Diana Salas appeals the judgment affirming the decision by the Commissioner of Social Security to deny her applications for disability benefits and supplemental security income. Our review is limited to determining whether the Commissioner applied the proper legal standards and whether the decision is supported by substantial evidence on the record as a whole. See Greenspan v. Shalala, 38 F.3d 232, 236 (5th Cir. 1994). We may not reweigh the evidence or try the issue de novo. See Johnson v. Bowen, 864 F.2d 340, 343 (5th Cir. 1988). The record shows that the ALJ applied the proper legal standards and that the Commissioner’s decision is supported by substantial evidence. See Greenspan, 38 F.3d at 236.

Salas argues that the ALJ failed to properly consider the effects of her migraine headaches and the opinion of the physician who treated her for those headaches. The administrative record reflects that there was good cause for not according controlling weight to Dr. Carmen Montoya’s opinion, which was conclusional and inconsistent with other substantial evidence in the record. See Greenspan, 38 F.3d at 237.

Relying on the testimony of Dr. Harold Cooper, the medical expert (“ME”), Salas argues that the ALJ erred in determining that she retained the residual functional capacity (“RFC”) to perform her past relevant work and in posing a hypothetical question to the vocational expert without including the limitations that the ME had attributed to her. The substantial evidence in the administrative record supports the ALJ’s rejection of the ME’s opinion on Salas’s limitations. Thus, there was no error with respect to the ALJ’s determination on Salas’s RFC or in the hypothetical question posed to the vocational expert.

Salas also argues that the ALJ improperly drew inferences regarding her credi *449 bility and the severity of her impairments based on her failure to obtain treatment or medication due to poverty. The ALJ’s opinion pointed out discrepancies between Salas’s assertions and the documented signs, findings, diagnoses, and treatment of record. The ALJ also pointed out inconsistencies between Salas’s statements to Dr. Gonzales and her testimony at her administrative hearing. The ALJ’s credibility determination is entitled to great deference, Falco v. Shalala, 27 F.3d 160, 164 (5th Cir. 1994), and will not be disturbed on the record before us.

AFFIRMED.