Science Explorer Back to mapMap
Discussion
Hospital / health system · Chennai · India

Apollo Hospitals

In research, Apollo Hospitals stands highest in Medicine (#7,043 of 8,541 worldwide), Surgery (#1,275 of 1,532 worldwide) and Pulmonary and Respiratory Medicine (#912 of 1,037 worldwide), 2022-now. Relative to its size it is most specialised in Surgery and Hematology (Surgery is 8.1× its share of world research).

chennai.apollohospitals.comROR OpenAlex
World rank, 2022-now
#17,582
of 22,385 · #31,859 all time
Rank in India
#1,256
of 1,562
Research works
2.7k
▲ 44% vs 2018-21
Citations
14k
5.2 per fractional work
Top-10% rate
2.6%
all institutions 10.0%
vs its own fields
0.51×
1.00× is exactly expected
Open access
69%
world 40%
International
10%
world 18%
Apollo Hospitals

What is Apollo Hospitals known for in research?

The fields where it stands highest, 2022-now, ranked among every institution above the floor in each field.

FieldWorld rankWhere that sitsTop-10% rateWorksAll time
MedicineField #7,043 of 8,541 2.0%764 #12665
SurgerySubfield #1,275 of 1,532 1.5%184 #2813
Pulmonary and Respiratory MedicineSubfield #912 of 1,037 2.4%78 #1844
Health SciencesDomain #8,727 of 9,902 2.0%797 #15254
Life SciencesDomain #6,277 of 6,403 1.8%105 #10588

Each strip is that field's whole ranked pool, with the notch where Apollo Hospitals sits in it, in the colour of the band that rank falls in. The track under the rate is the rate itself: it carries no average mark, because the average differs by field (from about 6% in Dentistry to 21% in Economics).

Which of those standings moved

The same fields on both windows: where it stood over the whole record, and where it stands in 2022-now. The distance is the story, and it is the one thing the two rank columns above cannot show.

  1. Medicine#12,665 #7,043
  2. Surgery#2,813 #1,275
  3. Pulmonary and Respiratory Medicine#1,844 #912
  4. Health Sciences#15,254 #8,727
  5. Life Sciences#10,588 #6,277
all time2022-now, better2022-now, worse

A dot further right is a better standing. Fields it was not ranked in over the whole record are left out.

Which fields of science does Apollo Hospitals work in?

In 2022-now, 82% of research at Apollo Hospitals is in Health Sciences, 11% in Life Sciences. Its largest fields are Medicine (79%), Biochemistry, Genetics and Molecular Biology (6%), Immunology and Microbiology (3%). It does 3.5× the world's share of Health Sciences.

