• Neonatology
• Pediatric intensive care
• Pediatric neonatology
• Pediatric Pulmonology
• Development of Pediatric

Currently working as Professor & HoD of the Pediatrician & Neonatology Department at Sharda Hospital Greater Noida, Uttar Pradesh, India.

Past Experience :

• Senor Adviser & Professor at Armed Forces Medical Services Hospitals, Lucknow
   

• MBBS from Guru Gobind Singh Medical College faridkot, Punjab
• MD Pediatrics from Army Hospital, Delhi University

Memberships

• Indian Academy of Pediatrics
• National Neonatology Forum
• IAP Neonatology Chapter
• IAP Disaster Management Group
• IAP ALS BLS Group

NA
Research

• Thapar RK, Saxena A, Devgan A. Congenital Malaria. Medical Journal of Armed Forces India. 2008; 64:185-87
• Devgan A, Thapar RK, Saxena A. Gauchers Disease in two Siblings .Medical Journal of Armed Forces of India . 2008; 64:369-370
• Chopra A, Thapar R, Iyer VK, Singh N: Diffuse multifocal chorioangiomatosis of placenta with multiple intestinal stenosis of the fetus: combination of rare causes for non immune hydrops fetalis. Indian J Pathol Microbiol.2006 Oct; 49 (4): 600-2
• Devgan A, Deepa, Thapar RK. A case of Congenital Diaphragmatic Hernia in a 2yr old child .Pediatric Pulmonology update, Journal of IAP (Respiratory Chapter), 6(1&2);22-24, 2006
• Kannan Venkatnarayan, R K Thapar, Himanshu Sharma. Massive Fetomaternal Hemorrhage. Indian Journal of Clinical Practice.2014 Feb; 24 (09):872-874
• A Saxena, RK Thapar, V Sondhi, P Chandra. Continuous Positive Airway Pressure for Spontaneously Breathing Premature Infants with Respiratory Distress Syndrome. Indian J Pediatr.  2012 Sep; 79(9):1185-1191. 
• Rajeev Thapar, K Venkatnarayan. A case of Biotinidase Deficiency Presenting as Quadriparesis; Asian Journal of Pediatric Practice.2012; 16(1): 23-25. (International)
• Thapar R K, Venkatnarayan K. Umbilical Venous Cannulation. The Child and Newborn. 2012; 16(1&2):21-22.
• Venkatnarayan K, Thapar RK. Surfactant Replacement therapy: Review Article. The Child and Newborn.2012; 16(1&2):17-21.
• Venkatnarayan K, Thapar RK.  Management of Feeding in Low Birth Babies. The Child and Newborn. 2012; 16(3&4):40-44.  
• Bose T, Thapar R K, Venkatnarayan K. Dialysis in Pediatrics Practice. The Child and Newborn.2013; 17(3): 101-05
• Venkatnarayan K, Thapar R K, Bose T. The Neonatal Renal System: Uniqueness, Challenges and Implications. The Child and Newborn.2013; 17(3): 107-09
• Gupta R, Khera S, Thapar R K. Efficacy of 13 –Valent  pneumococcal conjugate vaccine over 7-valent (PCV7). Pediatrics, Sep 19, 2014 (International) Comment Published.
• Thapar R K, Venkatnarayan K. Approach to Respiratory Distress in a child.  The Child and Newborn.2013; 17(4): 157-161 
• Garai S, Venkatnarayan, Thapar R, Bose T. Respiratory Distress in Neonate. The Child and Newborn. 2013: 17(4): 172-179. 
• Venkatnarayan K, Bej PK, Thapar R K. Neonatal Sepsis: A Profile of a Changing Spectrum. J.Nepal Paediatr.Soc.2014; 34 (3):207-214.  
• Gupta R, Bajpai A, Singh RK, Thapar RK. Is Continuous Positive Airway Pressure with Helmet is better device than Mask in Infants with Bronchiolitis?  Re: "Continuous Positive Airway Pressure with Helmet versus Mask in Infants with Bronchiolitis: an RCT" Chidini, et al. Pediatrics 2015, Vol 135 (4). Comment Published May 22, 2015. 135:4 e868 e 875doi: 10. 1542/peds.2014-1142
