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Specialties
Patient Rating
4.9 /5( out of 13 reviews )The patient rating score is an average of all responses on our patient experience survey. The rating averages scores for all questions about care from our providers.
The scale on which responses are measured is 1 to 5 with 5 being the best score.
Patient Comments
Patient comments are gathered from our patient experience survey and displayed in their entirety.
Patients are de-identified for confidentiality and patient privacy.September 18, 2024UH HOSPITALS AND CLINICSNirupama and Taylor work really well together. The fact that they seem to agree on everything is very reassuring to me.
April 17, 2024UH HOSPITALS AND CLINICSDr. Ramkumar always takes time to listen, to share information, and to explain things in a way that I can follow and in which I can participate.
April 02, 2024UH HOSPITALS AND CLINICSAn excellent physician with a friendly manner
January 31, 2024UH HOSPITALS AND CLINICSShe was very friendly and helpful treating me with respect and caring.
January 09, 2024UH HOSPITALS AND CLINICSI trust her clinical judgment and appreciate her warm manner
December 05, 2023UH HOSPITALS AND CLINICSA smart and caring physician
November 22, 2023UH HOSPITALS AND CLINICSShe was thorough and very nice, answering my questions. I would like to see her again.
August 23, 2023UH HOSPITALS AND CLINICSVery professional and friendly from beginning to end.
July 13, 2023UH HOSPITALS AND CLINICSIt was all good
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Board Certification and Academic Information
Academic Departments Internal Medicine -Primary Academic Divisions Nephrology & Hypertension
Education history
Fellowship Nephrology - University of Utah Fellow Internal Medicine - UCSF-Fresno Resident Internship Family Medicine - UCSF-Fresno Intern Public Health - University of Utah M.P.H. Professional Medical Medicine - Bangalore University M.B.B.S. Selected Publications
Journal Article
- Agarwal A, Beddhu S, Boucher R, Rao V, Ramkumar N, Rodan AR, Fang J, Wynne BM, Drakos SG, Hanff T, Cheung AK, Fang JC (2024). Evaluation of renal sodium handling in heart failure with preserved ejection fraction: A pilot study. Physiol Rep, 12(9), e16033. (Read full article)
- Rubin M, Lecker SH, Ramkumar N, Sozio SM, Hoover RS Jr, Zeidel ML, Ko BS (2024). American Society of Nephrology Kidney Tutored Research and Education for Kidney Scholars (TREKS) Program: A 10-Year Interim Analysis. J Am Soc Nephrol. (Read full article)
- Sarwal A, Abraham D, Kethineni R, Ramkumar N, Abraham J (2022). Acute kidney injury, necrotizing pancreatitis and nephrocalcinosis: A rare presentation of primary hyperparathyroidism. Am J Med Sci, 365(3), 313-314. (Read full article)
- Xu C, Chen Y, Ramkumar N, Zou CJ, Sigmund CD, Yang T (2022). Collecting duct renin regulates potassium homeostasis in mice. Acta Physiol (Oxf), 237(1), e13899. (Read full article)
- Stuart D, Peterson CS, Hu C, Revelo MP, Huang Y, Kohan DE, Ramkumar N (2022). Lack of renoprotective effects of targeting the endothelin A receptor and (or) sodium glucose transporter 2 in a mouse model of Type 2 diabetic kidney disease. Can J Physiol Pharmacol, 100(8), 763-771. (Read full article)
- Pyrshev K, Khayyat NH, Stavniichuk A, Tomilin VN, Zaika O, Ramkumar N, Pochynyuk O (2022). ClC-K2 Cl(-) channel allows identification of A- and B-type of intercalated cells in split-opened collecting ducts. FASEB J, 36(5), e22275. (Read full article)
- Ramkumar N, Stuart D, Peterson CS, Hu C, Wheatley W, Min Cho J, Symons JD, Kohan DE (2021). Loss of Soluble (Pro)renin Receptor Attenuates Angiotensin-II Induced Hypertension and Renal Injury. Circ Res, 129(1), 50-62. (Read full article)
