Phones and Live Chat are not available today. CDR Staff will respond to emails and voicemails within 48 business hours.
Registry Statistics
Board Certified Specialist in Oncology Nutrition (CSO)
As of September 28, 2026
By Region
| Alabama | 6 | Alaska | 2 | Arizona | 21 |
| Arkansas | 8 | California | 102 | Colorado | 32 |
| Connecticut | 18 | Delaware | 1 | District of Columbia | 1 |
| Florida | 65 | Georgia | 40 | Hawaii | 1 |
| Idaho | 9 | Illinois | 38 | Indiana | 9 |
| Iowa | 8 | Kansas | 2 | Kentucky | 10 |
| Louisiana | 9 | Maine | 7 | Maryland | 17 |
| Massachusetts | 30 | Michigan | 27 | Minnesota | 12 |
| Mississippi | 1 | Missouri | 23 | Montana | 6 |
| Nebraska | 4 | Nevada | 7 | New Hampshire | 5 |
| New Jersey | 39 | New Mexico | 3 | New York | 81 |
| North Carolina | 46 | North Dakota | 1 | Ohio | 39 |
| Oklahoma | 3 | Oregon | 23 | Pennsylvania | 50 |
| Puerto Rico | 1 | Rhode Island | 2 | South Carolina | 9 |
| South Dakota | 1 | Tennessee | 13 | Texas | 75 |
| Utah | 5 | Vermont | 2 | Virginia | 35 |
| Washington | 33 | West Virginia | 1 | Wisconsin | 25 |
| Foreign | 1 |