World's Best Scientists 2026 revealed!

D-Index & Metrics

Medicine

D-Index
133
Citations
62124
World Ranking
2243
National Ranking
1265

Clifford Y. Ko publication distribution in Medicine in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Medicine in 2026. The highlighted bar marks where Clifford Y. Ko sits on this spectrum.

101–120 publications: 5 scientists 121–140 publications: 26 scientists 141–160 publications: 73 scientists 161–180 publications: 155 scientists 181–200 publications: 230 scientists 201–220 publications: 363 scientists 221–240 publications: 487 scientists 241–260 publications: 545 scientists 261–280 publications: 722 scientists 281–300 publications: 768 scientists 301–320 publications: 834 scientists 321–340 publications: 895 scientists 341–360 publications: 922 scientists 361–380 publications: 838 scientists 381–400 publications: 861 scientists 401–420 publications: 918 scientists 421–440 publications: 806 scientists 441–460 publications: 771 scientists 461–480 publications: 751 scientists 481–500 publications: 713 scientists 501–520 publications: 617 scientists 521–540 publications: 610 scientists 541–560 publications: 537 scientists 561–580 publications: 504 scientists 581–600 publications: 509 scientists 601–620 publications: 396 scientists 621–640 publications: 386 scientists 641–660 publications: 371 scientists 661–680 publications: 340 scientists 681–700 publications: 336 scientists 701–720 publications: 307 scientists 721–740 publications: 259 scientists 741–760 publications: 230 scientists 761–780 publications: 228 scientists 781–800 publications: 217 scientists 801–820 publications: 204 scientists 821–840 publications: 186 scientists 841–860 publications: 177 scientists 861–880 publications: 155 scientists 881–900 publications: 139 scientists 901–920 publications: 145 scientists 921–940 publications: 116 scientists 941–960 publications: 133 scientists 961–980 publications: 91 scientists 981–1,000 publications: 96 scientists 1,001–1,020 publications: 77 scientists 1,021–1,040 publications: 70 scientists 1,041–1,060 publications: 63 scientists 1,061–1,080 publications: 77 scientists 1,081–1,100 publications: 49 scientists 1,101–1,120 publications: 54 scientists 1,121–1,140 publications: 49 scientists 1,141–1,160 publications: 51 scientists 1,161–1,180 publications: 35 scientists 1,181–1,200 publications: 39 scientists 1,201–1,220 publications: 26 scientists 1,221–1,240 publications: 37 scientists 1,241–1,260 publications: 36 scientists 1,261–1,280 publications: 27 scientists 1,281–1,300 publications: 32 scientists 1,301–1,320 publications: 28 scientists 1,321–1,340 publications: 17 scientists 1,341–1,360 publications: 30 scientists 1,361–1,380 publications: 28 scientists 1,381–1,400 publications: 17 scientists 1,401–1,420 publications: 21 scientists 1,421–1,440 publications: 15 scientists 1,441–1,460 publications: 12 scientists 1,461–1,480 publications: 12 scientists 1,481–1,500 publications: 18 scientists 1,501–1,520 publications: 14 scientists 1,521–1,540 publications: 17 scientists 1,541–1,560 publications: 15 scientists 1,561–1,580 publications: 6 scientists 1,581–1,600 publications: 2 scientists 1,601–1,620 publications: 12 scientists 1,621–1,640 publications: 11 scientists 1,641–1,660 publications: 8 scientists 1,661–1,680 publications: 5 scientists 1,681–1,700 publications: 5 scientists 1,701–1,720 publications: 10 scientists 1,721–1,740 publications: 12 scientists 1,741–1,760 publications: 14 scientists 1,761–1,780 publications: 6 scientists 1,781–1,795 publications: 5 scientists 1,796+ publications: 100 scientists
101 publications 1,796+

This scientist: 674 publications — 79th percentile

79% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,796 publications or more.

Clifford Y. Ko D-index placement in Medicine in 2026

The chart shows the D-index (discipline H-index) distribution of Medicine scientists ranked by Research.com in 2026. The highlighted bar marks where Clifford Y. Ko sits on this spectrum.

