Quick answers
- Which hospitals does Steven J. Mason work at?
- Medicare's official clinician data lists Steven J. Mason at 2 hospitals: Greater Baltimore Medical Center and Physicians Regional Medical Center - Pine Ridge. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Steven J. Mason see patients?
- Medicare's clinician data lists 6 practice locations, including Baltimore, MD, Towson, MD and Naples, FL. Call before your visit to confirm the address.
- What is Steven J. Mason's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Internal Medicine.
- Does Steven J. Mason accept Medicare assignment?
- Medicare's clinician data says Steven J. Mason may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for Steven J. Mason?
- (410) 502-4340, as listed in official Medicare / NPI Registry data.
- What is Steven J. Mason's NPI number?
- 1366445603. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Steven J. Mason works
Medicare's Facility Affiliation Data lists Steven J. Mason 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
- Physicians Regional Medical Center - Pine RidgeNaples, FL · Acute Care Hospital · CCN 100286
Practice locations
Addresses where Steven J. Mason is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 4940 Eastern AveBaltimore, MD 21224
- 600 N Wolf StBaltimore, MD 21287
- 600 N Wolfe St, Blalock 266Baltimore, MD 21287 (410) 502‑4340
- 6701 N Charles StBaltimore, MD 21204 (443) 849‑2000
- 6701 N Charles StTowson, MD 21204 (443) 849‑8989
Group practices
Medicare enrollment lists Steven J. Mason as a member of these groups (CMS data updated 2026-10-02).
- Johns Hopkins University2,909 clinicians in the group
- Naples Heart Rhythm Specialists PA20 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Maryland →
Other cardiologists in Baltimore
Clinicians with the same Medicare primary specialty in Baltimore, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 1972 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1366445603 |
| 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