Quick answers
- Which hospitals does William M. Garneau work at?
- Medicare's official clinician data lists William M. Garneau at 1 hospital: The Johns Hopkins Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William M. Garneau see patients?
- Medicare's clinician data lists 1 practice location in Baltimore, MD. Call before your visit to confirm the address.
- What is William M. Garneau's specialty?
- Medicare lists Hospitalist as the primary specialty, and also Addiction Medicine and Internal Medicine.
- Does William M. Garneau accept Medicare assignment?
- Yes. Medicare's clinician data says William M. Garneau 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 William M. Garneau?
- (410) 955-5000, as listed in official Medicare / NPI Registry data.
- What is William M. Garneau's NPI number?
- 1629431796. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William M. Garneau works
Medicare's Facility Affiliation Data lists William M. Garneau at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- The Johns Hopkins HospitalBaltimore, MD · Acute Care Hospital · CCN 210009
Practice locations
Addresses where William M. Garneau is enrolled with Medicare (CMS data updated 2026-10-02).
- 600 N Wolf StBaltimore, MD 21287 (410) 955‑5000
Group practices
Medicare enrollment lists William M. Garneau as a member of this group (CMS data updated 2026-10-02).
- Johns Hopkins University713 clinicians in the group
Specialties
- Hospitalistprimary
- Addiction Medicinealso
- Internal Medicinealso
Other hospitalists in Baltimore
Clinicians with the same Medicare primary specialty in Baltimore, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of North Carolina At Chapel Hill School Of Medicine |
| Graduation year | 2016 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1629431796 |
| 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