Ranil Gajanayaka, MD

Nephrology

EDUCATION

  • M.P.H., California State University, Los Angeles, CA
  • M.D., University of Colombo, Colombo, Sri Lanka

Internship/Residency

  • Internal Medicine, Danbury Hospital, Danbury, CT

Fellowships

  • Mayo Clinic, Rochester, MN
  • Yale New Haven Hospital, New Haven, CT

BOARD CERTIFIED

  • Internal Medicine
  • Nephrology

ORGANIZATIONS/MEMBERSHIPS

  • American Society of Nephrology
  • International Society of Nephrology
  • International Society of Peritoneal Dialysis
  • American Medical Association
  • Dallas County Medical Society
  • Renal Physicians Association
  • Texas Medical Association

LANGUAGES

  • English
  • Tamil
  • Sinhala

To schedule an appointment with Dr. Gajanayaka, call Dallas Nephrology today at 214-358-2300 or contact us via our convenient online form.

Patient Ratings & Comments

4.8 / 5
323 reviews

Detailed Ratings

4.9
Friendliness/courtesy of CP
4.8
Likelihood of recommending this provider
4.8
Provider discussed treatment options
4.8
Provider explained things clearly
4.8
Provider showed concern
4.8
Provider included you in decisions

Comments also are gathered from our Patient Satisfaction Survey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

  • Jan 24, 2026

    I have been a patient of Dr G for several years. He always gives me suggestions about my care.

  • Jan 19, 2026

    Excellent

  • Jan 18, 2026

    Great experience as always.

  • Jan 17, 2026

    Dr. G is a Godsend; he heard my concerns when other doctors dismissed me. He diagnosed and got me to the right specialist, which saved my life. I will/would recommend him 100 times over!!

  • Jan 2, 2026

    Explains cause

  • Nov 19, 2025

    None everything is good.

4.8 / 5
323 reviews