Tim Null Rating Services is your first source for all your Permanent Disability Evalutation needs.

We offer private ratings under the AMA (2005) schedule, Old Schedule (1997 pdrs), and the Pre-1997 schedule.

Tim Null has been rating for over 30 years and co-authored the AMA Permanent Disability Schedule.

From 1993 to 2005, Tim Null worked as rater at the Van Nuys and Santa Monica WCAB boards. After the adoption of the new AMA schedule in 2005, he opened his doors as a private rater with a vision to deliver accurate permanent disability ratings for the entire Workers Compensation Community. Since then, he has delivered over 75,000 private ratings.