In the Matter of the Worker's Compensation Claim Of: Jaime Guerrero v. State of Wyoming, ex rel., Department of Workforce Services, Workers' Compensation Division
2015 WY 88
Wyo.2015Background
- June 8, 2011: Guerrero, a welder, was struck in the front/left lower body by a 13‑lb valve; treated for blunt abdominal trauma and hematoma and received benefits for groin/abdomen/leg/knee injuries.
- He was out of work ~3 months, underwent surgery for hematoma, used pain medication, and completed work‑hardening; initially cleared to return to work in September 2011.
- Reports of new or worsening low‑back pain were not made until October–November 2011; neurologic evaluation diagnosed meralgia paresthetica and MRI (Dec. 2011) showed degenerative change and disc tears at multiple lumbar levels.
- Dr. Mosquera testified the disc tears could be caused by degeneration, lifting, high‑velocity trauma, or occupational factors but could only say it was “possible” the June 2011 event caused or aggravated the discs; he declined to state causation to a medical probability standard.
- The Division denied coverage for lumbar evaluation/treatment; OAH held a contested case hearing and denied benefits for the lumbar condition for lack of causation; the district court affirmed and this appeal followed.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Whether substantial evidence supports OAH’s finding that Guerrero failed to prove his lumbar condition was caused by the June 8, 2011 work accident | Guerrero: his lack of prior back symptoms and temporal development support causation; Dr. Mosquera’s opinion and his testimony suffice | Division/OAH: medical testimony failed to establish causation to a medical‑probability standard; Dr. Mosquera only said causation was possible; timing and records undermine claimant’s history | Held: Affirmed — substantial evidence supports OAH; Dr. Mosquera’s equivocal “possible” opinion insufficient for causation; claimant failed burden |
| Whether the second compensable injury rule applies to cover the lumbar condition as a ripening/aggravation of the compensable June 8 injury | Guerrero: the initial compensable injury ripened into a lumbar condition entitling him to benefits under the second injury rule | Division/OAH: claimant produced no evidence that the initial front‑of‑body injury materially contributed to the subsequent lumbar condition | Held: Affirmed — OAH applied the rule and claimant failed to show the initial injury contributed to the lumbar condition |
Key Cases Cited
- Boyce v. State ex rel. Wyo. Workers' Safety & Comp. Div., 105 P.3d 451 (Wyo. 2005) (medical opinions expressed as mere possibilities are insufficient to meet claimant's burden)
- Thornberg v. State ex rel. Wyo. Workers' Comp. Div., 913 P.2d 863 (Wyo. 1996) (medical testimony not always required when a single incident immediately and directly produces injury)
- Stevens v. State ex rel. Dept. of Workforce Servs., 338 P.3d 921 (Wyo. 2014) (defines medical‑probability standard and rejects Murray rationale when symptom reporting/delay undermines immediacy)
- Murray v. State ex rel. Wyo. Workers' Safety & Comp. Div., 993 P.2d 327 (Wyo. 1999) (prior good health and immediate symptom development may establish causation without medical testimony)
- Dutcher v. State ex rel. Wyo. Workers' Safety & Comp. Div., 223 P.3d 559 (Wyo. 2010) (administrative review standards and claimant burden on causation)