Health Sciences: 884 fractional works · 82.3% of its workMedicine: 847 fractional works · 78.9% of its workSurgery: 203 fractional works · 18.9% of its workPulmonary and Respiratory Medicine: 86 fractional works · 8.0% of its workEpidemiology: 64 fractional works · 5.9% of its workCardiology and Cardiovascular Medicine: 50 fractional works · 4.7% of its workOncology: 32 fractional works · 3.0% of its workRheumatology: 30 fractional works · 2.8% of its workInfectious Diseases: 29 fractional works · 2.7% of its workPathology and Forensic Medicine: 26 fractional works · 2.4% of its workPhysiology: 26 fractional works · 2.4% of its workPublic Health, Environmental and Occupational Health: 25 fractional works · 2.4% of its workNeurology: 25 fractional works · 2.3% of its workEndocrinology, Diabetes and Metabolism: 24 fractional works · 2.2% of its workHematology: 24 fractional works · 2.2% of its workRadiology, Nuclear Medicine and Imaging: 21 fractional works · 1.9% of its workPediatrics, Perinatology and Child Health: 17 fractional works · 1.5% of its workGenetics: 15 fractional works · 1.4% of its workHepatology: 15 fractional works · 1.4% of its workEmergency Medicine: 13 fractional works · 1.2% of its workNephrology: 12 fractional works · 1.2% of its workObstetrics and Gynecology: 10 fractional works · 1.0% of its workGastroenterology: 10 fractional works · 0.9% of its workCritical Care and Intensive Care Medicine: 8 fractional works · 0.8% of its workOrthopedics and Sports Medicine: 8 fractional works · 0.7% of its workReproductive Medicine: 8 fractional works · 0.7% of its workOtorhinolaryngology: 6 fractional works · 0.6% of its workPsychiatry and Mental health: 6 fractional works · 0.6% of its workDermatology: 6 fractional works · 0.6% of its workAnesthesiology and Pain Medicine: 6 fractional works · 0.6% of its workUrology: 5 fractional works · 0.5% of its workOphthalmology: 5 fractional works · 0.4% of its workPharmacology: 4 fractional works · 0.4% of its workTransplantation: 4 fractional works · 0.3% of its workHealth Informatics: 3 fractional works · 0.3% of its workInternal Medicine: 3 fractional works · 0.3% of its workRehabilitation: 3 fractional works · 0.3% of its workComplementary and alternative medicine: 3 fractional works · 0.3% of its workGeriatrics and Gerontology: 2 fractional works · 0.2% of its workSmaller subfields together: 7 fractional works · 0.6% of its workHealth Professions: 21 fractional works · 2.0% of its workGeneral Health Professions: 6 fractional works · 0.6% of its workEmergency Medical Services: 4 fractional works · 0.4% of its workPharmacy: 3 fractional works · 0.3% of its workSpeech and Hearing: 3 fractional works · 0.3% of its workHealth Information Management: 3 fractional works · 0.3% of its workSmaller subfields together: 2 fractional works · 0.2% of its workDentistry: 7 fractional works · 0.6% of its workOral Surgery: 4 fractional works · 0.4% of its workSmaller subfields together: 2 fractional works · 0.2% of its workNursing: 7 fractional works · 0.6% of its workNutrition and Dietetics: 6 fractional works · 0.5% of its workSmaller subfields together: 1 fractional works · 0.1% of its workVeterinary: 2 fractional works · 0.2% of its workLife Sciences: 118 fractional works · 11.0% of its workBiochemistry, Genetics and Molecular Biology: 65 fractional works · 6.1% of its workMolecular Biology: 22 fractional works · 2.0% of its workGenetics: 20 fractional works · 1.8% of its workCancer Research: 10 fractional works · 0.9% of its workClinical Biochemistry: 6 fractional works · 0.5% of its workMolecular Medicine: 3 fractional works · 0.3% of its workEndocrinology: 2 fractional works · 0.2% of its workSmaller subfields together: 2 fractional works · 0.2% of its workImmunology and Microbiology: 29 fractional works · 2.7% of its workImmunology: 17 fractional works · 1.6% of its workApplied Microbiology and Biotechnology: 7 fractional works · 0.6% of its workParasitology: 3 fractional works · 0.3% of its workSmaller subfields together: 3 fractional works · 0.3% of its workNeuroscience: 13 fractional works · 1.2% of its workCellular and Molecular Neuroscience: 4 fractional works · 0.4% of its workNeurology: 3 fractional works · 0.3% of its workCognitive Neuroscience: 3 fractional works · 0.3% of its workSmaller subfields together: 2 fractional works · 0.2% of its workAgricultural and Biological Sciences: 5 fractional works · 0.5% of its workPharmacology, Toxicology and Pharmaceutics: 5 fractional works · 0.5% of its workPharmacology: 4 fractional works · 0.4% of its workSmaller subfields together: 1 fractional works · 0.1% of its workPhysical Sciences: 41 fractional works · 3.9% of its workEngineering: 20 fractional works · 1.9% of its workBiomedical Engineering: 13 fractional works · 1.2% of its workSmaller subfields together: 8 fractional works · 0.7% of its workComputer Science: 5 fractional works · 0.5% of its workArtificial Intelligence: 3 fractional works · 0.3% of its workSmaller subfields together: 2 fractional works · 0.2% of its workEnvironmental Science: 5 fractional works · 0.4% of its workMaterials Science: 4 fractional works · 0.4% of its workPolymers and Plastics: 3 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.1% of its workChemistry: 3 fractional works · 0.3% of its workPhysics and Astronomy: 2 fractional works · 0.2% of its workMathematics: 1 fractional works · 0.1% of its workEnergy: 0 fractional works · 0.0% of its workEarth and Planetary Sciences: 0 fractional works · 0.0% of its workChemical Engineering: 0 fractional works · 0.0% of its workSocial Sciences: 30 fractional works · 2.8% of its workSocial Sciences: 12 fractional works · 1.1% of its workEducation: 4 fractional works · 0.4% of its workSociology and Political Science: 4 fractional works · 0.3% of its workSmaller subfields together: 4 fractional works · 0.4% of its workPsychology: 7 fractional works · 0.7% of its workClinical Psychology: 4 fractional works · 0.4% of its workSmaller subfields together: 3 fractional works · 0.3% of its workEconomics, Econometrics and Finance: 4 fractional works · 0.4% of its workEconomics and Econometrics: 4 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.1% of its workBusiness, Management and Accounting: 3 fractional works · 0.3% of its workArts and Humanities: 3 fractional works · 0.2% of its workDecision Sciences: 1 fractional works · 0.1% of its workALL ITS WORKApollo Hospitals1,074fractional works, 2022-now
Life Sciences11%Physical Sciences4%Health Sciences82%Social Sciences3%

