**Note 1:** Grade is applicable for the follicular lymphomas only (9690/3, 9691/3, 9695/3, 9698/3). For all other lymphoma histologies, code 9.
**Note 2:** Clinical grade must not be blank.
**Note 3:** Assign the highest grade from the primary tumor assessed during the clinical time frame.
**Note 4:** Follicular lymphoma grade is based on the absolute number of centroblasts per high-power (40 x objective, 0.159 square mm) microscopic field (HPF).
**Note 5:** Codes 1-5 take priority over L.
**Note 6:** Code 9 when
* Grade from primary site is not documented
* Clinical workup is not done (for example, cancer is an incidental finding during surgery for another condition)
* Grade checked "not applicable" on CAP Protocol (if available) and no other grade information is available
**Note 7:** If there is only one grade available and it cannot be determined if it is clinical or pathological, assume it is a clinical grade and code appropriately per clinical grade categories for that site, and then code unknown (9) for pathological grade, and blank for post therapy grade.