Mary Margaret Lewis, MD
NPI 1487645750 · Critical Care Medicine (Internal Medicine) Physician · Richmond, VA
Enrolled with Medicare as Practitioner - Critical Care (intensivists) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Margaret Lewis, MD is a Critical Care Medicine (Internal Medicine) Physician provider in Richmond, VA (NPI 1487645750).
Provider details
- NPI number
- 1487645750
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- MD22025 (DC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
5 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
124 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 59 | $225 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 34 | $126 |
| Critical Care, Each Additional 30 Minutes99292 | 31 | $114 |
Typical Medicare-allowed amounts for these services range $114–$225 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (4)
- 110 Irving St NwRm 4b42Washington, DC 20010-2976Phone: (202) 877-7259Fax: (202) 877-7258
- 8600 Old Georgetown RdBethesda, MD 20814-1422Phone: (301) 896-3990
- 500 W Annandale RdFalls Church, VA 22046-4205Phone: (703) 521-6662Fax: (703) 521-5991
- 1755 N Mecklenburg AveSouth Hill, VA 23970-4080Phone: (434) 447-3151Fax: (434) 584-5449
Registry dates
- Enumerated
- 2005-11-04
- Last updated
- 2025-10-01
- Certified
- 2025-10-01
Frequently asked questions
- What is Mary Margaret Lewis's NPI number?
- Mary Margaret Lewis's National Provider Identifier (NPI) is 1487645750, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Margaret Lewis's specialty?
- Mary Margaret Lewis is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Margaret Lewis located?
- Mary Margaret Lewis's practice location on file with NPPES is 1213 E Clay St, Richmond, VA 23298-5071.
- What is Mary Margaret Lewis's phone number?
- The practice phone number listed in the NPPES registry for Mary Margaret Lewis is (804) 828-9071.
- Does Mary Margaret Lewis accept Medicare?
- Mary Margaret Lewis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Margaret Lewis's NPI active?
- Yes — Mary Margaret Lewis's NPI (1487645750) is active in the NPPES registry as of the last update on 2025-10-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.