* indicates required field
Log of changes to Standards Volume II, V21 since publication on 08/14/2020
| Date | Item # | Item Name | Field | Change | Note |
| 8/17/2020 | 1060 | TNM Edition Number | Allowable Values | Added 09 | |
| 8/17/2020 | 1060 | TNM Edition Number | Codes | Added 09: Updated 08 | |
| 8/24/2020 | 880 | TNM Path T | Required Status | NPCR updated | |
| 8/24/2020 | 890 | TNM Path N | Required Status | NPCR updated | |
| 8/24/2020 | 900 | TNM Path M | Required Status | NPCR updated | |
| 8/24/2020 | 910 | TNM Path Stage Group | Required Status | NPCR updated | |
| 8/24/2020 | 920 | TNM Path Descriptor | Required Status | NPCR updated | |
| 8/24/2020 | 940 | TNM Clin T | Required Status | NPCR updated | |
| 8/24/2020 | 950 | TNM Clin N | Required Status | NPCR updated | |
| 8/24/2020 | 960 | TNM Clin M | Required Status | NPCR updated | |
| 8/24/2020 | 970 | TNM Clin Stage Group | Required Status | NPCR updated | |
| 8/24/2020 | 980 | TNM Clin Descriptor | Required Status | NPCR updated | |
| 8/24/2020 | 990 | TNM Clin Staged By | Required Status | NPCR updated | |
| 8/24/2020 | 1060 | TNM Edition Number | Required Status | NPCR updated | |
| 8/24/2020 | 1989 | Over-ride Site/TNM-StgGrp | Required Status | NPCR updated | |
| 8/24/2020 | 1992 | Over-ride TNM Stage | Required Status | NPCR updated | |
| 8/24/2020 | 1993 | Over-ride TNM Tis | Required Status | NPCR updated | |
| 8/24/2020 | 3650 | NPCR Derived Clin Stg Grp | Required Status | NPCR updated | |
| 8/24/2020 | 3655 | NPCR Derived Path Stg Grp | Required Status | NPCR updated | |
| 8/24/2020 | 3769 | Over-ride CS 20 | Required Status | NPCR updated | |
| 8/24/2020 | 3842 | Gleason Tertiary Pattern | Required Status | NPCR updated | To R* |
| 8/31/2020 | 3842 | Gleason Tertiary Pattern | Required Status | NPCR updated | from R* to RS* |
| 8/31/2020 | 3919 | EOD Prostate Pathologic Extension | Required Status | SEER updated | |
| 9/18/2020 | 1506 | Phase I Radiation Treatment Modality | Allowable Values | Added Value 98 | |
| 9/18/2020 | 1516 | Phase II Radiation Treatment Modality | Allowable Values | Added Value 98 | |
| 9/18/2020 | 1526 | Phase III Radiation Treatment Modality | Codes | Added Value 98 | |
| 9/18/2020 | 1516 | Phase II Radiation Treatment Modality | Codes | Added Code 98 | |
| 9/18/2020 | 1526 | Phase III Radiation Treatment Modality | Codes | Added Code 98 | |
| 10/29/2020 | 2140 | CoC Coding Sys--Current | Codes | Updated Code 09 | |
| 10/29/2020 | 2150 | CoC Coding Sys--Original | Codes | Updated Code 09 | |
| 10/29/2020 | 1035 | AJCC TNM Path N Suffix | Codes | Updated Code (f) | |
| 10/29/2020 | 1036 | AJCC TNM Post Therapy Path (yp) N Suffix | Codes | Updated Code (sn) | |
| 10/29/2020 | 1065 | AJCC TNM Post Therapy Clin (yc) N Suffix | Codes | Updated Codes (sn) and (f) | |
| 10/29/2020 | 3919 | EOD Prostate Pathologic Extension | Source of Standard | Changed from NAACCR to SEER | |
| 11/23/2020 | 3850 | HER2 IHC Summary | Required Status | CCCR updated | From RS* to RH* |
| 11/23/2020 | 3854 | HER2 ISH Summary | Required Status | CCCR updated | From RS* to RH* |
| 5/26/2021 | 3836 | FIGO Stage | Codes | Re-added Coded 97 | Fixed Error |
| 5/26/2021 | 3836 | FIGO Stage | Allowable Values | Re-added Coded 98 | Fixed Error |
| 5/26/2021 | 3939 | EGFR Mutational Analysis | Codes | Changed Code #3 to Code #4 | Fixed Error |
| 5/26/2021 | 3899 | Number of Examined Para-Aortic Nodes | Codes | Removed word "positive" from code X9 | Fixed typo |