Each ring splits the one inside it: the four domains of science, their fields, their subfields. Size is fractional works in 2022-now. Every slice is a page; the interactive view zooms down to single topics and colours each by how much more of it this institution does than the world.

Its 4 domains and 26 fields, with their numbers
    1. Medicine84778.9%
    2. Health Professions212.0%
    3. Dentistry70.6%
    4. Nursing70.6%
    5. Veterinary20.2%
    1. Biochemistry, Genetics and Molecular Biology656.1%
    2. Immunology and Microbiology292.7%
    3. Neuroscience131.2%
    4. Agricultural and Biological Sciences50.5%
    5. Pharmacology, Toxicology and Pharmaceutics50.5%
    1. Engineering201.9%
    2. Computer Science50.5%
    3. Environmental Science50.4%
    4. Materials Science40.4%
    5. Chemistry30.3%
    6. Physics and Astronomy20.2%
    7. Mathematics10.1%
    8. Energy00.0%
    9. Earth and Planetary Sciences00.0%
    10. Chemical Engineering00.0%
    1. Social Sciences121.1%
    2. Psychology70.7%
    3. Economics, Econometrics and Finance40.4%
    4. Business, Management and Accounting30.3%
    5. Arts and Humanities30.2%
    6. Decision Sciences10.1%
All of science, and how each field's share has moved since 1950: the Science domain explorer

What does Apollo Hospitals specialise in?

Where its research is concentrated relative to its size: Surgery takes 8.1× the share of its output that it takes of world research.

  1. SurgerySubfield · 203.3 works8.1×
  2. HematologySubfield · 23.8 works7.3×
← less than its size predicts1×more →

Location quotient, a volume reading rather than an impact one. It surfaces small, lopsided specialities.

Field profile

Location quotient across every field it publishes in: outside the ring is more than an institution of this size would be expected to publish, inside it is less.