- Nicholson RJ, Ramkumar N, Summers SA (2021). Gain of 'FAOnction', Loss of Fibrosis. Trends Endocrinol Metab, 32(6), 333-334. (Read full article)
- Al-Rabadi LF, Caza T, Trivin-Avillach C, Rodan AR, Andeen N, Hayashi N, Williams B, Revelo MP, Clayton F, Abraham J, Lin E, Liou W, Zou CJ, Ramkumar N, Cummins T, Wilkey DW, Kawalit I, Herzog C, Storey A, Edmondson R, Sjoberg R, Yang T, Chien J, Merchant M, Arthur J, Klein J, Larsen C, Beck LH Jr (2021). Serine Protease HTRA1 as a Novel Target Antigen in Primary Membranous Nephropathy. J Am Soc Nephrol, 32(7), 1666-1681. (Read full article)
- Cho ME, Sweeney C, Fino N, Greene T, Ramkumar N, Huang Y, Ricardo AC, Shafi T, Deo R, Anderson A, Mills KT, Cheung AK, CRIC Study Investigators (2021). Longitudinal Changes in Prorenin and Renin in the Chronic Renal Insufficiency Cohort. Am J Nephrol, 52(2), 141-151. (Read full article)
- Lazaro-Guevara J, Fierro-Morales J, Wright AH, Gunville R, Simeone C, Frodsham SG, Pezzolesi MH, Zaffino CA, Al-Rabadi L, Ramkumar N, Pezzolesi MG (2021). Targeted Next-Generation Sequencing Identifies Pathogenic Variants in Diabetic Kidney Disease. Am J Nephrol, 52(3), 239-249. (Read full article)
- Lakshmipathi J, Gao Y, Hu C, Stuart D, Genzen J, Ramkumar N, Kohan DE (2020). Nephron-Specific Disruption of Polycystin-1 Induces Cyclooxygenase-2-Mediated Blood Pressure Reduction Independent of Cystogenesis. J Am Soc Nephrol, 31(6), 1243-1254. (Read full article)
- Nelson MD, Ramkumar N, Gale BK (2019). Flexible, transparent, sub-100 um microfluidic channels with FDM 3D-printed thermoplastic polyurethane . J Micromech Microeng, 29(095010).
- Wang F, Xu C, Luo R, Peng K, Ramkumar N, Xie S, Lu X, Zhao L, Zuo CJ, Kohan DE, Yang T (2019). Site-1 protease-derived soluble (pro)renin receptor targets vasopressin receptor 2 to enhance urine concentrating capability. JCI Insight, 4(7). (Read full article)
- Ramkumar N, Stuart D, Mironova E, Abraham N, Gao Y, Wang S, Lakshmipathi J, Stockand JD, Kohan DE (2018). Collecting duct principal, but not intercalated, cell prorenin receptor regulates renal sodium and water excretion. Am J Physiol Renal Physiol, 315(3), F607-F617. (Read full article)
- Quadri SS, Culver S, Ramkumar N, Kohan DE, Siragy HM (2018). (Pro)Renin receptor mediates obesity-induced antinatriuresis and elevated blood pressure via upregulation of the renal epithelial sodium channel. PLoS One, 13(8), e0202419. (Read full article)
- Ramkumar N, Stuart D, Abraham N, Kohan DE (2018). Nephron prorenin receptor deficiency alters renal medullary endothelin-1 and endothelin receptor expression. Physiol Res, 67(Suppl 1), S127-S136. (Read full article)
- Ramkumar N, Stuart D, Yang T, Kohan DE (2016). Aldosterone does not alter endothelin B receptor signaling in the inner medullary collecting duct. Physiol Rep, 5(5). (Read full article)
- Ramkumar N, Gao Y, Kohan DE (2017). Characterization of flow-regulated cortical collecting duct endothelin-1 production. Physiol Rep, 5(4). (Read full article)
- Song K, Stuart D, Abraham N, Wang F, Wang S, Yang T, Sigmund CD, Kohan DE, Ramkumar N (2016). Collecting Duct Renin Does Not Mediate DOCA-Salt Hypertension or Renal Injury. PLoS One, 11(7), e0159872. (Read full article)
- Ramkumar N, Stuart D, Mironova E, Bugay V, Wang S, Abraham N, Ichihara A, Stockand JD, Kohan DE (2016). Renal tubular epithelial cell prorenin receptor regulates blood pressure and sodium transport. Am J Physiol Renal Physiol, 311(1), F186-94. (Read full article)
- Ramkumar N, Stuart D, Calquin M, Wang S, Niimura F, Matsusaka T, Kohan DE (2016). Possible role for nephron-derived angiotensinogen in angiotensin-II dependent hypertension. Physiol Rep, 4(1).
