Quick answers
- Which hospitals does Brett Lassen work at?
- Medicare's official clinician data lists Brett Lassen at 1 hospital: St John's Riverside Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Brett Lassen see patients?
- Medicare's clinician data lists 4 practice locations, including Yonkers, NY and Dobbs Ferry, NY. Call before your visit to confirm the address.
- What is Brett Lassen's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Brett Lassen accept Medicare assignment?
- Yes. Medicare's clinician data says Brett Lassen 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 Brett Lassen?
- (914) 966-9296, as listed in official Medicare / NPI Registry data.
- What is Brett Lassen's NPI number?
- 1184668196. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Brett Lassen works
Medicare's Facility Affiliation Data lists Brett Lassen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- St John's Riverside HospitalYonkers, NY · Acute Care Hospital · CCN 330208
Practice locations
Addresses where Brett Lassen is enrolled with Medicare (CMS data updated 2026-10-02).
- 1088 N BroadwayYonkers, NY 10701 (914) 966‑9296
- 128 Ashford AveDobbs Ferry, NY 10522 (914) 693‑6500
- 967 N BroadwayYonkers, NY 10701 (914) 964‑4444
- 967 N Broadway, Fl 5Yonkers, NY 10701 (914) 964‑4631
Group practices
Medicare enrollment lists Brett Lassen as a member of this group (CMS data updated 2026-10-02).
- SJR Medical, PC43 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Yonkers
Clinicians with the same Medicare primary specialty in Yonkers, NY — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1184668196 |
| 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