nicola Kernan, M.D.
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 4 Dobson Way, Merrimack, NH 03054
Phone: 603-424-4181    
Dr. Christopher Couture, M.D.
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 696 Daniel Webster Hwy, Merrimack, NH 03054
Phone: 603-429-3155    Fax: 603-424-8693
Dr. William Stewart Blackwood, M.D.
Family Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 382 Daniel Webster Hwy, Merrimack, NH 03054
Phone: 603-424-4181    
Dr. Anica Naprta, MD
Family Medicine
Medicare: Medicare Enrolled
Practice Location: 7 Executive Park Drive, Home Health & Hospice Care, Merrimack, NH 03054
Phone: 603-882-2941    Fax: 603-429-1844
Dr. Archie W Dickinson, MD
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 294 Daniel Webster Hwy, Dartmouth Hitchcock - Family Medicine, Merrimack, NH 03054
Phone: 603-424-4713    

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.