Quick answers
- Which hospitals does Aaron Charniak work at?
- Medicare's official clinician data lists Aaron Charniak at 2 hospitals: Greater Baltimore Medical Center and MedStar Montgomery Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Aaron Charniak see patients?
- Medicare's clinician data lists 13 practice locations, including Washington, DC, Olney, MD and Towson, MD. Call before your visit to confirm the address.
- What is Aaron Charniak's specialty?
- Medicare lists Hospitalist as the primary specialty, and also Internal Medicine.
- Does Aaron Charniak accept Medicare assignment?
- Yes. Medicare's clinician data says Aaron Charniak 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 Aaron Charniak?
- (202) 429-2401, as listed in official Medicare / NPI Registry data.
- What is Aaron Charniak's NPI number?
- 1063827350. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Aaron Charniak works
Medicare's Facility Affiliation Data lists Aaron Charniak at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Greater Baltimore Medical CenterBaltimore, MD · Acute Care Hospital · CCN 210044
- MedStar Montgomery Medical CenterOlney, MD · Acute Care Hospital · CCN 210018
Practice locations
Addresses where Aaron Charniak is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 13; the Medicare profile lists all.
- 1145 19th St NW, 311 Mmg at 19th Street NWWashington, DC 20036 (202) 429‑2401
- 18101 Prince Philip DrOlney, MD 20832 (301) 570‑7404
- 18105 Prince Philip DrOlney, MD 20832 (301) 774‑8962
- 3701 N Charles St, South Chapman Building Suite 102Towson, MD 21204
- 6565 N Charles StBaltimore, MD 21204
Group practices
Medicare enrollment lists Aaron Charniak as a member of these groups (CMS data updated 2026-10-02).
- MedStar Medical Group II LLC3,767 clinicians in the group
- Greater Baltimore Medical Center354 clinicians in the group
Specialties
- Hospitalistprimary
- Internal Medicinealso
Other hospitalists in Washington
Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2014 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1063827350 |
| 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