Meet Our Physicians

Sumit Kumar, M.D.

Nephrology

Dr. Sumit Kumar is a board-certified nephrologist with more than 18 years of experience serving patients with complex kidney problems and hypertension. He trained at the premier nephrology fellowship program in Denver, Colorado and is one of the few trained interventional nephrologists in Dallas-Fort Worth. He has a special interest in treating patients with chronic kidney disease and complex hypertension, electrolyte, and glomerular disorders. Dr. Kumar is actively involved in education and nephrology research, and he advises large corporations about new drug development and technologies to treat kidney disease.

Dr. Kumar ardently believes in “Service before Self,” and the group practices cutting-edge, comprehensive, and compassionate care in a concierge environment. He and his partners are aggressive about preventing the progression of chronic kidney disease using the latest strategies and state-of-the art technology. Dr. Kumar says, “I listen intently to my patients and do my best to make things less complicated. Kidney disease can be very serious, so I strive to be reassuring and compassionate while guiding them through their options.”

Awards
Best Doctor in Dallas County in 2015, 2016, 2017, 2019, 2020, and 2021 for areas of Nephrology and Hypertension
Best Doctor in Collin County in 2018 for areas of Nephrology and Hypertension

Education
M.D., All India Institute of Medical Sciences; Internship, Residency, and Fellowship,
SUNY Health Science Center and University of Colorado Health Science Center

Clinic Schedule
Dallas: Tuesday, Wednesday, Thursday

Shaun Kaiser, M.D.

Nephrology

Dr. Shaun Kaiser is board certified in both nephrology and internal medicine with special interest in nutrition. Having been a registered dietitian for over 18 years, part of that working with dialysis patients, he grew especially fond of caring for those suffering kidney disease.

After receiving his Masters Degree in Exercise Science and Performance from the University of Houston, he graduated from Ross University School of Medicine in 2007. Dr. Kaiser completed his internal medicine residency and nephrology training in 2012 from Indiana University.

Dr. Kaiser has been part of Texas Kidney Institute since 2013. He is passionate about treating patients with CKD. Dr. Kaiser believes in preventive care and works with patients to come up with strategies to prevent progression of CKD.

Traveling, his fondest hobby, Dr. Kaiser has recently worked both domestic and abroad, prior to settling down here in Dallas with his wife and family.

In addition to nutrition, special interests included community education, electrolyte disturbances and critical care.

Clinic Schedule
Dallas: Monday
Richardson: Wednesday

Krishna Pakkivenkata, M.D.

Nephrology

Dr. Krishna Pakkivenkata is board certified in both nephrology and internal medicine. After receiving his medical degree from Andhra medical college in India in 1999, he joined Royal College of Physicians to pursue his post doctoral training and graduated in 2004. Dr. Krishna completed his internal medicine residency in 2009 from North Shore Medical Center in Salem, MA and Nephrology training in 2011 from University of Florida.

Dr. Krishna has been part of Texas Kidney Institute since 2012. He is passionate about treating patients with kidney disease. Dr. Kaiser’s patients have immense trust in his ability and like the way he takes time to patiently explain the diagnosis and the treatment plan.

Clinic Schedule
Forney: Wednesday 8:30am- 12:00 pm
Kaufman: Monday
Sunnyvale: Tuesday, Friday

Surachit Kumar, M.D.

Nephrology

Dr. Surachit Kumar is board certified in both nephrology and internal medicine. After receiving his medical degree in 2004 from University College of Medical Sciences in India, he joined Conemaugh Valley Memorial Hospital in Johnston Pennsylvania to pursue his post doctoral training and completed his internal medicine residency in 2012. Dr. Kumar completed his Nephrology fellowship in 2015 from University of Arkansas for Medical Sciences in Little Rock, Arkansas.

Dr. Kumar has been part of Texas Kidney Institute since 2015. He enjoys working with his patients and strategizing to ensure not only their conditions are treated but continuous preventive care is in place.

Dr. Kumar enjoys travelling, biking and watching movies.