- Ramkumar N, Stuart D, Calquin M, Wang S, Niimura F, Matsusaka T, Kohan DE (2016). Possible role for nephron-derived angiotensinogen in angiotensin-II dependent hypertension . Physiol Rep, 4(1), e12675.
- Ramkumar N, Stuart D, Calquin M, Quadri S, Wang S, Van Hoek AN, Siragy HM, Ichihara A, Kohan DE (2015). Nephron-specific deletion of the prorenin receptor causes a urine concentration defect. Am J Physiol Renal Physiol, 309(1), F48-56. (Read full article)
- Ramkumar N, Stuart D, Rees S, Hoek AV, Sigmund CD, Kohan DE (2014). Collecting duct-specific knockout of renin attenuates angiotensin II-induced hypertension. Am J Physiol Renal Physiol, 307(8), F931-8. (Read full article)
- Ramkumar N, Ying J, Stuart D, Kohan DE (2013). Overexpression of Renin in the collecting duct causes elevated blood pressure. Am J Hypertens, 26(8), 965-72. (Read full article)
- Ramkumar N, Kohan DE (2013). Role of collecting duct renin in blood pressure regulation. Am J Physiol Regul Integr Comp Physiol, 305(2), R92-4. (Read full article)
- Ramkumar N, Stuart D, Ying J, Kohan DE (2013). A possible interaction between systemic and renal angiotensinogen in the control of blood pressure. Am J Hypertens, 26(4), 473-80. (Read full article)
- Roos KP, Bugaj V, Mironova E, Stockand JD, Ramkumar N, Rees S, Kohan DE (2013). Adenylyl cyclase VI mediates vasopressin-stimulated ENaC activity. J Am Soc Nephrol, 24(2), 218-27. (Read full article)
- Ying J, Stuart D, Hillas E, Gociman BR, Ramkumar N, Lalouel JM, Kohan DE (2012). Overexpression of mouse angiotensinogen in renal proximal tubule causes salt-sensitive hypertension in mice. Am J Hypertens, 25(6), 684-9. (Read full article)
- Hawkes CH, Ramkumar N, Baker R, Lyon JL (2007). Multiple sclerosis in Latter Day Saints (Mormons). Acta Neurol Scand, 115(4), 260-4. (Read full article)
- Ramkumar N, Murtaugh MA, Cheung AK, Beddhu S (2007). Lack of synergistic effects of metabolic syndrome and plasma fibrinogen on coronary events and mortality in moderate CKD. Am J Kidney Dis, 49(3), 356-64. (Read full article)
- Beddhu S, Ramkumar N, Pappas LM (2005). Normalization of protein intake by body weight and the associations of protein intake with nutritional status and survival. J Ren Nutr, 15(4), 387-97. (Read full article)
- Beddhu S, Kimmel PL, Ramkumar N, Cheung AK (2005). Associations of metabolic syndrome with inflammation in CKD: results From the Third National Health and Nutrition Examination Survey (NHANES III). Am J Kidney Dis, 46(4), 577-86. (Read full article)
- Ramkumar N, Pappas LM, Beddhu S (2005). Effect of body size and body composition on survival in peritoneal dialysis patients. Perit Dial Int, 25(5), 461-9. (Read full article)
- Ramkumar N, Beddhu S, Eggers P, Pappas LM, Cheung AK (2005). Patient preferences for in-center intense hemodialysis. Hemodial Int, 9(3), 281-95. (Read full article)
- Morris D, Samore MH, Pappas LM, Ramkumar N, Beddhu S (2005). Nutrition and racial differences in cardiovascular events and survival in elderly dialysis patients. Am J Med, 118(6), 671-5. (Read full article)
- Logar CM, Pappas LM, Ramkumar N, Beddhu S (2005). Surgical revascularization versus amputation for peripheral vascular disease in dialysis patients: a cohort study. BMC Nephrol, 6, 3. (Read full article)
