Quick answers
- Which hospitals does Alyssa S. Williams work at?
- Medicare's official clinician data lists Alyssa S. Williams at 1 hospital: Calverthealth Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Alyssa S. Williams see patients?
- Medicare's clinician data lists 1 practice location in Prince Frederick, MD. Call before your visit to confirm the address.
- What is Alyssa S. Williams's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Alyssa S. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Alyssa S. Williams 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 Alyssa S. Williams?
- (410) 938-3367, as listed in official Medicare / NPI Registry data.
- What is Alyssa S. Williams's NPI number?
- 1528601036. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Alyssa S. Williams works
Medicare's Facility Affiliation Data lists Alyssa S. Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Calverthealth Medical CenterPrince Frederick, MD · Acute Care Hospital · CCN 210039
Practice locations
Addresses where Alyssa S. Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 Hospital RdPrince Frederick, MD 20678 (410) 938‑3367
Group practices
Medicare enrollment lists Alyssa S. Williams as a member of this group (CMS data updated 2026-10-02).
- Sheppard Pratt Physicians PA67 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Prince Frederick
Clinicians with the same Medicare primary specialty in Prince Frederick, MD — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1528601036 |
| 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