70–71 D-Index: 226 scientists 72–73 D-Index: 391 scientists 74–75 D-Index: 574 scientists 76–77 D-Index: 730 scientists 78–79 D-Index: 891 scientists 80–81 D-Index: 972 scientists 82–83 D-Index: 1,027 scientists 84–85 D-Index: 1,003 scientists 86–87 D-Index: 960 scientists 88–89 D-Index: 970 scientists 90–91 D-Index: 922 scientists 92–93 D-Index: 839 scientists 94–95 D-Index: 808 scientists 96–97 D-Index: 779 scientists 98–99 D-Index: 668 scientists 100–101 D-Index: 611 scientists 102–103 D-Index: 630 scientists 104–105 D-Index: 513 scientists 106–107 D-Index: 541 scientists 108–109 D-Index: 445 scientists 110–111 D-Index: 429 scientists 112–113 D-Index: 399 scientists 114–115 D-Index: 393 scientists 116–117 D-Index: 318 scientists 118–119 D-Index: 302 scientists 120–121 D-Index: 287 scientists 122–123 D-Index: 255 scientists 124–125 D-Index: 256 scientists 126–127 D-Index: 252 scientists 128–129 D-Index: 230 scientists 130–131 D-Index: 179 scientists 132–133 D-Index: 168 scientists 134–135 D-Index: 163 scientists 136–137 D-Index: 159 scientists 138–139 D-Index: 134 scientists 140–141 D-Index: 134 scientists 142–143 D-Index: 118 scientists 144–145 D-Index: 109 scientists 146–147 D-Index: 106 scientists 148–149 D-Index: 74 scientists 150–151 D-Index: 79 scientists 152–153 D-Index: 80 scientists 154–155 D-Index: 87 scientists 156–157 D-Index: 57 scientists 158–159 D-Index: 74 scientists 160–161 D-Index: 69 scientists 162–163 D-Index: 60 scientists 164–165 D-Index: 53 scientists 166–167 D-Index: 39 scientists 168–169 D-Index: 42 scientists 170–171 D-Index: 32 scientists 172–173 D-Index: 39 scientists 174–175 D-Index: 40 scientists 176–177 D-Index: 28 scientists 178–179 D-Index: 19 scientists 180–181 D-Index: 23 scientists 182–183 D-Index: 31 scientists 184–185 D-Index: 18 scientists 186–187 D-Index: 20 scientists 188–189 D-Index: 22 scientists 190–191 D-Index: 13 scientists 192–193 D-Index: 21 scientists 194–195 D-Index: 12 scientists 196–197 D-Index: 12 scientists 198–199 D-Index: 14 scientists 200–201 D-Index: 15 scientists 202–203 D-Index: 13 scientists 204–205 D-Index: 10 scientists 206–207 D-Index: 8 scientists 208–209 D-Index: 4 scientists 210–211 D-Index: 12 scientists 212–213 D-Index: 11 scientists 214–215 D-Index: 10 scientists 216 D-Index: 4 scientists 217+ D-Index: 98 scientists
70 D-Index 217+

This scientist: 133 D-Index — 89th percentile

89% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 217 D-Index or more.

Overview

Clifford Y. Ko is affiliated with the University of California, Los Angeles, in the United States. Their work spans several fields related to medicine, including health professions, orthopedics and sports medicine, surgery, and endocrinology, diabetes, and metabolism.

The main fields of study for Clifford Y. Ko encompass Medicine and Health Professions. Within these broader domains, their research covers a variety of subfields such as General Health Professions, Orthopedics and Sports Medicine, Surgery, and Endocrinology, Diabetes and Metabolism.

Topics frequently addressed by Ko include Hermeneutics and Narrative Identity, Aging, Elder Care, and Social Issues, Health, Medicine and Society, Foot and Ankle Surgery, Tendon Structure and Treatment, Orthopedic Surgery and Rehabilitation, and Diabetic Foot Ulcer Assessment and Management.

Ko has authored several recent papers, demonstrating a focus on clinical and surgical aspects of health care, particularly among older adults and in foot and ankle surgery. The recent publications are:

  • Perioperative Pain Management Issues Unique to Older Adults Undergoing Surgery: A Narrative Review, 2021, PubMed
  • The Effect of Frontal Deformity at the Ankle Joint on Total Ankle Arthroplasty Revision Rate, 2023, The Journal of Foot & Ankle Surgery
  • An Algorithm for Evaluation and Management of Diabetic Foot Ulcers, 2021, Diabetes & its Complications
  • Table of Contents, 2023, Gastroenterology

Frequent coauthors collaborating with Clifford Y. Ko include William D. Chey, Adam D. Shellito, Jill Q. Dworsky, Patrick Kirkland, and Ronnie A. Rosenthal.

Publication venues associated with Ko's work cover several journals with relevant medical and surgical scopes. These venues are PubMed, The Journal of Foot & Ankle Surgery, Diabetes & its Complications, and Gastroenterology.

Best Publications

  • Colon Cancer Survival Rates With the New American Joint Committee on Cancer Sixth Edition Staging

    Jessica B. O'Connell;Melinda A. Maggard;Clifford Y. Ko

  • Development and Evaluation of the Universal ACS NSQIP Surgical Risk Calculator: A Decision Aid and Informed Consent Tool for Patients and Surgeons

    Karl Y. Bilimoria;Yaoming Liu;Jennifer L. Paruch;Lynn Zhou

  • The National Cancer Data Base: A Powerful Initiative to Improve Cancer Care in the United States

    Karl Y. Bilimoria;Andrew K. Stewart;David P. Winchester;Clifford Y. Ko

  • Toward Robust Information: Data Quality and Inter-Rater Reliability in the American College of Surgeons National Surgical Quality Improvement Program

    Mira Shiloach;Stanley K. Frencher;Janet E. Steeger;Katherine S. Rowell

  • The aging population and its impact on the surgery workforce.

