Quick answers
- Where does John Carroll see patients?
- Medicare's clinician data lists 10 practice locations, including Bethesda, MD, Salisbury, MD and Germantown, MD. Call before your visit to confirm the address.
- What is John Carroll's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does John Carroll accept Medicare assignment?
- Yes. Medicare's clinician data says John Carroll 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 John Carroll?
- (410) 546-3390, as listed in official Medicare / NPI Registry data.
- What is John Carroll's NPI number?
- 1134119902. 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 John Carroll is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 10; the Medicare profile lists all.
- 10215 Fernwood RdBethesda, MD 20817
- 1820 Sweetbay Dr, Suite 102Salisbury, MD 21804 (410) 546‑3390
- 20410 Observation Dr, Suite 106Germantown, MD 20876 (240) 397‑6674
- 21351 Ridgetop Cir, Suite 100Sterling, VA 20166
- 2141 K St NW, Suite 200Washington, DC 20037 (202) 223‑9723
Group practices
Medicare enrollment lists John Carroll as a member of this group (CMS data updated 2026-10-02).
- Washington Radiology Assoc PLLC36 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Bethesda
Clinicians with the same Medicare primary specialty in Bethesda, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Temple University School Of Medicine |
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1134119902 |
| 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