COVID-19 UPDATE: Please note that CDR staff members are working remotely until September 8th. Most services for CDR’s credentialed practitioners remain uninterrupted. CDR staff members are available by telephone at 800/877-1600, ext. 5500, by email at or by live chat from 8:30 am until 5:00 pm CST. If you recently mailed physical items of timely importance, please contact CDR. For a staff list click here

Please refer to our COVID- 19 Update page for information on Pearson VUE and PSI exam center closures and other impacted services.  CDR will continue to monitor the situation and update this page as necessary.

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Board Certified Specialist in Oncology Nutrition (CSO)

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Alabama 5 Alaska 1 Arizona 13
Arkansas 1 California 73 Colorado 26
Connecticut 22 Delaware 1 Florida 38
Georgia 26 Idaho 8 Illinois 36
Indiana 13 Iowa 8 Kansas 8
Kentucky 11 Louisiana 7 Maine 3
Maryland 19 Massachusetts 16 Michigan 31
Minnesota 14 Missouri 12 Montana 4
Nebraska 4 Nevada 2 New Hampshire 5
New Jersey 29 New York 52 North Carolina 33
North Dakota 2 Ohio 25 Oklahoma 6
Oregon 18 Pennsylvania 49 Rhode Island 4
South Carolina 9 Tennessee 10 Texas 61
Utah 5 Vermont 3 Virginia 24
Washington 33 West Virginia 1 Wisconsin 23
Canada 1 Foreign 1   

*This information is based on self-reported data from the Academy of Nutrition and Dietetics database. These numbers may change frequently.