Ruth A Ross-mccormack, MD - Medicare Internal Medicine in Arlington, MA

Ruth A Ross-mccormack, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Arlington, Massachusetts. She went to Bowman Gray School Of Medicine Of Wake Forest University and graduated in 1990 and has 29 years of diverse experience with area of expertise as Internal Medicine. She is a member of the group practice Lahey Clinic Inc and her current practice location is 37 Broadway, Lahey Arlington, Arlington, Massachusetts. You can reach out to her office (for appointments etc.) via phone at (781) 641-0100.

Ruth A Ross-mccormack is licensed to practice in Massachusetts (license number 77649) 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 1295835833.

Contact Information

Ruth A Ross-mccormack, MD
37 Broadway, Lahey Arlington,
Arlington, MA 02474-5552
(781) 641-0100
(781) 744-7132

Map and Direction




Physician's Profile

Full NameRuth A Ross-mccormack
GenderFemale
SpecialityInternal Medicine
Experience29 Years
Location37 Broadway, Arlington, Massachusetts
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:
  • Ruth A Ross-mccormack attended and graduated from Bowman Gray School Of Medicine Of Wake Forest University in 1990
  NPI Data:
  • NPI Number: 1295835833
  • Provider Enumeration Date: 09/24/2006
  • Last Update Date: 10/30/2012
  Medicare PECOS Information:
  • PECOS PAC ID: 0749221174
  • Enrollment ID: I20050517000131

Medical Identifiers

Medical identifiers for Ruth A Ross-mccormack such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1295835833NPI-NPPES
3141161MedicaidMA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology 77649 (Massachusetts)Primary

Hospital Affiliation

Hospital NameLocationType
Lahey Hospital & Medical Center, BurlingtonBurlington, MAAcute Care Hospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Lahey Clinic Inc22643365281065

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. Ruth A Ross-mccormack allows following entities to bill medicare on her 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. Ruth A Ross-mccormack 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
Ruth A Ross-mccormack, MD
Lahey Clinic, 41 Mall Road,
Burlington, MA 01805-0001

Ph: (781) 764-1010
Ruth A Ross-mccormack, MD
37 Broadway, Lahey Arlington,
Arlington, MA 02474-5552

Ph: (781) 641-0100

Reviews and Comments

Internal Medicine Doctors in Arlington, MA

Ronald P. Criscitiello, M.D
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 37 Broadway, Arlington, MA 02474
Phone: 781-641-0100    Fax: 978-663-6716
Dr. Timothy Crowley, MD
Gastroenterology
Medicare: Not Enrolled in Medicare
Practice Location: 22 Mill St, Ste 208, Arlington, MA 02476
Phone: 781-646-2848    Fax: 781-643-4308
Robert Bruce Liberman, MD
Gastroenterology
Medicare: Not Enrolled in Medicare
Practice Location: 37 Broadway, Arlington, MA 02474
Phone: 781-744-5100    
Mark A Sullivan, M.D.
Gastroenterology
Medicare: Not Enrolled in Medicare
Practice Location: 37 Broadway, Lahey Arlington, Arlington, MA 02474
Phone: 781-641-0100    Fax: 781-744-7132
Dr. Anne Virginia Laraia, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 22 Mill St, Suite 310, Arlington, MA 02476
Phone: 781-643-0500    Fax: 781-648-8509
David M Desimone, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 305 Massachusetts Ave, Arlington, MA 02474
Phone: 781-648-3646    Fax: 781-643-6072

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.