Dr. John G. Knecht III, MD

Oncology & Hematology

Personal Statement:

Dr. Knecht believes in an evidence-based and multi-disciplinary approach to the care of cancer patients. He treats all solid tumors, as well as diagnosing and treating multiple types of blood disorders and hematologic malignancies. He treats all adult patients, but he has a special interest in geriatric oncology and palliative care. Being from the local community offers Dr. Knecht a unique insight into his patient’s lives.

Board Certifications:

  • American Board of Internal Medicine
  • Medical Oncology


  • Oncology and Hematology of South Texas
  • University of Texas Medical Branch, Medical Oncology
  • University of Texas Medical Branch, Internal Medicine

Hospital Affiliations:

  • Houston Methodist St. John Hospital
  • Kindred Healthcare Hospital – Clear Lake
  • Memorial Hermann Southeast
  • Clear Lake Regional Medical Center
  • Kindred Rehabilitation Hospital
  • Cornerstone Hospital

Education Background:

  • University of Texas Medical Branch Medical Oncology
  • University of Texas Medical Branch Internal Medicine
  • Georges University, Grenada, West Indies, MD
  • University of Texas at Austin Bachelors of Arts, Microbiology


  • Travel Grant Award Recipient- 10th Annual Symposium on Gastrointestinal Cancer, St. Louis, MO


  • English
  • Spanish

Clinic Hours

Monday – Friday 8:00 am – 5:00 pm

Lunch Break 12:00 pm – 1:00 pm

Sat – Sun Closed

Oncology & Hematology

600 N. Kobayashi Rd., Suite 310
Webster, TX 77598

7111 Medical Center Dr., Suite 109
Texas City, TX 77591