Quick answers
- Which hospitals does Brian Hasselfeld work at?
- Medicare's official clinician data lists Brian Hasselfeld at 2 hospitals: Johns Hopkins Bayview Medical Center and The Johns Hopkins Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Brian Hasselfeld see patients?
- Medicare's clinician data lists 2 practice locations, including Baltimore, MD. Call before your visit to confirm the address.
- What is Brian Hasselfeld's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Pediatric Medicine.
- Does Brian Hasselfeld accept Medicare assignment?
- Yes. Medicare's clinician data says Brian Hasselfeld 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 Brian Hasselfeld?
- (410) 522-9800, as listed in official Medicare / NPI Registry data.
- What is Brian Hasselfeld's NPI number?
- 1700270360. 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 Hasselfeld works
Medicare's Facility Affiliation Data lists Brian Hasselfeld at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Johns Hopkins Bayview Medical CenterBaltimore, MD · Acute Care Hospital · CCN 210029
- The Johns Hopkins HospitalBaltimore, MD · Acute Care Hospital · CCN 210009
Practice locations
Addresses where Brian Hasselfeld is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 E Eager St, E Baltimore Med CtrBaltimore, MD 21202 (410) 522‑9800
- 1501 S Clinton St, Suite 200Baltimore, MD 21224 (410) 522‑9940
Group practices
Medicare enrollment lists Brian Hasselfeld as a member of this group (CMS data updated 2026-10-02).
- Johns Hopkins Community Physicians, Inc763 clinicians in the group
Specialties
- Internal Medicineprimary
- Pediatric Medicinealso
Other internal medicine doctors in Baltimore
Clinicians with the same Medicare primary specialty in Baltimore, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tulane University School Of Medicine |
| Graduation year | 2015 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1700270360 |
| 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