    David A. Etzioni;Jerome H. Liu;Melinda A. Maggard;Clifford Y. Ko

  • Optimal Preoperative Assessment of the Geriatric Surgical Patient: A Best Practices Guideline From the American College of Surgeons National Surgical Quality Improvement Program and the American Geriatrics Society

    Warren B. Chow;Ronnie A. Rosenthal;Ryan P. Merkow;Clifford Y. Ko

  • American College of Surgeons and Surgical Infection Society: Surgical Site Infection Guidelines, 2016 Update

    Kristen A. Ban;Kristen A. Ban;Joseph P. Minei;Christine Laronga;Brian G. Harbrecht

  • Extent of surgery affects survival for papillary thyroid cancer.

    Karl Y. Bilimoria;David J. Bentrem;Clifford Y. Ko;Clifford Y. Ko;Andrew K. Stewart

  • First Report from the American College of Surgeons -- Bariatric Surgery Center Network: Laparoscopic Sleeve Gastrectomy has Morbidity and Effectiveness Positioned Between the Band and the Bypass

    Matthew M. Hutter;Bruce D. Schirmer;Daniel B. Jones;Clifford Y. Ko

  • Does surgical quality improve in the American College of Surgeons National Surgical Quality Improvement Program: an evaluation of all participating hospitals.

    Bruce L. Hall;Barton H. Hamilton;Karen Richards;Karl Y. Bilimoria

  • Small bowel cancer in the United States: changes in epidemiology, treatment, and survival over the last 20 years.

    Karl Y Bilimoria;David Jason Bentrem;Jeffrey D Wayne;Clifford Y. Ko;Clifford Y. Ko

  • Underlying Reasons Associated With Hospital Readmission Following Surgery in the United States

    Ryan P. Merkow;Mila H. Ju;Mila H. Ju;Jeanette W. Chung;Bruce L. Hall

  • Updated population-based review of carcinoid tumors.

    Melinda A Maggard;Jessica B O'Connell;Clifford Y Ko

  • Quality improvement in surgery: the American College of Surgeons National Surgical Quality Improvement Program approach.

    Angela M. Ingraham;Karen E. Richards;Bruce L. Hall;Bruce L. Hall;Clifford Y. Ko;Clifford Y. Ko

  • Preoperative Predictors of Weight Loss Following Bariatric Surgery: Systematic Review

    Masha Livhits;Cheryl Mercado;Irina Yermilov;Janak A. Parikh

  • National Failure to Operate on Early Stage Pancreatic Cancer

    Karl Y. Bilimoria;David J. Bentrem;Clifford Y. Ko;Clifford Y. Ko;Andrew K. Stewart

  • Optimizing ACS NSQIP Modeling for Evaluation of Surgical Quality and Risk: Patient Risk Adjustment, Procedure Mix Adjustment, Shrinkage Adjustment, and Surgical Focus

    Mark E. Cohen;Clifford Y. Ko;Clifford Y. Ko;Karl Y. Bilimoria;Karl Y. Bilimoria;Lynn Zhou

  • Optimal Perioperative Management of the Geriatric Patient: A Best Practices Guideline from the American College of Surgeons NSQIP and the American Geriatrics Society

    Sanjay Mohanty;Sanjay Mohanty;Ronnie A. Rosenthal;Marcia M. Russell;Mark D. Neuman

  • Complication Rates Following Open Reduction and Internal Fixation of Ankle Fractures

    Nelson F. SooHoo;Lucie Krenek;Michael J. Eagan;Barkha N. Gurbani

  • Validation of the 6th edition AJCC Pancreatic Cancer Staging System: report from the National Cancer Database.

    Karl Y Bilimoria;Karl Y Bilimoria;David Jason Bentrem;Clifford Y. Ko;Clifford Y. Ko;Jamie Ritchey

Frequent Co-Authors

Karl Y. Bilimoria
Karl Y. Bilimoria Indiana University
David J. Bentrem
David J. Bentrem Northwestern University
David P. Winchester
David P. Winchester American College of Surgeons
Mark S. Talamonti
Mark S. Talamonti NorthShore University HealthSystem
Patricia A. Ganz
Patricia A. Ganz University of California, Los Angeles
Katherine L. Kahn
Katherine L. Kahn University of California, Los Angeles
Robert H. Brook
Robert H. Brook RAND Corporation
Justin B. Dimick
Justin B. Dimick University of Michigan–Ann Arbor
David B. Hoyt
David B. Hoyt American College of Surgeons
Paul G. Shekelle
Paul G. Shekelle RAND Corporation

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