Women's Refuge says ACC needs to stop treating sensitive claims the same as physical injuries.
Figures obtained under the Official Information Act show only 5 percent sexual abuse claims lodged with ACC are accepted.
The principal policy advisor at Women's Refuge, Natalie Thorburn, that's because a large number of survivors drop out of the process because they're put off by having to undergo a formal assessment.
The ACC Minister Carmel Sepuloni says she's asked the agency for more information on why survivors are not undergoing assessments.
Where to get help:
Victim Support 0800 842 846
Rape Crisis 0800 88 33 00
HELP Call 24/7 (Auckland): 09 623 1700, (Wellington): be 04 801 6655 - 0
Safe to talk: a 24/7 confidential helpline for survivors, support people and those with harmful sexual behaviour: 0800044334.
Mosaic - Tiaki Tangata Peer support for males who have experienced trauma and sexual abuse: 0800 94 22 94
Women's Refuge: (0800 733 843)
It's Not OK (0800 456 450)
Shine: 0508 744 633
Victim Support: 0800 650 654
HELP Call 24/7 (Auckland): 09 623 1700, (Wellington): be 04 801 6655 - 0
The National Network of Family Violence Services NZ has information on specialist family violence agencies.
Lifeline: 0800 543 354 or text HELP to 4357
Suicide Crisis Helpline: 0508 828 865 / 0508 TAUTOKO (24/7). This is a service for people who may be thinking about suicide, or those who are concerned about family or friends.
Depression Helpline: 0800 111 757 (24/7) or text 4202
Samaritans: 0800 726 666 (24/7)
If it is an emergency and you feel like you or someone else is at risk, call 111.