Quick answers
- Which hospitals does John Downs work at?
- Medicare's official clinician data lists John Downs at 3 hospitals: MedStar Georgetown University Hospital, MedStar Montgomery Medical Center and WellSpan York Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Downs see patients?
- Medicare's clinician data lists 5 practice locations, including Washington, DC, Glen Burnie, MD and Olney, MD. Call before your visit to confirm the address.
- What is John Downs's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does John Downs accept Medicare assignment?
- Yes. Medicare's clinician data says John Downs 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.
- Does John Downs offer telehealth?
- Medicare's clinician data says John Downs offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John Downs?
- (202) 429-2401, as listed in official Medicare / NPI Registry data.
- What is John Downs's NPI number?
- 1093780496. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John Downs works
Medicare's Facility Affiliation Data lists John Downs at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- MedStar Georgetown University HospitalWashington, DC · Acute Care Hospital · CCN 090004
- MedStar Montgomery Medical CenterOlney, MD · Acute Care Hospital · CCN 210018
- WellSpan York HospitalYork, PA · Acute Care Hospital · CCN 390046
Practice locations
Addresses where John Downs is enrolled with Medicare (CMS data updated 2026-10-02).
- 1145 19th St NW, 311 Mmg at 19th Street NWWashington, DC 20036 (202) 429‑2401
- 1406 Crain S Hwy 106Glen Burnie, MD 21061 (410) 768‑6440
- 18101 Prince Philip DrOlney, MD 20832 (301) 570‑7404
- 18105 Prince Philip DrOlney, MD 20832 (301) 774‑8962
- 7501 Surratts RdClinton, MD 20735 (301) 877‑7353
Group practices
Medicare enrollment lists John Downs as a member of this group (CMS data updated 2026-10-02).
- MedStar Medical Group II LLC3,767 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Find other Hematology/Oncology doctors in District of Columbia →
Other hematologist-oncologists in Washington
Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of Ny Upstate Medical University |
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1093780496 |
| 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