Quick answers
- Which hospitals does Lewis Diamond work at?
- Medicare's official clinician data lists Lewis Diamond at 1 hospital: Children's National Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Lewis Diamond see patients?
- Medicare's clinician data lists 1 practice location in Washington, DC. Call before your visit to confirm the address.
- What is Lewis Diamond's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Lewis Diamond accept Medicare assignment?
- Yes. Medicare's clinician data says Lewis Diamond accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Lewis Diamond?
- (301) 572-3514, as listed in official Medicare / NPI Registry data.
- What is Lewis Diamond's NPI number?
- 1811253263. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Lewis Diamond works
Medicare's Facility Affiliation Data lists Lewis Diamond at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Children's National HospitalWashington, DC · Children's Hospital · CCN 093300
Practice locations
Addresses where Lewis Diamond is enrolled with Medicare (CMS data updated 2026-10-02).
- 111 Michigan Ave NWWashington, DC 20010 (301) 572‑3514
Group practices
Medicare enrollment lists Lewis Diamond as a member of this group (CMS data updated 2026-10-02).
- Children's Hospital212 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Washington
Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1811253263 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians