Quick answers
- Which hospitals does Casey S. Sullivan work at?
- Medicare's official clinician data lists Casey S. Sullivan at 1 hospital: Meritus Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Casey S. Sullivan see patients?
- Medicare's clinician data lists 2 practice locations, including Hagerstown, MD and Frederick, MD. Call before your visit to confirm the address.
- What is Casey S. Sullivan's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Casey S. Sullivan accept Medicare assignment?
- Yes. Medicare's clinician data says Casey S. Sullivan 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.
- Does Casey S. Sullivan offer telehealth?
- Medicare's clinician data says Casey S. Sullivan offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Casey S. Sullivan?
- (301) 733-0300, as listed in official Medicare / NPI Registry data.
- What is Casey S. Sullivan's NPI number?
- 1457015372. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Casey S. Sullivan works
Medicare's Facility Affiliation Data lists Casey S. Sullivan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Meritus Medical CenterHagerstown, MD · Acute Care Hospital · CCN 210001
Practice locations
Addresses where Casey S. Sullivan is enrolled with Medicare (CMS data updated 2026-10-02).
- 12821 Oak Hill AveHagerstown, MD 21742 (301) 733‑0300
- 604 Solarex Ct, Unit 207Frederick, MD 21703 (240) 439‑4344
Group practices
Medicare enrollment lists Casey S. Sullivan as a member of this group (CMS data updated 2026-10-02).
- Medical Practices of Antietam, LLC234 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Hagerstown
Clinicians with the same Medicare primary specialty in Hagerstown, MD — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2021 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1457015372 |
| 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