MARY MARGARET LEWIS (MD) – Critical Care Medicine (Internal Medicine) Physician, NPI 1487645750
Critical Care Medicine (Internal Medicine) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
Provider Addresses for MARY MARGARET LEWIS (MD)
500, West Annandale Road, Tyler Gardens, Hillwood, Falls Church, Fairfax County, Virginia, 22046, United States
FALLS CHURCH, VA 220464205
Phone: (703) 521-6662
Fax: (703) 521-5991
Type: Mailing
110 Irving St NW
Rm 4B42
Washington, DC 200102976
Phone: (202) 877-7259
Fax: (202) 877-7258
Type: Location
8600 Old Georgetown Rd
Bethesda, MD 208141422
Phone: (301) 896-3990
Type: Location
500 W Annandale Rd
Falls Church, VA 220464205
Phone: (703) 521-6662
Fax: (703) 521-5991
Type: Location
1755 N Mecklenburg Ave
South Hill, VA 239704080
Phone: (434) 447-3151
Fax: (434) 584-5449
Type: Location
1213 E CLAY ST
RICHMOND, VA 232985071
Phone: (804) 828-9071
Fax: (804) 828-2578
Type: Location
PO BOX 780125
PHILADELPHIA, PA 191780125
Phone: (804) 922-4844
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2025-05-23
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Past revalidation due date
Earliest CMS due date was 2023-09-30 (981 days ago).
Enrollment records
3
Earliest due date
2023-09-30
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20040920000237 | I | Critical Care (Intensivists) | DC | TBD |
| I20140905000079 | I | Critical Care (Intensivists) | VA | 2023-09-30 |
| I20250523002098 | I | Critical Care (Intensivists) | MD | TBD |
What to do next
- Verify current status on the CMS Revalidation Lookup Tool immediately.
- Complete revalidation in PECOS or contact your Medicare Administrative Contractor (MAC).
- Overdue revalidation can lead to deactivation of Medicare billing privileges.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99291 | Critical care, first 30-74 minutes | 153 | 96 | $0 |
| 99292 | Critical care, each additional 30 minutes | 56 | 33 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 53 | 46 | $0 |
Insurance plans in this area (ZIP 22046)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| CRITICAL CARE (INTENSIVISTS) | VA | 36556 | Insertion of central venous catheter for infusion, patient 5 years or older | 19 | 18 |
| CRITICAL CARE (INTENSIVISTS) | VA | 94727 | Determination of lung volumes using gas dilution or washout | 21 | 21 |
| CRITICAL CARE (INTENSIVISTS) | VA | 95811 | Sleep monitoring of patient (6 years or older) in sleep lab with continued pressured respiratory assistance by mask or breathing tube | 29 | 29 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine | VA | |
| - | VA | |
| Nurse Practitioner | VA | |
| Orthopedic Surgery | VA | |
| O T O L A R Y N G O L O G Y | VA | |
| Diagnostic Radiology | VA | |
| Nurse Practitioner | VA | |
| Qualified Audiologist | VA | |
| Radiation Oncology | VA | |
| O T O L A R Y N G O L O G Y | VA |
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