Quick answers
- Where does William Loeliger see patients?
- Medicare's clinician data lists 2 practice locations, including Westminster, MD and Rockville, MD. Call before your visit to confirm the address.
- What is William Loeliger's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does William Loeliger accept Medicare assignment?
- Yes. Medicare's clinician data says William Loeliger 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 Loeliger?
- (410) 843-2203, as listed in official Medicare / NPI Registry data.
- What is William Loeliger's NPI number?
- 1376544130. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where William Loeliger is enrolled with Medicare (CMS data updated 2026-10-02).
- 826 Washington RdWestminster, MD 21157 (410) 843‑2203
- 9901 Medical Ctr DrRockville, MD 20850 (240) 826‑7324
Group practices
Medicare enrollment lists William Loeliger as a member of this group (CMS data updated 2026-10-02).
- First Colonies Anesthesia Associates, LLC326 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Westminster
Clinicians with the same Medicare primary specialty in Westminster, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Jefferson Medical College Of Thomas Jefferson University |
| Graduation year | 1980 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1376544130 |
| 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
- 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