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Additional information about Phelps physicians may be obtained by calling Phelps Physician Referral Service: 914-366-3367.


Owen J. O’Neill, M.D., F.U.H.M.
Owen J. O’Neill, M.D., F.U.H.M.

Primary Practice
777 North Broadway
Suite 310
Sleepy Hollow, NY 10591
(914) 366-6665

Board Certified:  American College of Hyperbaric Medicine (Undersea & Hyperbaric Medicine)

Other Credentials:  American Professional Wound Care Association (Certified Wound Specialist)

Specialty:  Hyperbaric Medicine,Internal Medicine

Additional Languages:  Spanish


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Kathryn Oehler, M.D.
Kathryn Oehler, M.D.

Primary Practice
Hudson Valley Pediatrics, P.C.
537 North State Road
Briarcliff Manor, NY 10510
(914) 941-2129

Board Certified:  Pediatrics

Specialty:  Pediatrics

Additional Languages:  Spanish


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Stanley Oiseth, M.D.
Stanley Oiseth, M.D.

Primary Practice
Phelps Memorial Hospital – Department of Pathology
701 North Broadway
Sleepy Hollow, NY 10591
(914) 366-3901

Board Certified:  Pathology

Specialty:  Pathology

Additional Languages:  Italian, German


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Deborah Okoniewski, F.N.P.
Deborah Okoniewski, F.N.P.

Primary Practice:
Phelps Medical Associates
465 North State Road
Briarcliff Manor, NY 10510
(914) 762-5810

Other Credentials:  Certified Adult Nurse Practitioner

Specialty:  Nurse Practitioner


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Henry Orchier, D.M.D.
Henry Orchier, D.M.D.

Primary Practice
245 North Broadway
Suite 105
Sleepy Hollow, NY 10591
(914) 631-5454

Specialty:  Dentistry

Additional Languages:  Spanish


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