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Initial Certification indicates that physicians have met rigorous standards through intensive study, accredited training and evaluation and that they have the clinical judgment, skills and attitudes essential for the delivery of excellent patient care.

MOC is a professionally determined standard that attests that an internist is staying current in knowledge and practice throughout his/her career.

For more than 75 years, Certification by ABIM has stood for the highest standard in internal medicine and its 20 subspecialties.

Check a Doctor's Certification



Timothy John Barreiro

Timothy John Barreiro

Today's Date: May 2, 2016

Current Certification Status:

  • Critical Care Medicine: Certified
  • Pulmonary Disease: Certified
  • Internal Medicine: Certified

Participating in Maintenance of Certification: Yes

Initial Certifications:

  • Internal Medicine: 2001
  • Pulmonary Disease: 2003
  • Critical Care Medicine: 2004

Important information regarding the physician verification tool:

  • Most diplomates certified prior to 1990 are not required to participate in MOC but are strongly encouraged to do so.
  • All ABIM certifications issued in 1990 (1987 for critical care medicine and 1988 for geriatric medicine) and thereafter must be maintained through ABIM's MOC program.
  • ABIM's website serves as primary source verification.
  • Diplomates are publicly reported as participating in MOC for all certifications as long as they are participating in MOC for one certification area.
  • Certification status is updated to this system within 5 days of notification to the physicians. Data elements, such as name changes, are updated in ABIM's records within 24 hours of being processed by ABIM.
  • If you do not find your physician or they are listed as not certified, they may be certified by another board of the American Board of Medical Specialties. Please check www.certificationmatters.org. Additionally, information on Allergy and Immunology, Clinical Laboratory Immunology and Diagnostic Laboratory Immunology diplomates can be now found at www.certificationmatters.org.

For more information about ABIM certification and MOC, go to: