Dr Margaret I Stewart, MD - Medicare Dermatology in Portsmouth, NH

Dr Margaret I Stewart, MD is a medicare enrolled "Dermatology" physician in Portsmouth, New Hampshire. Her current practice location is 155 Borthwick Ave, Suite 201 West, Portsmouth, New Hampshire. You can reach out to her office (for appointments etc.) via phone at (603) 433-9575.

Dr Margaret I Stewart is licensed to practice in New Hampshire (license number 11839) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1649375072.

Contact Information

Dr Margaret I Stewart, MD
155 Borthwick Ave, Suite 201 West,
Portsmouth, NH 03801-7156
(603) 433-9575
(603) 430-0104

Map and Direction




Physician's Profile

Full NameDr Margaret I Stewart
GenderFemale
SpecialityDermatology
Location155 Borthwick Ave, Portsmouth, New Hampshire
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1649375072
  • Provider Enumeration Date: 09/13/2006
  • Last Update Date: 10/18/2017
  Medicare PECOS Information:
  • PECOS PAC ID: 0446141808
  • Enrollment ID: I20060213000161

Medical Identifiers

Medical identifiers for Dr Margaret I Stewart such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1649375072NPI-NPPES
J19743OtherMABCBS MASSACHUSETTS
P00366953OtherNHRAILROAD MEDICARE
403898OtherMATUFTS
01Y004640NH01OtherNHANTHEM NEW HAMPSHIRE
2457634OtherMAAETNA
022071OtherMEANTHEM MAINE
401347OtherMAHARVARD
P00126157OtherMARAILROAD MEDICARE

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207N00000XDermatology 159113 (Massachusetts)Secondary
207N00000XDermatology 11839 (New Hampshire)Primary

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 Margaret I Stewart allows following entities to bill medicare on her behalf.
Entity NameNortheast Dermatology Associates Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1508061839
PECOS PAC ID: 3072403799
Enrollment ID: O20060105000473

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 Margaret I Stewart 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 Margaret I Stewart, MD
280 Merrimack St Ste 311,
Lawrence, MA 01843-1779

Ph: (978) 691-5690
Dr Margaret I Stewart, MD
155 Borthwick Ave, Suite 201 West,
Portsmouth, NH 03801-7156

Ph: (603) 433-9575

Reviews and Comments


Dermatology Doctors in Portsmouth, NH

James G. Dinulos, M.D.
Dermatology
Medicare: Accepting Medicare Assignments
Practice Location: 330 Borthwick Ave, Suite 303, Portsmouth, NH 03801
Phone: 603-431-5205    Fax: 603-436-4257
Andrew E Werchniak, MD
Dermatology
Medicare: Accepting Medicare Assignments
Practice Location: 330 Borthwick Ave Ste 303, Seacoast Dermatology Pllc, Portsmouth, NH 03801
Phone: 603-431-5205    Fax: 603-436-4257
Mr. Ian M Rosenthal, MD
Dermatology
Medicare: Medicare Enrolled
Practice Location: 111 New Hampshire Ave Ste 3, Portsmouth, NH 03801
Phone: 603-988-0951    Fax: 603-441-3722
Hagger Ali, MD
Dermatology
Medicare: Accepting Medicare Assignments
Practice Location: 330 Borthwick Ave Ste 303, Portsmouth, NH 03801
Phone: 603-431-5205    
Dr. Arthur Marka, MD
Dermatology
Medicare: Medicare Enrolled
Practice Location: 330 Borthwick Ave Ste 303, Portsmouth, NH 03801
Phone: 603-431-5205    Fax: 603-436-4257
Molly Beth Chartier, M.D.
Dermatology
Medicare: Accepting Medicare Assignments
Practice Location: 155 Borthwick Ave, Suite 201 West, Portsmouth, NH 03801
Phone: 978-462-0574    Fax: 978-463-0964

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.