OPINION
Rоbert Vega (“Plaintiff”) appeals from the trial court’s order dismissing with prejudice his tort action against Gregg Morris and others (“Defendants”). We reverse the dismissal and remand to the trial court for proceedings consistent with this opinion.
FACTS AND PROCEDURAL HISTORY
When reviewing a dismissal for failure to state a claim upon which relief may be granted, this court assumes the truth of the allegations in the complaint and will uphold the dismissal only if the plaintiff is not entitled to relief under the facts stated in the complaint.
See Menendez v. Paddock Pool Const. Co.,
Plaintiff underwent surgery between June 16 and 24, 1989, to repair his broken right ankle. On June 28, 1989, he entered thе Maricopa County Jail wearing a cast on his right leg. Shortly thereafter, Plaintiff was ordered to get into a shower. Plaintiff protested and informed the officer that his cast *528 was to be kept dry, at which time he was given a plastic bag to cover the cast and again orderеd into the shower. Plaintiff complied. When he was ordered out of the shower, the plastic bag was filled with water and Plaintiff’s cast was wet.
On Friday, June 30, 1989, a nurse examined his leg and, upon noting that the cast was wet, informed Plaintiff that there was nothing he could do but refer Plaintiff to a doctor оn Monday, July 3, 1989. It was not until Thursday, July 6, 1989, that Plaintiff was examined by Defendant Morris, a physician’s assistant, who smelled a foul odor emanating from the cast which was still wet. Defendant Morris, who was “upset or angry” because Plaintiffs condition was not reported sooner to the health unit, removed the сast and discovered that Plaintiffs ankle was infected. Defendant Morris prescribed antibiotics for the infection, placed Plaintiffs leg in a new cast, and indicated that he would examine Plaintiff in seven days.
When Defendant Morris examined Plaintiff on July 13, 1989, he discovered that the infection had spread and prescribed more antibiotics for Plaintiff. One week later, on July 20, 1989, Defendant Morris again removed the cast, only to find that the infection had spread “over a large area of the foot and ankle.” Plaintiff also had a fever at this time. Plaintiff was transferrеd to the infirmary, was medicated intravenously, and was placed in a new cast that was left open at the ankle.
By August 3, 1989, Plaintiffs fever had decreased and Defendant Morris indicated that the infection had subsided. The intravenous medication was stopped, but the fever returned one day later. By August 8, 1989, Plaintiffs condition had deteriorated to such a point that he was transferred to the Maricopa County Medical Center. It was diagnosed that Plaintiff had gangrene which developed because his ankle wound became infected in the wet cast and also because the infection previously had not been treated effectively. Plaintiff underwent surgery the same day; his leg was not amputated because he refused to give consent to the doctors.
On or about August 12,1989, doctors operated on Plaintiff again, this time to rebuild his аnkle with parts of his upper torso and chest cavity. Plaintiff recovered and eventually returned to the Maricopa County Jail on September 11, 1989. He was transferred to prison on January 11, 1990. While imprisoned, Plaintiff underwent additional surgeries on February 19, 1991, April 9, 1991, and February 11, 1992.
On March 3, 1993, Plaintiff filed his complaint. Defendants filed their answer on March 30,1993, denying all of Plaintiffs allegations. Then, on January 31, 1994, Defendants filed a motion to dismiss pursuant to Rule 12(b)(1), (2), and (6), Arizona Rules of Civil Procedure, arguing that Plaintiffs claim was barred by the statute of limitations. After both parties briefed this motion, the trial cоurt dismissed Plaintiffs complaint with prejudice on April 11, 1994.
On May 11, 1994, Plaintiff timely filed this appeal in which he argues that the trial court erred by dismissing his complaint with prejudice because it incorrectly applied Arizona Revised Statutes Annotated (“A.R.S.”) section 12—502(B) (1992). 1 We have jurisdiction pursuant to A.R.S. section 12-2101(B) (1994).
DISCUSSION
Plaintiff contends that the trial court erroneously concluded that he failed to file his complaint within the statute of limitations period. We agree.
A Statute of Limitations.
A.R.S. section 12-542 (1992) establishes the applicable statute of limitations period for this action, and provides:
Except as provided , in [A.R.S. section] 12-551 there shall be commenced and prosecuted within two years after the cause of action accrues, and not afterward, the following actions:
*529 1. For injuries done to the person of another including causes of action for medicаl malpractice as defined in [A.R.S. section] 12-561.
Arizona courts have recognized that a cause of action “accrues” when a plaintiff knows or reasonably should have known of a defendant’s negligent conduct.
Sato v. Van Denburgh,
Here, Plaintiffs complaint demonstrates that he discоvered or reasonably should have discovered the arguably negligent conduct of Defendants no later than August 8, 1989, when he was admitted into the Maricopa County Medical Center. It was at that point that he had a fever, that his ankle and foot were diagnosed to have gаngrene, and that he learned that immediate surgery was necessary—all because his cast got wet in the shower and because the resulting infection was not treated effectively earlier. Therefore, because Plaintiffs cause of action accrued no later than August 8, 1989, the statute of limitations on this action ran on August 8, 1991, unless it otherwise was tolled.
B. Tolling Pursuant to AR.S. Section 12-502(B).
AR.S. section 12-502(B) provides:
If a person entitled to bring an action ... is at the time the cause of action accrues imprisoned, the period of such disability shall exist only until such time as the person imprisoned discovers the right to bring the action or with the exercise of reasonable diligence should have discovered the right to bring the action, whichever occurs first, and such person shall have the same time after the disability ceases to exist which is allowed to others.