Agricultural and Biological Sciences: 0.11× its world share, 5 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 1.14× its world share, 65 worksBiochemistry, Geneti…Immunology and Microbiology: 2.72× its world share, 29 worksImmunology and Micro…Neuroscience: 0.74× its world share, 13 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 1.43× its world share, 5 worksPharmacology, Toxico…Chemical Engineering: 0.09× its world share, 0 worksChemical EngineeringChemistry: 0.16× its world share, 3 worksChemistryComputer Science: 0.06× its world share, 5 worksComputer ScienceEarth and Planetary Sciences: 0.02× its world share, 0 worksEarth and Planetary …Energy: 0.05× its world share, 0 worksEnergyEngineering: 0.12× its world share, 20 worksEngineeringEnvironmental Science: 0.09× its world share, 5 worksEnvironmental ScienceMaterials Science: 0.12× its world share, 4 worksMaterials ScienceMathematics: 0.07× its world share, 1 worksMathematicsPhysics and Astronomy: 0.10× its world share, 2 worksPhysics and AstronomyDentistry: 1.31× its world share, 7 worksDentistryHealth Professions: 0.75× its world share, 21 worksHealth ProfessionsMedicine: 4.10× its world share, 847 worksMedicineNursing: 1.28× its world share, 7 worksNursingVeterinary: 1.43× its world share, 2 worksVeterinaryArts and Humanities: 0.08× its world share, 2 worksArts and HumanitiesBusiness, Management and Accounting: 0.10× its world share, 3 worksBusiness, Management…Decision Sciences: 0.13× its world share, 1 worksDecision SciencesEconomics, Econometrics and Finance: 0.18× its world share, 4 worksEconomics, Econometr…Psychology: 0.22× its world share, 7 worksPsychologySocial Sciences: 0.08× its world share, 12 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Medicine, 4.1×. Every wedge is a field page.

All 26 fields, with their numbers
  1. Medicine4.10×847 works
  2. Immunology and Microbiology2.72×29 works
  3. Pharmacology, Toxicology and Pharmaceutics1.43×5 works
  4. Veterinary1.43×2 works
  5. Dentistry1.31×7 works
  6. Nursing1.28×7 works
  7. Biochemistry, Genetics and Molecular Biology1.14×65 works
  8. Health Professions0.75×21 works
  9. Neuroscience0.74×13 works
  10. Psychology0.22×7 works
  11. Economics, Econometrics and Finance0.18×4 works
  12. Chemistry0.16×3 works
  13. Decision Sciences0.13×1 works
  14. Engineering0.12×20 works
  15. Materials Science0.12×4 works
  16. Agricultural and Biological Sciences0.11×5 works
  17. Physics and Astronomy0.10×2 works
  18. Business, Management and Accounting0.10×3 works
  19. Chemical Engineering0.09×0 works
  20. Environmental Science0.09×5 works
  21. Arts and Humanities0.08×2 works
  22. Social Sciences0.08×12 works
  23. Mathematics0.07×1 works
  24. Computer Science0.06×5 works
  25. Energy0.05×0 works
  26. Earth and Planetary Sciences0.02×0 works

Who are the top researchers at Apollo Hospitals?

Ranked on the quality score, Suchitra Ranjit, Bharath Kumar Tirupakuzhi Vijayaraghavan and Vijayashankar Paramanandam lead among researchers whose main affiliation is Apollo Hospitals.

  1. 1 Suchitra Ranjit India · #195,755 worldwide 5.5k citations · 108 works
  2. 2 Bharath Kumar Tirupakuzhi Vijayaraghavan India · #237,445 worldwide 2.1k citations · 106 works
  3. 3 Vijayashankar Paramanandam India · #997,945 worldwide 710 citations · 28 works
  4. 4 Devachandran Jayakumar India · #1,324,132 worldwide 1.6k citations · 32 works
  5. 5 Pratheema Ramachandran India · #1,429,196 worldwide 627 citations · 25 works
  6. 6 Nagarajan Ramakrishnan India · #1,562,024 worldwide 2.2k citations · 133 works
  7. 7 Nandini Sethuraman India · #2,308,314 worldwide 2.7k citations · 60 works
  8. 8 Abraham Oomman India · #2,740,557 worldwide 2k citations · 113 works
  9. 9 Sankar Srinivasan India · #2,834,187 worldwide 2.1k citations · 16 works
  10. 10 Murlidhar Rajagopalan India · #2,864,783 worldwide 2k citations · 62 works
All ranked researchers at Apollo Hospitals

What are the most cited papers from Apollo Hospitals?

The most cited paper from Apollo Hospitals is "Emergence of a new antibiotic resistance mechanism in India, Pakistan, and the UK: a molecular, biological, and epidemiological study" (Kanimozhi Kumarasamy et al., 2010), with 2,938 citations. Next come "Interpreting Diagnostic Tests for SARS-CoV-2" (1,629) and "A Prospective, Molecular Epidemiology Study of EGFR Mutations in Asian Patients with Advanced Non–Small-Cell Lung Cancer of Adenocarcinoma Histology (PIONEER)" (1,593).

