Quick answers
- Which hospitals does James Masterson work at?
- Medicare's official clinician data lists James Masterson at 4 hospitals: Luminis Health Anne Arundel Medical Center, Inc, MedStar Southern Maryland Hospital Center, Saint Agnes Hospital and University of MD Capital Region Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does James Masterson see patients?
- Medicare's clinician data lists 3 practice locations, including Silver Spring, MD, Hanover, MD and Largo, MD. Call before your visit to confirm the address.
- What is James Masterson's specialty?
- Medicare lists Urology as the primary specialty.
- Does James Masterson accept Medicare assignment?
- Yes. Medicare's clinician data says James 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.
- What is the phone number for James Masterson?
- (301) 598-9171, as listed in official Medicare / NPI Registry data.
- What is James Masterson's NPI number?
- 1639330889. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where James Masterson works
Medicare's Facility Affiliation Data lists James Masterson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Luminis Health Anne Arundel Medical Center, IncAnnapolis, MD · Acute Care Hospital · CCN 210023
- MedStar Southern Maryland Hospital CenterClinton, MD · Acute Care Hospital · CCN 210062
- Saint Agnes HospitalBaltimore, MD · Acute Care Hospital · CCN 210011
- University of MD Capital Region Medical CenterUpper Marlboro, MD · Acute Care Hospital · CCN 210003
Practice locations
Addresses where James Masterson is enrolled with Medicare (CMS data updated 2026-10-02).
- 3801 International DrSilver Spring, MD 20906 (301) 598‑9171
- 7580 Buckingham Blvd, Suite 100Hanover, MD 21076 (410) 760‑9400
- 950 Harry S Truman Dr N, Fl 5Largo, MD 20774 (301) 321‑1122
Group practices
Medicare enrollment lists James Masterson as a member of this group (CMS data updated 2026-10-02).
- Chesapeake Urology Associates LLC177 clinicians in the group
Specialties
- Urologyprimary
Other urologists in Silver Spring
Clinicians with the same Medicare primary specialty in Silver Spring, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Uniformed Services Uhs Fe Hebert School Of Med |
| Graduation year | 2008 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1639330889 |
| 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