This statute was first interpreted in
Zuck v. State,
Plaintiffs remaining claim ... could have been time barred as early as August 1985 if he was aware of his right to bring the action when the amended statute took effect in August 1984. However, summary judgment on the statutory duty claim would need to be supported by a finding of his awareness; in the absenсe of such a finding in the present record we must remand that claim to the trial court for determination of when plaintiff discovered or reasonably should have discovered the existence of this claim. See Sato v. Van Denburgh,123 Ariz. 225 ,599 P.2d 181 (1979). The applicable one-year [statute of limitations] period ... should apply from that point to determine whether the claim was barred in February 1986 when plaintiff filed his complaint.
Id.
at 40-41,
Two decisions have since addressed when the period of conditional disability for prisoners ends as interpreted by
Zuck.
First, in
Vaughan v. Grijalva,
*530 Two of this court. There, the court also cited Zuck but reached a conclusion different from that reached in Vaughan, stating:
“The discovery rule applies to the facts which give rise to the cause of action, not to the legal significance of such facts.” [Citation omitted.] We believe that principle equally applicable to the provision of A.R.S. [section] 12-502(B) that one imprisoned has the statute [of limitatiоns] tolled until he “discovers the right to bring the action or with the exercise of reasonable diligence should have discovered the right to bring the action.” While discovery of “the right to bring the action” could be interpreted expansively to mean knowledge of legal rights, we can discern no reason why the legislature would want the statute [of limitations] to run against law-abiding persons ignorant of the legal significance of known facts but not against imprisoned criminals similarly ignorant. We therefore reject the apparently contrary construction in Vaughan v. Grijalva,927 F.2d 476 (9th Cir.1991).
In construing a statute, our primary purpose is to “detеrmine and give effect to the legislative intent behind the statute.”
State v. Korzep,
We believe Vaughan expresses the better construction of A.R.S. section 12-502(B) and Zuck. First, we recognize that the plain language of this statute supports the conclusion that a prisoner’s conditional disability ends when such prisoner discovers or reasonably should have discovered the right to bring an action, not the conduct creating the right to bring an action. Indeed, the legislature identified two separate occurrences in A.R.S. 12-502(B): (1) the “time the cause of action accrues;” and (2) the “time ... [a prisoner] disсovers the right to bring the action or with the exercise of reasonable diligence should have discovered the right to bring the action—” The use of these different terms within the same sentence of this statute is strong evidence suggesting that the legislature distinguished between these ocсurrences.
Second, this construction of A.R.S. section 12-502(B) is further supported by the fact that we would render this statute meaningless were we to follow Jimenez. If a prisoner’s period of disability ends at the time such prisoner discovers or reasonably should have discovered conduct сreating the right to bring a legal action, then as a matter of law the period of disability ends at the same time a prisoner’s cause of action accrues. Accordingly, there would never be a period of disability after the cause of action accrues. Suсh a result does not comport with the history of A.R.S. section 12-502(B). Former A.R.S. section 12-502 established an absolute disability for prisoners that lasted for the duration of imprisonment for any claim accruing while imprisoned. When amending this statute in 1984, the legislature could have been persuaded by the policy considerations recognized in Jimenez and eliminated this disability entirely. Instead, it established a conditional disability for prisoners with the present version of A.R.S. section 12-502(B). Considering both the statute’s plain meaning and historical context, we would violate the legislative intent were wе to construe it as in Jimenez. Regardless of wheth *531 er we agree or disagree with the policy 3 the legislature is attempting to effectuate, our obligation as a court is to interpret this statute so as to avoid rendering it meaningless.
Therefore, we hold that a prisoner’s period of disability ends pursuant to A.R.S. section 12-502(B) when such prisoner discovers or reasonably should have discovered the right to bring the action, not the conduct creating the cause of action. 4
Here, when dismissing Plaintiffs complaint, the trial court found:
It appears that the [P]laintiff discovered or should have discovered the [Defendants’ alleged wrong more than two years before he filed his complaint. While he may not havе known of all the consequences of that alleged wrong more than two years before he filed, he appears to have known of some of them.
The court’s finding does not address when Plaintiff discovered or should have discovered his right to bring the action against Defendants. As in
Vaughan,
there is nothing on the face of the complaint that indicates to us when Plaintiff discovered his right to bring his action.
See
CONCLUSION
Because the trial court applied the wrong standard, we reverse the dismissal of Plaintiffs complaint and remand this matter for further proceedings consistent with this opinion.
Notes
. Plaintiff alternatively contends that the statute of limitations was tolled because he delayed filing his civil complaint out of a fear of retaliation by prison officials. Because our resolution of a prisoner's disability pursuant to A.R.S. section 12-502(B) is dispositivе of the present appeal, we need not explore this issue.
. Prior to its amendment in 1984, former A.R.S. section 12-502 established an absolute disability for prisoners, and provided:
If a person entitled to bring an action ... is at the time the cause of action accrues ... imprisoned, the period of such disability shall not be deemed a portion of the period limited for commencement of the action. Such person shall have the same time after removal of the disability which is allowed to others.
. This court has noted that A.R.S. section 12-502 "provides for the tolling of the statute of limitations during periods of minority, imprisonment[,] or insanity____ The statute is based on a public policy that it would be inequitable to hold persons under such disabilities to strict time limitations for filing legitimate claims.”
Ulibarri v. Gerstenberger,
. We can envision factual circumstances in which a prisoner simultaneously would discover both the conduct creating a cause of action and the right to bring such action. Our holding today merely establishes that these occurrences do not necessarily occur simultaneously as a matter of law.