Dr Marylyn Virginia Grondin, MD - Medicare Gastroenterology in Portsmouth, NH

Dr Marylyn Virginia Grondin, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Portsmouth, New Hampshire. She graduated from medical school in 1978 and has 46 years of diverse experience with area of expertise as Gastroenterology. She is a member of the group practice Atlantic Digestive Specialists Pllc and her current practice location is 330 Borthwick Ave, Suite 311, Portsmouth, New Hampshire. You can reach out to her office (for appointments etc.) via phone at (603) 433-2488.

Dr Marylyn Virginia Grondin is licensed to practice in New Hampshire (license number 8703) 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 1841266327.

Contact Information

Dr Marylyn Virginia Grondin, MD
330 Borthwick Ave, Suite 311,
Portsmouth, NH 03801-4174
(603) 433-2488
(603) 433-4649

Map and Direction




Physician's Profile

Full NameDr Marylyn Virginia Grondin
GenderFemale
SpecialityGastroenterology
Experience46 Years
Location330 Borthwick Ave, Portsmouth, New Hampshire
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:
  • Dr Marylyn Virginia Grondin graduated from medical school in 1978
  NPI Data:
  • NPI Number: 1841266327
  • Provider Enumeration Date: 02/24/2006
  • Last Update Date: 02/13/2012
  Medicare PECOS Information:
  • PECOS PAC ID: 7810965365
  • Enrollment ID: I20040922000401

Medical Identifiers

Medical identifiers for Dr Marylyn Virginia Grondin such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1841266327NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology 8703 (New Hampshire)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Portsmouth Regional HospitalPortsmouth, NHHospital
Exeter Hospital IncExeter, NHHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Atlantic Digestive Specialists Pllc094119832917

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 Marylyn Virginia Grondin allows following entities to bill medicare on her behalf.
Entity NameAtlantic Digestive Specialists Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1316048069
PECOS PAC ID: 0941198329
Enrollment ID: O20040308000758

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 Marylyn Virginia Grondin 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 Marylyn Virginia Grondin, MD
21 Clark Way,
Somersworth, NH 03878-4401

Ph: (603) 692-2228
Dr Marylyn Virginia Grondin, MD
330 Borthwick Ave, Suite 311,
Portsmouth, NH 03801-4174

Ph: (603) 433-2488

Reviews and Comments


Internal Medicine Doctors in Portsmouth, NH

Robert Millstein, MD
Gastroenterology
Medicare: Not Enrolled in Medicare
Practice Location: 100 Campus Dr, Suite 12, Portsmouth, NH 03801
Phone: 603-422-8208    Fax: 603-422-8219
Mr. Hanad Omar, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 333 Borthwick Avenue, Portsmouth, NH 03801
Phone: 603-436-5110    
Thomas P Clairmont Jr., MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 330 Borthwick Ave, Suite 205, Portsmouth, NH 03801
Phone: 603-436-6115    Fax: 603-433-5567
Daniel L Davies, DO
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 155 Borthwick Ave, Suite 202w, Portsmouth, NH 03801
Phone: 603-433-8434    Fax: 603-436-6608
Brian Choi, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 333 Borthwick Ave, Portsmouth, NH 03801
Phone: 215-442-5031    
Dr. Sucharit Suresh Joshi, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 875 Greenland Rd, #c-10, Portsmouth, NH 03801
Phone: 603-436-3433    Fax: 603-427-5115
Dr. Michael Casimir Danielski, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 875 Greenland Rd, #c-10, Portsmouth, NH 03801
Phone: 603-436-3433    Fax: 603-427-5115

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.