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Hospital / health system · Chennai · India

Apollo Hospitals

In research, Apollo Hospitals stands highest in Medicine (#3,404 of 10,443 worldwide), Health Sciences (#4,172 of 11,982 worldwide) and Surgery (#1,331 of 1,816 worldwide), 2022–2025. Relative to its size it is most specialised in Surgery and Rheumatology — Surgery is 8.2× its share of world research.

chennai.apollohospitals.comROR OpenAlex
World rank, 2022–2025
#12,517
of 28,054 · #15,368 all time
Rank in India
#871
of 1,840
Research works
2.7k
▲ 80% vs 2013–17
Citations
14k
5.2 per fractional work
Top-10% rate
3.7%
record average 16.5%
Open access
69%
world 28%

What is Apollo Hospitals known for in research?

The fields where it stands highest, 2022–2025, ranked among every institution above the floor in each field.

FieldWorld rankWhere that sitsTop-10% rateWorksAll time
MedicineField #3,404 of 10,443 3.9%764 #4047
Health SciencesDomain #4,172 of 11,982 4.0%797 #5267
SurgerySubfield #1,331 of 1,816 3.7%184 #2875
Life SciencesDomain #6,658 of 7,800 2.7%105 #9361
Pulmonary and Respiratory MedicineSubfield #1,081 of 1,144 3.6%78 #2377

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 world mark, because the world rate differs by field (from about 6% to 21% in this record).

Which of those standings moved

The same fields on both windows: where it stood over the whole record, and where it stands in 2022–2025. The distance is the story, and it is the one thing the two rank columns above cannot show.

  1. Medicine#4,047 #3,404
  2. Health Sciences#5,267 #4,172
  3. Surgery#2,875 #1,331
  4. Life Sciences#9,361 #6,658
  5. Pulmonary and Respiratory Medicine#2,377 #1,081
all time2022–2025, better2022–2025, worse

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

What does Apollo Hospitals specialise in?

Where its research is concentrated relative to its size: Surgery takes 8.2× the share of its output that it takes of world research.

  1. SurgerySubfield · 184.4 works8.2×
  2. RheumatologySubfield · 26.6 works6.0×
← 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: 1.11× its world share, 57 worksBiochemistry, Geneti…Immunology and Microbiology: 2.74× its world share, 27 worksImmunology and Micro…Neuroscience: 0.74× its world share, 12 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 1.46× its world share, 5 worksPharmacology, Toxico…Chemical Engineering: 0.10× its world share, 0 worksChemical EngineeringChemistry: 0.18× its world share, 3 worksChemistryComputer Science: 0.05× its world share, 4 worksComputer ScienceEarth and Planetary Sciences: 0.02× its world share, 0 worksEarth and Planetary …Energy: 0.06× its world share, 0 worksEnergyEngineering: 0.12× its world share, 17 worksEngineeringEnvironmental Science: 0.09× its world share, 4 worksEnvironmental ScienceMaterials Science: 0.11× its world share, 4 worksMaterials ScienceMathematics: 0.06× its world share, 1 worksMathematicsPhysics and Astronomy: 0.08× its world share, 2 worksPhysics and AstronomyDentistry: 1.35× its world share, 6 worksDentistryHealth Professions: 0.73× its world share, 18 worksHealth ProfessionsMedicine: 4.12× its world share, 764 worksMedicineNursing: 1.27× its world share, 6 worksNursingVeterinary: 1.15× its world share, 2 worksVeterinaryArts and Humanities: 0.08× its world share, 2 worksArts and HumanitiesBusiness, Management and Accounting: 0.09× its world share, 3 worksBusiness, Management…Decision Sciences: 0.11× its world share, 1 worksDecision SciencesEconomics, Econometrics and Finance: 0.19× its world share, 4 worksEconomics, Econometr…Psychology: 0.20× its world share, 6 worksPsychologySocial Sciences: 0.08× its world share, 10 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.

Who are the top researchers at Apollo Hospitals?

Ranked on the composite score, Supratik Bhattacharyya, Abdul Ghafur and Krishnan Ganapathy lead among researchers whose main affiliation is Apollo Hospitals.

  1. 1 Supratik Bhattacharyya India · #312,498 worldwide 97 citations · 17 works
  2. 2 Abdul Ghafur India · #315,375 worldwide 34 citations · 30 works
  3. 3 Krishnan Ganapathy India · #478,392 worldwide 32 citations · 28 works
  4. 4 Sriram Kalyanaraman India · #527,844 worldwide 52 citations · 22 works
  5. 5 Revathi Raj India · #746,792 worldwide 52 citations · 35 works
  6. 6 Abraham Oomman India · #849,344 worldwide 27 citations · 22 works
  7. 7 Nagarajan Ramakrishnan India · #1,364,101 worldwide 27 citations · 16 works
  8. 8 Ananthakrishnan Sivaraman India · #1,375,545 worldwide 7 citations · 19 works
  9. 9 Ramya Uppuluri India · #1,390,816 worldwide 11 citations · 33 works
  10. 10 R Narasimhan India · #1,410,536 worldwide 6 citations · 18 works
All ranked researchers at Apollo Hospitals

Which keywords describe research at Apollo Hospitals?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Epidemiology, Diagnosis, Treatment, Surgical Management, Complications, Management, Clinical Practice Guidelines and Chemotherapy.

