Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mary Margaret Lewis, MD

Individual provider Critical Care Medicine (Internal Medicine) Physician · NPI 1487645750

Mary Margaret Lewis, MD is registered under Critical Care (Intensivists) in Richmond, Virginia. Graduated from Georgetown University School of Medicine in 1995, 31 years ago. Practices with Mcv Associated Physicians, a 1,767-clinician group, works from 5 locations and accepts Medicare assignment. Licensed in District of Columbia, Maryland and Virginia.

Years since qualifying
31
Trained at
Georgetown University School of Medicine
Licensed in
DC, MD, VA
In the registry since
2005
Specialties on file
5
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1213 E Clay St
Richmond, VA 23298-5071
Phone: (804) 828-9071
Fax: (804) 828-2578
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (4)

  • 110 Irving St Nw, Washington, DC 20010-2976 — (202) 877-7259
  • 8600 Old Georgetown Rd, Bethesda, MD 20814-1422 — (301) 896-3990
  • 500 W Annandale Rd, Falls Church, VA 22046-4205 — (703) 521-6662
  • 1755 N Mecklenburg Ave, South Hill, VA 23970-4080 — (434) 447-3151

Specialties & licences

Critical Care Medicine (Internal Medicine) Physician (primary) Taxonomy 207RC0200X · Licence D0096549 (MD)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence MD22025 (DC)
Pulmonary Disease Physician Taxonomy 207RP1001X · Licence 0101054875 (VA)
Sleep Medicine (Internal Medicine) Physician Taxonomy 207RS0012X · Licence 0101054875 (VA)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence 0101054875 (VA)

Record details

NPI number1487645750
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 4, 2005
Last updated in NPPESOctober 1, 2025
Certification dateOctober 1, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCRITICAL CARE (INTENSIVISTS)
Also practisesPULMONARY DISEASE
Medical schoolGEORGETOWN UNIVERSITY SCHOOL OF MEDICINE
Graduated 1995 (31 years in practice)
Group practice McV Associated Physicians — 1767 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients73
Services billed 149 a service is one billed item, such as a visit, a test or a procedure
Average patient age79

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Mcv Associated Physicians

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1767 clinicians in the practice; 12 are shown here.

Other providers in Richmond