Quick answers
- Which hospitals does Brian J. Masterson work at?
- Medicare's official clinician data lists Brian J. Masterson at 1 hospital: Holy Cross Germantown Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Brian J. Masterson see patients?
- Medicare's clinician data lists 3 practice locations, including Washington, DC, Falls Church, VA and Silver Spring, MD. Call before your visit to confirm the address.
- What is Brian J. Masterson's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Geriatric Psychiatry, Neurology, Neuropsychiatry and Preventive Medicine.
- Does Brian J. Masterson accept Medicare assignment?
- Yes. Medicare's clinician data says Brian J. Masterson 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 Brian J. Masterson offer telehealth?
- Medicare's clinician data says Brian J. Masterson offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Brian J. Masterson?
- (202) 360-4787, as listed in official Medicare / NPI Registry data.
- What is Brian J. Masterson's NPI number?
- 1225062383. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Brian J. Masterson works
Medicare's Facility Affiliation Data lists Brian J. Masterson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Holy Cross Germantown HospitalGermantown, MD · Acute Care Hospital · CCN 210065
Practice locations
Addresses where Brian J. Masterson is enrolled with Medicare (CMS data updated 2026-10-02).
- 1150 Varnum St NEWashington, DC 20017 (202) 360‑4787
- 3300 Gallows RdFalls Church, VA 22042 (703) 776‑4001
- 8040 Georgia Ave, Suite 170Silver Spring, MD 20910 (202) 360‑4787
Group practices
Medicare enrollment lists Brian J. Masterson as a member of these groups (CMS data updated 2026-10-02).
- Inova Health Care Services1,817 clinicians in the group
- Axis Healthcare Group73 clinicians in the group
Specialties
- Internal Medicineprimary
- Geriatric Psychiatryalso
- Neurologyalso
- Neuropsychiatryalso
- Preventive Medicinealso
Find other Internal Medicine doctors in District of Columbia →
Other internal medicine doctors in Washington
Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 1988 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1225062383 |
| 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