Most cited papers
#PaperReleasedCitations
1 Emergence of a new antibiotic resistance mechanism in India, Pakistan, and the UK: a molecular, biological, and epidemiological study Kanimozhi Kumarasamy et al. · The Lancet Infectious Diseases Open access 11 Aug 2010 2,938
2 Interpreting Diagnostic Tests for SARS-CoV-2 Nandini Sethuraman, Sundararaj Stanleyraj Jeremiah, Akihide Ryo · JAMA 6 May 2020 1,629
3 A Prospective, Molecular Epidemiology Study of EGFR Mutations in Asian Patients with Advanced Non–Small-Cell Lung Cancer of Adenocarcinoma Histology (PIONEER) Yuankai Shi, Joseph S. K. Au, Sumitra Thongprasert et al. · Journal of Thoracic Oncology Open access 13 Jan 2014 1,593
4 Surviving Sepsis Campaign International Guidelines for the Management of Septic Shock and Sepsis-Associated Organ Dysfunction in Children Scott L. Weiss et al. · Pediatric Critical Care Medicine Open access Feb 2020 1,246
5 Micafungin versus liposomal amphotericin B for candidaemia and invasive candidosis: a phase III randomised double-blind trial Ernst-Rüdiger Kuse et al. · The Lancet Open access 27 Apr 2007 694
All 59 most cited papers, with filters and sorting

Which keywords describe research at Apollo Hospitals?

By fractional works in 2022-now, weighted toward what it does more of than the world: Epidemiology, Diagnosis, Treatment, Surgical Management, Complications, Management, Chemotherapy and Prognostic Factors.

▲ more of its work than of the world's◆ about the world's share▼ less than the world's

Size is fractional works in 2022-now in the topics tagged with each word; colour is the word's share of this institution's work against its share of the world's. The 40 words are chosen for being large and distinctive. Each links to the topic it comes from most.

All 40 words, with their numbers
  1. Epidemiology153▲ 3.6×120 topics
  2. Diagnosis71▲ 7.1×40 topics
  3. Treatment63▲ 4.8×46 topics
  4. Inflammation50▲ 2.2×64 topics
  5. Management47▲ 5.5×28 topics
  6. Surgical Management44▲ 10×20 topics
  7. Complications42▲ 7.9×16 topics
  8. Chemotherapy39▲ 5.2×24 topics
  9. Clinical Practice Guidelines34▲ 5.8×14 topics
  10. Prognostic Factors32▲ 6.8×14 topics
  11. Guidelines32▲ 6.2×12 topics
  12. Risk Factors31▲ 2.6×30 topics
  13. Quality of Life29▲ 1.88×37 topics
  14. Cardiovascular Disease29▲ 2.4×33 topics
  15. Genetic Mutations26▲ 5.6×23 topics
  16. Radiotherapy26▲ 6.1×13 topics
  17. Immunotherapy24▲ 3.1×16 topics
  18. Surgery23▲ 6.2×11 topics
  19. Mortality22▲ 3.6×12 topics
  20. Biomarkers21▲ 2.8×16 topics
  21. Prognosis21▲ 5.9×9 topics
  22. Pathogenesis21▲ 3.8×22 topics
  23. Immune Response20▲ 3.4×20 topics
  24. Heart Failure18▲ 3.9×12 topics
  25. Pathophysiology18▲ 5.8×11 topics
  26. Antibiotic Resistance18▲ 4.3×12 topics
  27. Critical Care17▲ 6.7×8 topics
  28. Children16▲ 6.6×7 topics
  29. Surgical Treatment16▲ 7.7×6 topics
  30. Postoperative Complications16▲ 11×4 topics
  31. Drug Resistance16▲ 5.0×6 topics
  32. Survival Analysis16▲ 5.3×7 topics
  33. Thrombosis16▲ 5.2×7 topics
  34. Echocardiography15▲ 5.2×8 topics
  35. Imaging15▲ 5.8×5 topics
  36. Neoadjuvant Therapy14▲ 5.5×5 topics
  37. Sepsis13▲ 6.8×6 topics
  38. Percutaneous Coronary Intervention13▲ 8.9×4 topics
  39. Molecular Characterization13▲ 6.8×6 topics
  40. Liver Transplantation12▲ 9.6×5 topics

Which research topics does Apollo Hospitals publish most on?

