Dr. Claes Nilsson, MD

Dr. Claes Nilsson, MD

Hematology  ·  
Male  ·  
Age 70
Dr. Claes Nilsson, MD is a hematology specialist in Gloucester, MA and has been practicing for 37 years. He graduated from Yale University in 1973 and specializes in hematology, oncology, and more.

298 Washington St

Gloucester, MA 01930

Contact Information

Insurance Accepted

  • Aetna
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield of Louisiana
  • Blue Cross Blue Shield of Massachusetts
  • Cigna
  • First Health (Coventry Health Care)
  • Harvard Pilgrim Health Care
  • Tufts Health Plan

*Please verify this information when scheduling an appointment.

Learn about Dr. Nilsson

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Top Care Areas

See how frequently Dr. Nilsson performs your care needs compared to other doctors.

Brain Disorders
more than 37% of peers
Urinary Disorders
more than 20% of peers
Gastrointestinal Diseases
more than 16% of peers

Dr. Nilsson's percentages are based on the rate of treatment compared to peers nationwide from insurance data. Learn more info about our data and this Top Care Areas component.

3  Specialties

  • Hematology
  • Medical Oncology
  • Oncology

3  Board Certifications

  • Hematology
    Accredited by: American Board of Internal Medicine*
  • Internal Medicine
    Accredited by: American Board of Internal Medicine*
  • Medical Oncology
    Accredited by: American Board of Internal Medicine*

30  Conditions Treated

Background Check

0 Malpractice Claims

No malpractice history found for Massachusetts.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.


  • Yale University
    Medical School | Graduated 1973
  • Med Center Hospital
    Internship Hospital | Completed 1974
  • Med Center Hospital
    Residency Hospital | Completed
  • University Of California San Francisco
    Fellowship Hospital | Completed 1981

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. Nilsson has no media or publications listed.

Languages Spoken

  • English
  • Italian
  • Portuguese
  • Spanish

Memberships & Professional Affiliations

Dr. Nilsson does not have any memberships or affiliations listed. If you are Dr. Nilsson and would like to add memberships or affiliations, please update your profile.

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