4.9
13 Ratings with 4 written Reviews
Summary
Dr. Diane Clausen is an oncologist and internal medicine physician who brings 36 years of experience to cancer care and comprehensive internal medicine. She earned her medical degree from Renaissance School of Medicine at Stony Brook University, establishing a strong foundation in both oncology and internal medicine practices. Dr. Clausen serves patients in both English and Spanish.
Dr. Clausen practices at Saint Catherine of Siena Medical Center in Smithtown, New York, and Stony Brook University Hospital in Stony Brook, New York, with hospital affiliations that also include Mather Hospital. Her extensive experience in oncology allows her to provide specialized cancer treatment and coordinate comprehensive care plans for patients facing complex diagnoses. Patients consistently rate her highly, giving her an average rating of 4.9 out of 5 stars.
Dr. Clausen practices at Saint Catherine of Siena Medical Center in Smithtown, New York, and Stony Brook University Hospital in Stony Brook, New York, with hospital affiliations that also include Mather Hospital. Her extensive experience in oncology allows her to provide specialized cancer treatment and coordinate comprehensive care plans for patients facing complex diagnoses. Patients consistently rate her highly, giving her an average rating of 4.9 out of 5 stars.
Overview based on verified provider data
Quick Facts
- 36 years of experience
- speaks English, Spanish
- Renaissance School Of Medicine At Stony Brook University
- 4 written reviews
- 2 specialties
- 14 areas of expertise
- 2 board certifications
- 3 hospital affiliations
- 2 office locations
- Female
Patients’ Perspective
- Gave an accurate diagnosis
- Had a good bedside manner
- Spent time with me
Based on patient feedback. Read the reviews
Office Locations
Dr. Diane M Clausen has 2 locationsCompare with Similar Doctors
 |  |  |  |
| Dr. Diane M Clausen, MD | Janice Shen, MD | Arlyn Apollo, MD | Sarah J. Schweber, MD |
| Oncology | Oncology | Oncology | Oncology |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | |
| 36 Years of Experience | 10 Years of Experience | 26 Years of Experience | 21 Years of Experience |
| No Virtual Visit Option | Virtual Visit Available | Virtual Visit Available | Virtual Visit Available |
| Speaks English, Spanish | Speaks Chinese, English | Speaks English | Speaks English |
| Smithtown , NY | Commack , NY | Uniondale , NY | Commack , NY |
| Med School: Renaissance School Of Medicine At Stony Brook University | Med School: SUNY Downstate Medical Center | Med School: Mount Sinai School of Medicine | Med School: SUNY Downstate College of Medicine |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. Diane M Clausen
Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.
Medical Specialties
Dr. Diane M Clausen has the following 2 specialties
Specialty Expertise
Dr. Diane M Clausen has the following 14 areas of expertise
Certifications, License, & Education
36 Years Experience
Dr. Diane M Clausen holds an active medical license in the state of New York.
Medical License
Medical Doctor with an active medical license in the state of New York that expires in 2027.
Education & Training
Medical School
Graduated from Renaissance School Of Medicine At Stony Brook University in 1990.
NPI Number
Dr. Clausen's NPI number is 1447256995.
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Frequently Asked Questions
- What languages does Dr. Diane Clausen speak?
- Dr. Diane Clausen speaks English and Spanish.
- Where is Dr. Diane Clausen's office located?
- Dr. Diane Clausen's office is located at 50 Route 25a, Smithtown, NY, 11787.
- Which hospitals is Dr. Diane Clausen affiliated with?
- Dr. Diane Clausen is affiliated with Mather Hospital, Saint Catherine Of Siena Medical Center, and STONY BROOK UNIVERSITY HOSPITAL.
- How can I make an appointment with Dr. Diane Clausen?
- You can find contact information for Dr. Diane Clausen here on Vitals.
- Does Dr. Diane Clausen accept my insurance?
- You can see the insurance plans that Dr. Diane Clausen accepts on their Vitals profile.
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