Clinic Schedule
Richardson: Monday
Rowlett: Tuesday
North Garland: Wednesday
Rockwall: Friday

Dr. Vivek Sharma, MD

Nephrology

Dr. Vivek Sharma is a board Certified physician in Internal Medicine. He completed his Medical degree from B J Medical College, University of Pune in India. He graduated in Internal Medicine from York Hospital, Pennsylvania in 2010. He went on to join as an Internist at a San Juan Regional Medical Center, in Farmington, New Mexico. In his role as an Internist, he gained valuable experience in working with kidney and critically sick patients. Subsequently, He joined Texas Kidney Institute in August 2020, after completing his fellowship training In Nephrology in June 2020 from Baylor Scott and White,Temple,TX.

He has special interest in preventing CKD progression, Electrolyte Disorders and caring for patients with Hypertension. A compassionate individual, with his motto of ‘Service to Mankind is Service to God’, brings empathy and medical flair to the fore while caring deeply for his patients. He is a nature lover, an avid cyclist and enjoys regular excursions with his friends and family.

Clinic Schedule
West Plano: 2nd Monday
North Plano: 3rd Monday
East Plano: Tuesday

Dr. Rebecca Rojas, MD

Nephrology and Transplant Medicine

Dr. Rebecca Rojas, MD, is a Nephrology specialist in Dallas, Texas. She attended and graduated from Boston University School Of Medicine in 2002, having over 19 years of diverse experience, especially in Nephrology and Transplant Nephrology. She was affiliated with many hospitals including Parkland Health And Hospital System, Ut Southwestern University Hospital. She completed her transplant nephrology training at the University of Chicago in 2007.

Clinic Schedule
Dallas: Fridays

Elisha Shelton, MPAS, MS-CRM, PA-C

Nephrology

Elisha Shelton, MPAS, MS-CRM, PA-C earned her Bachelor of Science degree in 2000 from Texas Tech University in Lubbock, Texas. After graduation, she worked from 2001-2005 as a clinical research coordinator at Dallas Nephrology Associates. In 2005, she began a dual Master’s degree program the University of North Texas Health Science Center in Fort Worth where she graduated in 2008 with a Masters of Physician Assistant Studies and Masters of Clinical Research Management.

In 2008, she received her professional certification from the National Commission on Certification of Physician Assistants (NCCPA) as well as her Texas Physician Assistants Board License. From 2008-2017, she worked as a PA and Clinical Research Coordinator at Endocrine Associates of Dallas. She joined the Texas Kidney Institute practice as part of the Nephrotex Research Group in February 2015 as a Clinical Research Manager and Sub-Investigator prior to joining the practice in the scope of Physician Assistant in July 2017.

Elisha has co-authored several abstracts related to nephrology and hypertension and received the Outstanding Poster presentation award in 2008 from the American Academy of Nephrology Physician Assistants (AANPA). In addition to being a member of several professional associations, Elisha is a member of Pi Alpha National Honor Society of Physician Assistants.

Elisha enjoys engaging with her patients to ensure they receive they receive the best care possible as well as understand their disease state and treatment. She also enjoys her role in clinical research as her research perspective complements her clinical skills and knowledge when treating her patients.

In her free time, Elisha loves to spend time with her husband and two children. She also enjoys exploring new places to eat in the DFW area, traveling the US and visiting her hometown.

Clinic Schedule
Dallas: Friday 9:30am – 1:30pm

Dolly Varghese, NP

Family Nurse Practicioner

Dolly Susan Varghese earned her Bachelor’s in Science and Nursing from Bangalore, India in the year 1998 and further pursued her education to receive Master’s in Nursing in 2013 from University of Phoenix. She joined South University, Georgia and completed her Post Masters Nurse Practitioner in Family practice in the year 2018.

Dolly has immense experience in the Nephrology Nursing which spans over 18 years. Her main goal is to provide excellent care to the patients. She believes in gaining trust of the patients and establish long lasting relationships while rendering service with love and respect.