OPINION OF THE COURT
Minor child Elena Lawson (“Elena”) was covered under a health insurance policy that her father bought from Defendant, Fortis Insurance Company. Two days pri- or to the effective date of the policy, Elena went to the emergency room for treatment of what was initially diagnosed as a respiratory tract infection, but which was discovered to be leukemia one week later, after the effective date of the policy. For-tis denied coverage of medical expenses relating to the leukemia on the ground that it was a pre-existing condition for which Elena had received treatment prior to the effective date of the policy. Elena’s parents (“Plaintiffs”), acting on her behalf, sued for breach of contract, and the District Court granted their motion for summary judgment.
In this appeal, Fortis argues that the pre-existing condition language of the insurance policy does not require accurate diagnosis of the condition, but merely receipt of treatment or advice for the symptoms of it. Fortis claims that because Elena was treated for symptoms of leukemia before the effective date of the insurance policy, the leukemia was a preexisting condition. Plaintiffs respond that the leukemia was not pre-existing because one cannot receive treatment “for” a condition without knowledge of what the condition is. We find that Plaintiffs’ reading of the pre-existing condition language is reasonable and that the ambiguity in the policy should be construed against the insurance company. Therefore, we affirm the District Court’s grant of summary judgment for Plaintiffs on their claim for bene *161 fits under the policy. We also affirm the District Court’s grant of summary judgment for Fortis on the Plaintiffs’ bad faith claim.
I.
A.
On October 7, 1998, Joseph Lawson (“Lawson”) purchased the Fortis short-term medical insurance policy to cover himself and his daughter, Elena Lawson. The policy became effective two days later, on October 9. On October 7, the same day Lawson applied for the insurance policy, Elena’s mother, Tammy Malatak, took Elena to the emergency room at Palmer-ton Hospital in Palmerton, Pennsylvania. Elena had a dry, hacking cough, a fever, an elevated pulse rate, and a swollen right eye. The emergency room physician, Dr. Shailesh Parikh, diagnosed Elena with an upper respiratory tract infection and prescribed an antibiotic and anti-allergy medication. Dr. Parikh further advised Ms. Malatak to take Elena for a follow-up visit to her family physician or to bring her back to the emergency room if the symptoms did not improve in a few days. Because the symptoms persisted, on October 13, Ms. Malatak took Elena to the family physician, Dr. Narendra Ambani.
On October 14, 1998, Elena’s grandmother, a registered nurse, took Elena to a pediatrician, Dr. Mira Slizovskaya (“Dr. Slizovsky”), who ordered Elena to undergo more tests and diagnosed her with leukemia. On October 15, Elena was transferred to the Children’s Hospital of Philadelphia (“CHOP”) under the care of Dr. Beverly Lange. At CHOP, Elena underwent chemotherapy and other treatment that has since resulted in the remission of her leukemia.
B.
The insurance policy at issue expressly excludes coverage for a pre-existing condition, which is defined as a “Sickness, Injury, disease or physical condition for which medical advice or treatment was recommended by a Physician or received from a Physician within the five (5) year period preceding that Covered Person’s Effective Date of Coverage.” The policy defines “sickness” as an “illness, disease or condition which is diagnosed or treated while this policy is in force.” There is no dispute that the relevant sickness here is leukemia.
Lawson and Malatak, on behalf of Elena, filed a claim for payment of the CHOP medical bills under the Fortis policy. Dr. Raymond Brumblay, Fortis’s Medical Director, investigated Elena’s course of treatment and concluded that “[w]hile the evaluation [at the Palmerton Emergency Department] failed to diagnose leukemia, advice and treatment for those symptoms were received from a physician. This meets the policy definition of a pre-exist-ing condition.” App. at 96. Dr. Brumblay determined that Elena had a two-and-a-half week history of fever preceding her diagnosis of leukemia, and he therefore concluded that the symptoms for which she was evaluated and treated on October 7, 1998, were those of leukemia. Fortis thus denied Plaintiffs’ claim pursuant to the policy’s pre-existing condition exclusion.
Plaintiffs appealed the denial to Fortis’s Appeal Review Committee, which concluded that the definition of a pre-existing condition does not require a correct diagnosis of the condition at the time that it is treated. Fortis thus denied Plaintiffs’ appeal.
C.
Plaintiffs brought a breach of contract and bad faith action against Fortis for its
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denial of coverage. Plaintiffs moved for summary judgment on the breach of contract claim, and Fortis filed a cross-motion for summary judgment on both claims. The District Court heard oral argument on the motions for summary judgment. The Court granted Plaintiffs’ motion on the breach of contract claim, and granted For-tis’s motion on the bad faith claim.
Lawson v. Fortis Insurance Co.,
The District Court found that the definition of a pre-existing condition under the policy is ambiguous. According to the District Court, the language could be read as providing either a subjective standard requiring an accurate diagnosis of the condition at the time of treatment or an objective standard requiring only general treatment or advice, independent of an accurate diagnosis. Construing ambiguity against the drafter and choosing the contract interpretation most favorable to Plaintiffs, the District Court concluded that “in order to be treated for leukemia, there must have been some awareness that the disease existed at the time treatment or advice was rendered.” Id. at 745. Finding that nobody even suspected leukemia at the time of Elena’s treatment on October 7, 1998, the District Court granted summary judgment for Plaintiffs on the breach of contract claim. The District Court then directed the parties to stipulate as to Plaintiffs’ medical expenses, and on July 27, 2001, the District Court entered judgment against Fortis in the amount of $713,901.12 plus prejudgment interest. Fortis appeals from this judgment. The District Court also granted summary judgment for Fortis on Plaintiffs’ bad faith claim, and Plaintiffs cross-appeal from this judgment. 1
II.
