318 P.3d 813
Wyo.2014Background
- Landwehr sustained a compensable August 1999 back/work injury; Division awarded benefits.
- In 2010, Landwehr sought payment for prescription medications tied to the 1999 injury; the Division denied.
- A contested case hearing (2011) upheld the denial; the district court affirmed; Landwehr appealed.
- The sole issue was whether the 2010 headaches were causally related to the 1999 injury; Dr. Hopfensperger testified but lacked complete medical history.
- The record shows multiple normal MRIs, a 2008 Nebraska head/neck injury and settlement, and diagnoses of fibromyalgia/carpal tunnel syndrome with no proven link to the 1999 back injury; credibility issues affected Landwehr’s testimony.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Was there substantial evidence to support no causal link between the 1999 injury and 2010 headaches? | Landwehr contends substantial evidence supports causation. | Division asserts record shows no causative connection. | Yes; substantial evidence supports no causal link. |
| Did the hearing examiner properly discount the medical testimony as to causation given credibility concerns and incomplete history? | Landwehr argues credibility issues undermine the examiner’s weight given to medical testimony. | Division defers to examiner’s credibility determinations and weight assignments. | Yes; credibility findings and weighing of expert evidence were supported. |
| Was expert medical testimony necessary and sufficient to establish causation under the standard used? | Expert testimony should establish that the 1999 injury more likely than not caused the 2010 headaches. | Expert testimony did not establish causation; other evidence lacked connection. | Yes; expert testimony insufficient to prove causation under the record. |
Key Cases Cited
- Mitcheson v. State ex rel. Wyo. Workers’ Safety & Comp. Div., 277 P.3d 725 (Wy. 2012) (burden of proof and causation in workers’ compensation)
- Anastos v. Gen. Chem. Soda Ash, 120 P.3d 658 (Wy. 2005) (causation standard for medical testimony)
- KG Constr., Inc. v. Sherman, 120 P.3d 145 (Wy. 2005) (medical opinion must be more than possible)
- Hampton v. State ex rel. Wyo. Workers’ Safety & Comp. Div., 296 P.3d 934 (Wy. 2013) (direct causation exception; medical evidence not always essential)
- Dale v. S & S Builders, LLC, 188 P.3d 554 (Wy. 2008) (substantial evidence review; weighing evidence and credibility)
- Thornberg v. State ex rel. Wyo. Workers’ Comp. Div., 913 P.2d 863 (Wy. 1996) (causation standards and expert testimony)