- Ramkumar N, Cheung AK, Pappas LM, Roberts WL, Beddhu S (2004). Association of obesity with inflammation in chronic kidney disease: a cross-sectional study. J Ren Nutr, 14(4), 201-7. (Read full article)
- Beddhu S, Pappas LM, Ramkumar N, Samore MH (2004). Malnutrition and atherosclerosis in dialysis patients. J Am Soc Nephrol, 15(3), 733-42. (Read full article)
- Beddhu S, Pappas LM, Ramkumar N, Samore M (2003). Effects of body size and body composition on survival in hemodialysis patients. J Am Soc Nephrol, 14(9), 2366-72. (Read full article)
- Beddhu S, Samore MH, Roberts MS, Stoddard GJ, Ramkumar N, Pappas LM, Cheung AK (2003). Impact of timing of initiation of dialysis on mortality. J Am Soc Nephrol, 14(9), 2305-12. (Read full article)
Review
- Van Beusecum JP, Rianto F, Teakell J, Kon V, Sparks MA, Hoorn EJ, Kirabo A, Ramkumar N (2022). Novel Concepts in Nephron Sodium Transport: A Physiological and Clinical Perspective. [Review]. Adv Kidney Dis Health, 30(2), 124-136. (Read full article)
- Lin H, Geurts F, Hassler L, Batlle D, Mirabito Colafella KM, Denton KM, Zhuo JL, Li XC, Ramkumar N, Koizumi M, Matsusaka T, Nishiyama A, Hoogduijn MJ, Hoorn EJ, Danser AHJ (2022). Kidney Angiotensin in Cardiovascular Disease: Formation and Drug Targeting. [Review]. Pharmacol Rev, 74(3), 462-505. (Read full article)
- Ramkumar N, Kohan DE (2019). The (pro)renin receptor: emerging player in hypertension and metabolic syndrome . [Review]. Kidney Int, 95(5), 1041-1052.
- Ramkumar N, Kohan DE (2016). The nephron (pro)renin receptor: function and significance. [Review]. Am J Physiol Renal Physiol, 311(6), F1145-1148.
- Ramkumar N, Kohan DE (2016). Role of the collecting duct renin angiotensin system in regulation of blood pressure and renal function. [Review]. Curr Hypertens Rep, 18(4), 29.
- Ramkumar N, Kohan DE (2013). Proximal tubule angiotensinogen modulation of arterial pressure . [Review]. Curr Opin Nephrol Hypertens, 22(1), 32-36.
Book Chapter
- Sarwal A, Ramkumar N (). Genetic disorders of sodium transport. . In Sparks, Lerma, Topf (Eds.), Nephrology Secrets (5th edition). Elsevier.
Editorial
- Nicholson RJ, Ramkumar N, Rodan AR (2024). Megalin as a Metabolic Modulator in the Kidney and Beyond. Function (Oxf), 5(5). (Read full article)
- Ramkumar N (2024). Dopamine D(4) receptor regulates kidney sodium transport and blood pressure. Hypertens Res. (Read full article)
- Ramkumar N, Tomacruz IDV, Phachu D, Sparks MA (2023). Physiology Is Fundamental to Patient Care and Research Advances in Nephrology. Adv Kidney Dis Health, 30(2), 69-70. (Read full article)
- Ramkumar N (2018). Return of the prorenin receptor: a novel role in macula dense signaling . 315(4), F913-914.
Letter
- Beddhu S, Ramkumar N, Samore MH (2005). The paradox of the "body mass index paradox" in dialysis patients: associations of adiposity with inflammation. [Letter to the editor]. Am J Clin Nutr, 82(4), 909-10; author reply 910-11. (Read full article)
- Beddhu S, Pappas LM, Ramkumar N, Samore MH (2005). Body mass index and survival in incident dialysis patients: the answer depends on the question. [Letter to the editor]. Am J Clin Nutr, 81(2), 534-6; author reply 536. (Read full article)
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