Quick answers
- Where does Leonard N. Chen see patients?
- Medicare's clinician data lists 1 practice location in Washington, DC. Call before your visit to confirm the address.
- What is Leonard N. Chen's specialty?
- Medicare lists Pathology as the primary specialty.
- Does Leonard N. Chen accept Medicare assignment?
- Yes. Medicare's clinician data says Leonard N. Chen 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 Leonard N. Chen?
- (202) 877-7000, as listed in official Medicare / NPI Registry data.
- What is Leonard N. Chen's NPI number?
- 1548688336. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Leonard N. Chen is enrolled with Medicare (CMS data updated 2026-10-02).
- 110 Irving St NWWashington, DC 20010 (202) 877‑7000
Group practices
Medicare enrollment lists Leonard N. Chen as a member of this group (CMS data updated 2026-10-02).
- MedStar Medical Group II LLC3,767 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Washington
Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Georgetown University School Of Medicine |
| Graduation year | 2005 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548688336 |
| 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
- 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