By volume in 2022-now: Liver Disease and Transplantation, Gastrointestinal disorders and treatments, Liver Disease Diagnosis and Treatment and Cardiac Valve Diseases and Treatments.

Liver Disease and Transp…9Liver Disease and Transplantation: 9 fractional worksGastrointestinal disorde…8Gastrointestinal disorders and treatments: 8 fractional worksLiver Disease Diagnosis and Treatment: 8 fractional worksCardiac Valve Diseases and Treatments: 8 fractional worksTracheal and airway disorders: 8 fractional worksCardiac, Anesthesia and Surgical Outcomes: 8 fractional worksCoronary Interventions and Diagnostics: 8 fractional worksSpine and Intervertebral…7Spine and Intervertebral Disc Pathology: 7 fractional worksAnesthesia and Pain Management: 7 fractional worksCongenital Heart Disease Studies: 7 fractional works
HepatologySurgeryEpidemiologyCardiology and Cardiovascular Medicine2 others

Area is fractional works; colour is the subfield each topic belongs to.

  1. 1 Liver Disease and Transplantation Hepatology 9 works
  2. 2 Gastrointestinal disorders and treatments Surgery 8 works
  3. 3 Liver Disease Diagnosis and Treatment Epidemiology 8 works
  4. 4 Cardiac Valve Diseases and Treatments Cardiology and Cardiovascular Medicine 8 works
  5. 5 Tracheal and airway disorders Pulmonary and Respiratory Medicine 8 works
  6. 6 Cardiac, Anesthesia and Surgical Outcomes Cardiology and Cardiovascular Medicine 8 works
  7. 7 Coronary Interventions and Diagnostics Surgery 8 works
  8. 8 Spine and Intervertebral Disc Pathology Pathology and Forensic Medicine 7 works
  9. 9 Anesthesia and Pain Management Surgery 7 works
  10. 10 Congenital Heart Disease Studies Epidemiology 7 works

How open and international is its research?

Against the world's own shares: the tick on each track. Both are shares of its output, so they sit on one scale and can be read against each other as well as against the world.

openly available69.0%not open31.0%

World: 40% of research is openly available.

with international co-authors9.9%domestic only90.1%

World: 18% is written across borders.

How has Apollo Hospitals's research output changed?

Output in 2022-2025 was 44% higher than in 2018-2021.

still counting1990200020102020
grewheldshrank

The same series as a ribbon: one cell per year, darker for more. The line above answers how much; this answers when.

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is Apollo Hospitals as a percentage of every work published that year, 0.0042% in 2024.

still counting0.0020%0.0040%0.0060%Apollo Hospitals0.0048% in 202519801990200020102020

Fractional works of Apollo Hospitals over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year, against all institutions in the same year.

still counting5%10%15%all institutions10.0% in 2025Apollo Hospitals1.9% in 202520102020

Of each year's output, the share that reached the world's 10% most cited for its field and year. Peak 7.1% in 2010.

Other research institutions in Chennai

All research institutions in Chennai

Share Apollo Hospitals's ranking

Apollo Hospitals on Science Explorer

A card with Apollo Hospitals's standing and the fields it leads in, for a post or a slide. A link to this page previews as the same card.

Download the card

1200 × 630 PNG, sized for social posts, drawn from the latest snapshot.

Badges for a website1Each links back here and updates with every snapshot

Research measures only: rankings here say nothing about teaching, admissions or student experience. Comparable institutions and collaboration partners have tabs of their own, above.

Discussion

Ask a question or share a note about Apollo Hospitals. Posts are plain text and can be reported.