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Dr. Mark McDonald, a neurologist based in Smithtown, NY, practices with St Catherine of Siena Medical Center.

About Dr. McDonald's practice

Specialty
Neurologist
Credentials
MD
Practice
St Catherine of Siena Medical Center
Address
50 Route 25a, Smithtown, NY 11787
Phone
(631) 862-3000
Other locations
4295 Hempstead Tpke, Bethpage, NY 11714; 1000 Montauk Hwy, West Islip, NY 11795
Medical school
University of Texas Medical School at Houston (2015)
Medicare assignment
Accepts
Telehealth
Available
NPI number
1366837429

He graduated from University of Texas Medical School at Houston in 2015, which means 11 years have passed since medical school.

St Catherine of Siena Medical Center's Smithtown location at 50 Route 25a, Smithtown, NY 11787 is where Dr. McDonald sees patients — appointments by phone at (631) 862-3000. Other listed locations: 4295 Hempstead Tpke, Bethpage, NY 11714; 1000 Montauk Hwy, West Islip, NY 11795. St Catherine of Siena Medical Center is a large group — 98 clinicians are enrolled with Medicare under it. He accepts Medicare assignment — useful to know if you are on traditional Medicare. Video (telehealth) appointments are listed as an option.

Reviews here come only from patients. If you've seen Dr. McDonald, add yours.

Medicare, Medicaid and hospitals

New York Medicaid
Enrolled fee-for-service provider since 2020. Medicaid managed-care plans keep their own networks, so check with your plan.
Hospital pages
AdventHealth Orlando · Morton Plant Hospital · Naples Community Hospital

Comparing neurologists? See 7 in Smithtown or 127 across Long Island.

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Frequently Asked Questions

With St Catherine of Siena Medical Center, at 50 Route 25a, Smithtown, NY 11787.

Call the office at (631) 862-3000.

Yes — Dr. McDonald accepts Medicare assignment, taking the Medicare-approved amount as full payment for covered services.

University of Texas Medical School at Houston, graduating in 2015.

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