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
386 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.

  • Jun 27, 2026

    Dr. Gajanayaka is a wonderful Nephrologist!!

  • Jun 9, 2026

    I was very impressed with 'Dr. G.'. Very kind, listened to me, and my concerns, and answered my questions.

  • Jun 1, 2026

    Dr G answered to all my questions with concerns.

  • May 18, 2026

    Keep doing what you are doing- it is working

  • Apr 25, 2026

    Wonderful visit as usual

  • Apr 21, 2026

    Liked by who we referred to him.

4.8 / 5
386 reviews