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

Size is fractional works in 2022–2025 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. Epidemiology140▲ 3.7×115 topics
  2. Diagnosis65▲ 7.2×40 topics
  3. Treatment57▲ 4.9×45 topics
  4. Inflammation43▲ 2.1×62 topics
  5. Management43▲ 5.6×28 topics
  6. Surgical Management40▲ 10×19 topics
  7. Complications39▲ 8.1×16 topics
  8. Chemotherapy34▲ 5.0×23 topics
  9. Clinical Practice Guidelines31▲ 5.9×14 topics
  10. Prognostic Factors29▲ 6.8×14 topics
  11. Guidelines28▲ 6.3×12 topics
  12. Risk Factors27▲ 2.5×30 topics
  13. Cardiovascular Disease26▲ 2.4×32 topics
  14. Quality of Life25▲ 1.79×36 topics
  15. Genetic Mutations24▲ 5.7×22 topics
  16. Radiotherapy22▲ 6.0×13 topics
  17. Surgery22▲ 6.3×11 topics
  18. Immunotherapy21▲ 3.1×16 topics
  19. Immune Response20▲ 3.6×20 topics
  20. Mortality19▲ 3.5×12 topics
  21. Prognosis19▲ 5.9×9 topics
  22. Pathogenesis19▲ 3.8×21 topics
  23. Biomarkers18▲ 2.8×15 topics
  24. Pathophysiology17▲ 6.0×10 topics
  25. Heart Failure17▲ 4.0×12 topics
  26. Antibiotic Resistance16▲ 4.3×12 topics
  27. Children16▲ 6.9×7 topics
  28. Surgical Treatment15▲ 7.9×6 topics
  29. Critical Care15▲ 6.7×8 topics
  30. Echocardiography15▲ 5.7×8 topics
  31. Survival Analysis15▲ 5.5×7 topics
  32. Postoperative Complications14▲ 11×4 topics
  33. Thrombosis14▲ 5.3×7 topics
  34. Drug Resistance14▲ 5.1×6 topics
  35. Myocardial Infarction13▲ 5.9×6 topics
  36. Imaging13▲ 5.4×5 topics
  37. Liver Transplantation12▲ 10×5 topics
  38. Percutaneous Coronary Intervention12▲ 9.3×4 topics
  39. Molecular Characterization12▲ 6.8×6 topics
  40. Spinal Fusion11▲ 12×2 topics

Which research topics does Apollo Hospitals publish most on?

By volume in 2022–2025: Liver Disease and Transplantation, Cardiac Valve Diseases and Treatments, Gastrointestinal disorders and treatments and Coronary Interventions and Diagnostics.

Liver Disease and Transp…9Liver Disease and Transplantation: 9 fractional worksCardiac Valve Diseases a…8Cardiac Valve Diseases and Treatments: 8 fractional worksGastrointestinal disorders and treatments: 8 fractional worksCoronary Interventions and Diagnostics: 7 fractional worksLiver Disease Diagnosis and Treatment: 7 fractional worksSpine and Intervertebral Disc Pathology: 7 fractional worksAnesthesia and Pain Management: 7 fractional worksTracheal and airway diso…7Tracheal and airway disorders: 7 fractional worksCardiac, Anesthesia and Surgical Outcomes: 7 fractional worksCongenital Heart Disease Studies: 7 fractional works
HepatologyCardiology and Cardiovascular MedicineSurgeryEpidemiology2 others

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

  1. 1 Liver Disease and Transplantation Hepatology 9 works
  2. 2 Cardiac Valve Diseases and Treatments Cardiology and Cardiovascular Medicine 8 works
  3. 3 Gastrointestinal disorders and treatments Surgery 8 works
  4. 4 Coronary Interventions and Diagnostics Surgery 7 works
  5. 5 Liver Disease Diagnosis and Treatment Epidemiology 7 works
  6. 6 Spine and Intervertebral Disc Pathology Pathology and Forensic Medicine 7 works
  7. 7 Anesthesia and Pain Management Surgery 7 works
  8. 8 Tracheal and airway disorders Pulmonary and Respiratory Medicine 7 works
  9. 9 Cardiac, Anesthesia and Surgical Outcomes Cardiology and Cardiovascular Medicine 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: 28% of research is openly available.

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

World: 19% is written across borders.

How has Apollo Hospitals's research output changed?

Output in 2018–2022 was 80% higher than in 2013–2017.

1990200020102020
grewheldshrank

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

Other research institutions in Chennai

All research institutions in Chennai

Research measures only: rankings here say nothing about teaching, admissions or student experience. Comparable institutions and collaboration partners are in the interactive view on the map.