Quick answers
- Which hospitals does Daniel M. Birk work at?
- Medicare's official clinician data lists Daniel M. Birk at 3 hospitals: John T Mather Memorial Hospital of Port Jefferson, St Catherine of Siena Hospital and St Charles Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Daniel M. Birk see patients?
- Medicare's clinician data lists 5 practice locations, including West Islip, NY, Riverhead, NY and Smithtown, NY. Call before your visit to confirm the address.
- What is Daniel M. Birk's specialty?
- Medicare lists Neurosurgery as the primary specialty.
- Does Daniel M. Birk accept Medicare assignment?
- Yes. Medicare's clinician data says Daniel M. Birk 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 Daniel M. Birk?
- (631) 500-9400, as listed in official Medicare / NPI Registry data.
- What is Daniel M. Birk's NPI number?
- 1578880274. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Daniel M. Birk works
Medicare's Facility Affiliation Data lists Daniel M. Birk 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
- St Charles HospitalPort Jefferson, NY · Acute Care Hospital · CCN 330246
Practice locations
Addresses where Daniel M. Birk is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 Montauk HwyWest Islip, NY 11795 (631) 500‑9400
- 1175 Montauk Hwy, Suite 3West Islip, NY 11795 (631) 500‑9400
- 1175 Montauk Hwy 3West Islip, NY 11795
- 160 Old Country RdRiverhead, NY 11901 (631) 531‑9400
- 50 Route 25aSmithtown, NY 11787 (631) 500‑9400
Group practices
Medicare enrollment lists Daniel M. Birk as a member of this group (CMS data updated 2026-10-02).
- Nitin Mariwalla MD PLLC12 clinicians in the group
Specialties
- Neurosurgeryprimary
Other neurosurgeons in West Islip
Clinicians with the same Medicare primary specialty in West Islip, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Columbia University College Of Physicians And Surgeons |
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1578880274 |
| 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