• Murmu, J., Venkatnarayan, K., Thapar, R. K., Shaw, S. C. and Dalal, S. S. When alternative female Kangaroo care is provided by other immediate postpartum mothers, it reduces post procedural pain in preterm babies more than swaddling. Acta Paediatr 2017; Vol 106 (3):  411–415.   doi:10.1111/apa.13716
• Dhakhane Y, Singh RK, Thapar R K. A case of Hodgkins Lymphoma presenting as Nephrotic syndrome .J Nepal Paediatr Soc 2016; 36(1):72-74
• Col Sunil Jain Col R.K. Thapar Brig R.K. Gupta. Complete coverage and covering completely: Breast feeding and complementary feeding: Knowledge, attitude, and practices of mothers. Medical Journal of Armed Forces India. 2018; 74: 28-32.   DOI: http://dx.doi.org/10.1016/j.mjafi.2017.03.003
• Col Sunil Jain, Col Rajeev Kumar Thapar, Maj Abhishek Mallick, Sudhanshu Tiwari, Dakhane Yogesh, Y V Abhijith. Evidence-based focused approach for fulfilment of aims: Experiences of an asthma clinic. Indian Journal of Child Health 2017; Vol 4(2):170-175.
• Paidy AR, Thapar RK, Gupta RK. Electrolyte disturbances in critically ill children admitted to paediatric tertiary care centre. J. Evolution Med. Dent. Sci. 2017; 6 (41):3269- 3273.   DOI:10. 14260/Jemds/2017/708
• William W.et al. Trends in Intravenous Antibiotic Duration for Urinary Tract Infections in Young Infants Pediatrics. December 2017; Vol 140(6). Published Comments: Rajeev Kumar Thapar, Neeraj Singh, R K Singh and Ritu Agarwal 20 December 2017, Replied by  William W. Lewis-de los Angeles, Sameer J. Patel 3 January 2018.
• Col Rajeev Kumar Thapar, Anirudh Reddy Paidy, Brig. Rakesh Kumar Gupta. Calcium Disturbances in Critically Ill Children Admitted To Pediatric Intensive Care. International Journal of Medical Science and Innovative Research (IJMSIR): 2017; Vol 2(6): 230 – 236. 
• 25. Tamar R. Lubell, Jonathan M. Barasch, Katherine Xu, Maria Ieni, Keven I. Cabrera, Peter S. Dayan. Urinary Neutrophil Gelatinase–Associated Lipocalin for the Diagnosis of Urinary Tract Infections. Pediatrics.  December 2017; Vol 140 (6)   Published Comments RE: Letter to Editor / Comments on the Article - urinary Neutrophil Gelatinase- Associated Lipocalcin (uNGAL) for the diagnosis of Urinary Tract Infections. RE: R K Thapar, Abhijith Y V and R K Singh, 16 January 2018
• Abhishek Mallick, Rajesh Kumar Singh, Rajeev Kumar Thapar. A Strabismus  Syndrome Causing Chronic Innocuous Headache. .  Pediatric Neurology 2017; 76: 98. http://dx.doi.org/10.1016/j.pediatrneurol.2017.05.020
• Singh RK, Thapar RK, Gupta RK, Abhijith YV. Factors Affecting Drug Compliance in Paediatric Asthma J Nepal Paediatr Soc 2017; 37 (1):31-35.doi: http://dx.doi.org/10.3126/jnps.v37i1.17201
• Bajpai A, Gupta RK, Thapar R K.  Leighs Syndrome due to Unreported Heterozygous Variations in NDUFAF6 Gene. 10.7199/ped.oncall.2018.22
• Maj Abhishek Mallick, Lt Col R.K. Singh, Col R.K. Thapar Hallermann Streiff syndrome: 'Bird faced' but not 'bird brained'. Medical Journal Armed Forces India.2018; 74:193-195 
• Achinta Kumar Mallick, Kannan Venkatnarayan, Rajeev Kumar Thapar, Vishal Vishnu Tiwari, Subhash Chandra Shaw. Morbidity Pattern of Late Preterm Babies Born Small for Gestation. The Indian Journal of Pediatrics. Published online 13 Mar 2019.(https://doi.org/10.1007/s 12098-019-02925-4)
