Quick answers
- Which hospitals does Sean M. McWilliams work at?
- Medicare's official clinician data lists Sean M. McWilliams at 3 hospitals: HCA Florida Twin Cities Hospital, Sacred Heart Hospital and Sacred Heart Hospital on the Emerald Coast. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Sean M. McWilliams see patients?
- Medicare's clinician data lists 1 practice location in Boca Raton, FL. Call before your visit to confirm the address.
- What is Sean M. McWilliams's specialty?
- Medicare lists Otolaryngology as the primary specialty.
- Does Sean M. McWilliams accept Medicare assignment?
- Yes. Medicare's clinician data says Sean M. McWilliams 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 Sean M. McWilliams?
- (561) 391-3333, as listed in official Medicare / NPI Registry data.
- What is Sean M. McWilliams's NPI number?
- 1003854803. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Sean M. McWilliams works
Medicare's Facility Affiliation Data lists Sean M. McWilliams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- HCA Florida Twin Cities HospitalNiceville, FL · Acute Care Hospital · CCN 100054
- Sacred Heart HospitalPensacola, FL · Acute Care Hospital · CCN 100025
- Sacred Heart Hospital on the Emerald CoastMiramar Beach, FL · Acute Care Hospital · CCN 100292
Practice locations
Addresses where Sean M. McWilliams is enrolled with Medicare (CMS data updated 2026-10-02).
- 900 NW 13th St, Suite 206Boca Raton, FL 33486 (561) 391‑3333
Group practices
Medicare enrollment lists Sean M. McWilliams as a member of this group (CMS data updated 2026-10-02).
- Ent and Allergy Associates of Florida, LLC229 clinicians in the group
Specialties
- Otolaryngologyprimary
Other ENT doctors in Boca Raton
Clinicians with the same Medicare primary specialty in Boca Raton, FL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tulane University School Of Medicine |
| Graduation year | 1999 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1003854803 |
| 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