Quick answers
- Which hospitals does David M. Kochnower work at?
- Medicare's official clinician data lists David M. Kochnower at 2 hospitals: John T Mather Memorial Hospital of Port Jefferson and St Catherine of Siena Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does David M. Kochnower see patients?
- Medicare's clinician data lists 3 practice locations, including West Islip, NY, Smithtown, NY and Port Jefferson, NY. Call before your visit to confirm the address.
- What is David M. Kochnower's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does David M. Kochnower accept Medicare assignment?
- Yes. Medicare's clinician data says David M. Kochnower 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 David M. Kochnower?
- (516) 705-2689, as listed in official Medicare / NPI Registry data.
- What is David M. Kochnower's NPI number?
- 1922654938. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where David M. Kochnower works
Medicare's Facility Affiliation Data lists David M. Kochnower at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- John T Mather Memorial Hospital of Port JeffersonPort Jefferson, NY · Acute Care Hospital · CCN 330185
- St Catherine of Siena HospitalSmithtown, NY · Acute Care Hospital · CCN 330401
Practice locations
Addresses where David M. Kochnower is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 Montauk HwyWest Islip, NY 11795 (516) 705‑2689
- 50 Route 25aSmithtown, NY 11787 (631) 862‑3000
- 75 N Country RdPort Jefferson, NY 11777
Group practices
Medicare enrollment lists David M. Kochnower as a member of these groups (CMS data updated 2026-10-02).
- Samaritan Medical Services PC354 clinicians in the group
- John T Mather Memorial Hospital175 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in West Islip
Clinicians with the same Medicare primary specialty in West Islip, NY — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1922654938 |
| 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