Quick answers
- Which hospitals does Juan F. Lessmann work at?
- Medicare's official clinician data lists Juan F. Lessmann at 3 hospitals: North Shore University Hospital, Ns/Lij HS Huntington Hospital and Plainview Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Juan F. Lessmann see patients?
- Medicare's clinician data lists 1 practice location in Huntington, NY. Call before your visit to confirm the address.
- What is Juan F. Lessmann's specialty?
- Medicare lists General Surgery as the primary specialty, and also Colorectal Surgery (Proctology).
- Does Juan F. Lessmann accept Medicare assignment?
- Yes. Medicare's clinician data says Juan F. Lessmann 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 Juan F. Lessmann?
- (917) 515-7819, as listed in official Medicare / NPI Registry data.
- What is Juan F. Lessmann's NPI number?
- 1861647463. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Juan F. Lessmann works
Medicare's Facility Affiliation Data lists Juan F. Lessmann at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- North Shore University HospitalManhasset, NY · Acute Care Hospital · CCN 330106
- Ns/Lij HS Huntington HospitalHuntington, NY · Acute Care Hospital · CCN 330045
- Plainview HospitalPlainview, NY · Acute Care Hospital · CCN 330331
Practice locations
Addresses where Juan F. Lessmann is enrolled with Medicare (CMS data updated 2026-10-02).
- 119 Woodbury RdHuntington, NY 11743 (917) 515‑7819
Specialties
Other general surgeons in Huntington
Clinicians with the same Medicare primary specialty in Huntington, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1861647463 |
| 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