30 Harrison St, Ste 320, Johnson City, NY

Medical Staff

Christian D. Tvetenstrand, M. D.

Dr. Tvetenstrand, a graduate of Columbia University (1979) and the University of Medicine & Dentistry of New Jersey, Newark (1983) is one of the most respected surgeons in the North-Eastern United States. Dr. Christian D. Tvetenstrand, M.D. and his talented staff have been revolutionizing health care for over 15 years.

Dr. Tvetenstrand offers each of his patients personalized care. From the moment you walk in the door of our office to the moment you exit, you will know you are in the care of an experienced, professional and compassionate staff.


  • Emergency Medicine
  • General & Bariatric Surgery
  • Medical Training


  • American Board of Surgery
  • ATLS - Trainer
  • ACLS
  • Member, American Society of Metabolic & Bariatric Surgery


  • Columbia University
  • New Jersey Medical School
  • Residency: St. Vincent's Hospital and Medical Center of NY

Peter B. Ojo, M. D.

Dr. Ojo graduated from the University of Ibadan in Nigeria, with his Bachelor of Medicine and Surgery in 1995.

Upon moving to the United States, he finished his medical training at Yale University's School of Medicine in New Haven, Connecticut.


  • General & Bariatric
  • Minimally Invasive Technique


  • American Board of Surgeons
  • ATLS


  • University of Ibadan
  • Yale University
  • Fellowship: Minimally Invasive Surgery at Virginia Commonwealth University

Anishur Rahman, D. O., FASMBS

Dr. Rahman graduated from the NYS College of Osteopathic Medicine in Old Westbury, NY and specializes in General & Bariatric Surgery as well as Colorectal Surgery, Endocrine Surgery, Hernia Repair and Breast Surgery.


  • General & Bariatric Surgery
  • Minimally Invasive Technique


  • General Surgery


  • NYS College of Osteopathic Medicine, Old Westbury, NY
  • Fellowship: St. John Hospital and Medical Center, Saint Clair Shores, MI
  • Specialty Training: St. Barnabas Hospital, Bronx, NY

Contact Us

Phone: 607-763-8205

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MEDENT Patient Portal

Appointments, RX Refills, Lab Results and more.


NOTICE: Bariatric Support Group Meetings will be starting back up beginning 8/12/20 w/ LIMITED SEATING. Please call our office to reserve a seat.