Dr. Diane Clausen MD is a board certified in Medical Oncology and Hematology in East Setauket, New York. She is affiliated with multiple hospitals in the area including Brookhaven Memorial Hospital Medical Center and John T. Mather Memorial Hospital. Dr. Clausen also holds a position as Assistant Professor of Medicine at Stony Brook Medical Center and has affiliations with John T. Mather Memorial Hospital, St. Charles Hospital, and St. Catherine of Sienna Medical Center.


Years Experience: 29

Procedures Performed

Dr. Clausen's Education & Training

Medical School
The School Of Medicine At Stony Brook University Medical Center,The School Of Medicine At Stony Brook University Medical Center; Graduated 1990


  • Overall Rating

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    Explains conditions & treatments

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    Takes time to answer my questions

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    Provides follow-up as needed

Dr. Clausen's Accepted Insurance

Please verify insurance information directly with your doctor's office as it may change frequently.

Insurance Plans

  • Aetna Choice POS II
  • Aetna HMO
  • Aetna Managed Choice POS Open Access
  • Aetna Signature Administrators PPO
  • Affinity Essential Qualified Health Plans

Dr. Clausen's Office Information & Appointments


New York Cancer & Blood Specialists (NYCBS)

235 N Belle Mead Ave
East Setauket, NY 11733

Get Directions

Tel: (631) 886-4254

Fax: (631) 751-0506

Practice Website: nycancer.com/doctors/Dr_Regina_Jablonski

Accepting New Patients: Yes

Medicare Accepted: Yes

Medicaid Accepted: Yes

M 8:30 AM - 5:00 PM
T 8:30 AM - 5:00 PM
W 8:30 AM - 5:00 PM
T 8:30 AM - 5:00 PM
F 8:30 AM - 5:00 PM
S 8:00 AM - 1:00 PM
S 8:00 AM - 1:00 PM

Other Physicians in Dr. Clausen's Practice