Centers & Specialties

Cancer Center

Digestive Healthcare Center

Clinical Interests
  • Cancer prevention
  • Gastroenterology
  • Colon and rectal cancer
  • Hereditary colorectal cancer
  • Gastrointestinal cancer
Medical Education
  • MD, Harvard Medical School
  • M.P.H., Harvard School of Public Health
  • Residency, Massachusetts General Hospital
  • Fellowship, Massachusetts General Hospital
Board Certifications
  • Gastroenterology
  • Boston: Massachusetts General Hospital
Insurances Accepted
  • Aetna Health Inc.
  • Beech Street
  • Blue Cross Blue Shield - Blue Care 65
  • Blue Cross Blue Shield - Indemnity
  • Blue Cross Blue Shield - Managed Care
  • Blue Cross Blue Shield - Partners Plus
  • Centene/Celticare
  • Cigna (PAL #'s)
  • Fallon Community HealthCare
  • Great-West Healthcare (formally One Health Plan)
  • Harvard Pilgrim Health Plan - other
  • Harvard Pilgrim Health Plan - PBO
  • Health Care Value Management (HCVM)
  • Humana/Choice Care PPO
  • Medicaid
  • Medicare
  • Medicare - ACD
  • Neighborhood Health Plan - ACD
  • Neighborhood Health Plan - PBO
  • OSW - Maine
  • OSW - New Hampshire
  • OSW - Rhode Island
  • OSW - Vermont
  • Private Health Care Systems (PHCS)
  • Railroad Medicare
  • Railroad Medicare - ACD
  • Senior Whole Health
  • TriCare
  • Tufts Health Plan
  • Unicare
  • United Healthcare (non-HMO) - ACD
  • United Healthcare (non-HMO) - PBO
Patient Age Group

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Research & Publications


View my most recent publications at PubMed

  1. Nishihara R, Wu K, Lochhead P, Morikawa T, Liao X, Qian ZR, Inamura K, Kim SA, Kuchiba A, Yamauchi M, Imamura Y, Willett WC, Rosner BR, Fuchs CS, Giovannucci E, Ogino S , Chan AT (co-senior authors). Long-term colorectal-cancer incidence and mortality after lower endoscopy. N Engl J Med 2013. 369(12):1095-105.
  2. Nishihara R, Lochhead P, Kuchiba A, Jung S, Yamauchi M, Liao X, Imamura Y, Qian ZR, Morikawa T, Wang M, Spiegelman D, Cho E, Giovannucci E, Fuchs CS, Chan AT , Ogino S (co-senior authors). Aspirin use and risk of colorectal cancer according to BRAF mutation status. JAMA. 2013. 309: 2563-71. PMCID: PMC3743040
  3. Liao X, Lochhead P, Nishihara R, Morikawa T, Kuchiba A, Yamauchi M, Imamura Y, Qian Z, Baba Y, Shima K, Meyerhardt JA, Giovannucci E, Fuchs CS, Chan AT , Ogino S (co-senior authors). Aspirin use, PIK3CA mutation, and colorectal cancer survival. N Engl J Med. 2012; 367: 1596-606. PMCID: PMC3532946
  4. Chan AT, Ogino S, Giovannucci EL, Fuchs CS. Inflammatory markers are associated with risk of colorectal cancer and chemopreventative response to anti-inflammatory drugs. Gastroenterology. 2011. 140(3): 799-808. PMCID: PMC3049858
  5. Chan AT, Ogino S, Fuchs CS. Aspirin use and survival after diagnosis of colorectal cancer. JAMA. 2009;302(6):649-58. PMCID: PMC2848289. Chan AT, Ogino S, Fuchs CS. Aspirin and the risk of colorectal cancer in relation to the expression of COX-2. N Engl J Med. 2007;356(21):2131-42.

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News & Events


Gastroenterology Associates
55 Fruit Street
Boston MA, 02114-2696
Phone: 617-726-3212
Fax: 617-724-6832

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