Mary-margaret Lewis, MD - Medicare Critical Care (intensivists) in Falls Church, VA

Mary-margaret Lewis, MD is a medicare enrolled "Internal Medicine - Critical Care Medicine" physician in Falls Church, Virginia. She went to Georgetown University School Of Medicine and graduated in 1995 and has 29 years of diverse experience with area of expertise as Critical Care (intensivists). She is a member of the group practice Privia Medical Group Llc and her current practice location is 500 W Annandale Rd, Falls Church, Virginia. You can reach out to her office (for appointments etc.) via phone at (703) 521-6662.

Mary-margaret Lewis is licensed to practice in Virginia (license number 0101054875) 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 1487645750.

Contact Information

Mary-margaret Lewis, MD
500 W Annandale Rd,
Falls Church, VA 22046-4205
(703) 521-6662
(703) 521-5991

Map and Direction




Physician's Profile

Full NameMary-margaret Lewis
GenderFemale
SpecialityCritical Care (intensivists)
Experience29 Years
Location500 W Annandale Rd, Falls Church, Virginia
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:
  • Mary-margaret Lewis attended and graduated from Georgetown University School Of Medicine in 1995
  NPI Data:
  • NPI Number: 1487645750
  • Provider Enumeration Date: 11/04/2005
  • Last Update Date: 10/20/2017
  Medicare PECOS Information:
  • PECOS PAC ID: 9234107145
  • Enrollment ID: I20040920000237

Medical Identifiers

Medical identifiers for Mary-margaret Lewis such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1487645750NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RP1001XInternal Medicine - Pulmonary Disease 0101054875 (Virginia)Secondary
207RS0012XInternal Medicine - Sleep Medicine 0101054875 (Virginia)Secondary
207RC0200XInternal Medicine - Critical Care Medicine 0101054875 (Virginia)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Virginia Hospital CenterArlington, VAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Privia Medical Group Llc43856820611176

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. Mary-margaret Lewis allows following entities to bill medicare on her behalf.
Entity NamePrivia Medical Group Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1013042480
PECOS PAC ID: 4385682061
Enrollment ID: O20050422000298

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. Mary-margaret Lewis 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
Mary-margaret Lewis, MD
500 W Annandale Rd,
Falls Church, VA 22046-4205

Ph: (703) 521-6662
Mary-margaret Lewis, MD
500 W Annandale Rd,
Falls Church, VA 22046-4205

Ph: (703) 521-6662

Reviews and Comments


Internal Medicine Doctors in Falls Church, VA

Amita Rajani, M.D.
Critical Care Medicine
Medicare: Medicare Enrolled
Practice Location: 3300 Gallows Road Inova Fairfax Medical Campus, Department Of Medicine, Npt-2, Falls Church, VA 22042
Phone: 703-776-7780    
Dr. Mary Beck O'donnell, M.D.
Critical Care Medicine
Medicare: Medicare Enrolled
Practice Location: 2960 Sleepy Hollow Rd, Falls Church, VA 22044
Phone: 703-536-2000    Fax: 703-536-4256
Lindsey A. Cilia, M.D.
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 2901 Telestar Ct Ste 200, Falls Church, VA 22042
Phone: 703-573-3494    Fax: 703-573-5353
Chin Hee Kim, MD
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 3300 Gallows Rd Dept Of, Falls Church, VA 22042
Phone: 703-776-3582    
Candyce Heather Greene, MD, MPH, MSW
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 3300 Gallows Rd, Falls Church, VA 22042
Phone: 703-776-4001    Fax: 703-776-7113
Dr. Megan Elizabeth Terek, MD
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 3300 Gallows Rd, Falls Church, VA 22042
Phone: 703-776-4001    Fax: 703-776-7113
Dr. Hazim El-haddad, M.D.
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 2901 Telestar Ct Ste 200, Falls Church, VA 22042
Phone: 703-573-3494    Fax: 703-573-5353

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.