• Ritu Agarwal, R K Thapar, Abhijith Y V. A case of Cri-du-Chat syndrome. Journal of Physiology 2018 V ol XVII :38-39
• Joseph Y. Ting et al. Duration of Initial Empirical Antibiotic Therapy and Outcomes in Very Low Birth Weight Infants. Pediatrics: Mar 2019; Vol 143 (3).  Published Comments: RE: Dr Pratibha, Rajeev Kumar Thapar on 07 Apr 2019. Replied by Joseph Y.Ting & Prakesh S.  Shah on 25 Apr 2019.
• Flory L. et. al. Ambulatory Management of Childhood Asthma Using a Novel Self Management applications. Pediatrics: June 19; Vol 143 (6). Published Comments :RE: Rajeev Kumar Thapar , Amit Naresh , Safal Muhammed,  on 01 July 19 
• Audrey Dionne et.al. Treatment Intensification in Patients with Kawasaki Disease & Coronary Aneurysm at Diagnosis. Pediatrics: June 2019; Vol 143(6).Published Comments : RE: Rajeev Kumar Thapar, Puneet Singh, on 25 July 19
• Thapar RK, Mallick MA, Sandhu  JS. A study of the prevalence of various lower urinary tract symptoms in children with analysis of comorbidities and uroflowmetry. Indian J Child Health. 2019; 6(10):566-568.
• Jain S, Thapar RK. Hygiene and health: Effects, experiences and expertise of “Clean India Campaign” from a tertiary care hospital. Indian J Child Health. 2017; 4(4):518-522.
• Jain S, Chandra N, Thapar RK. Pediatric surgery experiences of a tertiary referral hospital: International Classification of Diseases spectrum for teaching, planning, and scaling up services. Indian J Child Health. 2019; 6(6):313-319.
• Jain S, Thapar RK. Lifes crucial transition and leads for comprehensive trajectory: Adolescents survey at physiological stages for prudent policies and refinements for practice. J Family Med Prim Care 2020; XX:XX-XX.(Accepted for Publication  dated 13-04-2020)
• U.Bansal, S Ghate, P Bhattacharya, R K Thapar, P Gupta. Parental Perspectives on Remote
• Learning  and School Reopening. Indian Pediatr.  2020; 57: 1177-1178
• S Ghate,  B J Parekh, R K Thapar, P R Nadkarni, S Sen, U Bansal, C H Sambhariya, S Popat, P Bhattacharya, S Kirtani,Y Kanetkar, S Popat Vats, SS Kamath, M Raj, G V Basavaraja & P Gupta. Indian Academy of Pediatrics Guidelines on School Reopening, Remote Learning and Curriculum in and After the COVID-19 Pandemic.Indian Pediatr. 2020; 57: 1153-1165
• Swati Ghate,  Siddhesh Zadey,  Rajeev Kumar Thapar,  Dheeraj Shah,  GV Basavaraja, SS Kamath,  Ramesh Kumar R, Nimesh G Desai, Bakul Jayant Parekh,  Vipin M Vashishtha,  Ashok Pandey,  Piyush Gupta. Indian Academy of Pediatrics Revised Guidelines on School Reopening: First Revision. September 2021. Indian Pediatr .2021;58: 959-61

Contribution to Books:

• Atlas & Synopsis of Neonatology. An official Publication Indian academy of Pediatrics, Neonatology Chapter. Jaypee Publishers .First Edition 2016.
• Contributed for Second Edition also & released in PEDICON 2019 at Mumbai)
• Neonatology Protocols. Defence Chapter of NNF. Protocols on Feeding of Low Birth weight babies & Developmentally Supportive care.
• Contributed a Chapter on Heated Humidified High Flow Nasal Canula (H3 FNC) for a book on Non Invasive Ventilation by Intensive Care Chapter of Indian Academy   of Pediatrics(IAP) – (under print) 
• Contributed to IAP Post Graduate Training Module for IAP Respiratory Chapter on a topic : Transient Tachypnea of Newborn (TTNB) – (review process on)