Quick answers
- Where does William Peterson see patients?
- Medicare's clinician data lists 2 practice locations, including Bel Air, MD. Call before your visit to confirm the address.
- What is William Peterson's specialty?
- Medicare lists Mental Health Counselor as the primary specialty.
- Does William Peterson accept Medicare assignment?
- Yes. Medicare's clinician data says William Peterson 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 Peterson?
- (410) 877-2341, as listed in official Medicare / NPI Registry data.
- What is William Peterson's NPI number?
- 1245813641. 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 Peterson is enrolled with Medicare (CMS data updated 2026-10-02).
- 120 S Hays StBel Air, MD 21014 (410) 877‑2341
- 802 Baltimore Pike, Suite ABel Air, MD 21014 (443) 643‑3464
Group practices
Medicare enrollment lists William Peterson as a member of these groups (CMS data updated 2026-10-02).
- Harford Crisis Center Inc20 clinicians in the group
- Harford County Health Department14 clinicians in the group
Specialties
- Mental Health Counselorprimary
Other mental health counselors in Bel Air
Clinicians with the same Medicare primary specialty in Bel Air, MD — not a recommendation.
Clinician information
| Graduation year | 2015 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245813641 |
| 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