Fortis argues that the insurance policy’s exclusion of pre-existing conditions contains no requirement that the condition be accurately diagnosed or appropriately treated before the effective date of the policy. Fortis claims that the pre-existing condition exclusion applies when a claimant receives medical treatment for the symptoms of a condition that later proves to be one for which coverage is sought under the policy. Thus, Fortis asserts that the District Court’s decision contravened the plain meaning of the policy, principles of contract construction, and clear legal precedent. We disagree.
A.
Straightforward language in an insurance policy should be given its natural meaning. In keeping with the rule of
contra proferentem,
however, ambiguous terms should be strictly construed against the insurer.
Medical Protective Co. v. Watkins,
*163
We review de novo the District Court’s conclusion that the definition of a pre-existing condition in the contract is ambiguous.
Kroblin Refrigerated Xpress, Inc. v. Pitterich,
B.
Both state and federal courts have interpreted pre-existing condition language in health insurance contracts differently. The District Court relied most heavily on
Hughes v. Boston Mutual Life Insurance Co.,
Hughes
notwithstanding, some courts have interpreted language similar to the pre-existing condition provision at issue in this case not to require a diagnosis of the condition.
See, e.g., Bullwinkel v. New England Mutual Life Insurance Co.,
Other courts, however, like the First Circuit in
Hughes,
have reached a different result and found that treatment for a condition requires some awareness on the part of the insured or the physician that the insured is receiving treatment for the condition itself.
See, e.g., Pitcher v. Principal Mutual Life Insurance Co.,
All of these cases involve insurance policies with substantially similar pre-existing *165 condition language and similar factual scenarios. Of the federal courts of appeals, the First, Fifth, and Seventh Circuits have followed the approach taken in this case by the District Court, finding the contract language ambiguous. The Seventh and Eighth Circuits, however, have gone the other way and interpreted pre-existing condition language not to require diagnosis of the condition being treated. Thus, the relevant cases do not dictate a clear answer here.
C.
In this case, Elena did not receive advice or treatment for leukemia before the effective date of coverage, so Plaintiffs’ interpretation of the pre-existing condition language in the Fortis insurance policy should prevail. At a minimum, the contract language is ambiguous, and thus it should be construed against Fortis.
The Fortis insurance policy excludes coverage for a “Sickness, Injury, disease or physical condition for which medical advice or treatment was recommended by a Physician or received from a Physician within the five (5) year period preceding that Covered Person’s Effective Date of Coverage.” There is no doubt that the “sickness” here is leukemia.- Therefore, the key word in the pre-existing condition exclusion for our purposes is “for.” Elena received treatment “for” what were initially diagnosed as symptoms of a respiratory tract infection. Therefore, the treatment she received was not “for” leukemia, but “for” a respiratory tract infection. 4
The word “for” connotes intent. Webster’s Dictionary states that “for” is “used as a function word to indicate purpose.” Webster’s Ninth New Collegiate Dictionary 481 (1986). Black’s Law Dictionary similarly states that the word “connotes the end with reference to which anything is, acts, serves, or is done. In consideration of which, in view of which, or with reference to which, anything is done or takes place.” Black’s Law Dictionary 579-80 (5th ed.1979). The word “for” therefore has an implicit intent requirement. Applied to this case, none of Elena, her parents, and the treating physician, Dr. Par-ikh, intended or even thought on October 7, 1998, that Elena was receiving medical advice or treatment “for” leukemia. In short, it is hard to see how a doctor can provide treatment “for” a condition without knowing what that condition is or that it even exists. Thus, in our view, the best reading of the contract language in this case is for coverage’ of Elena’s leukemia treatment. At worst, the language is ambiguous and must therefore be read in favor of the insureds.
Although Fortis contends that its position is supported by the district court’s decisions in
Cury
and
McWilliams,
those cases are distinguishable. In both
Cury
and
McWilliams,
there was no definite diagnosis, but either the physician or the claimant had a specific concern regarding the patient’s condition. In
Cury,
the doctor suspected multiple sclerosis as “likely” or “most likely” before the effective date of Cury’s insurance policy,
In this case, however, the treatment Elena initially received for a respiratory tract infection was not the appropriate treatment for leukemia, and thus it does not make sense to say that she received treatment “for” leukemia when the actual condition was not suspected and the treatment was in any event wrong. In short, for the purposes of what constitutes a preexisting condition, it seems that a suspected condition without a confirmatory diagnosis is different from a misdiagnosis or an unsuspected condition manifesting nonspecific symptoms, as was the case here. When a patient seeks advice for a sickness with a specific concern in mind {e.g., a thyroid lump, as in McWilliams, or a breast lump, as in Bullwinkel) or when a physician recommends treatment with a specific concern in mind {e.g., a “likely” case of multiple sclerosis, as in Cury), it can be argued that an intent to seek or provide treatment or advice “for” a particular disease has been manifested. But when the patient exhibits only non-specific symptoms and neither the patient nor the physician has a particular concern in mind, or when the patient turns out not to have a suspected disease, it is awkward at best to suggest that the patient sought or received treatment for the disease because there is no connection between the treatment or advice received and the sickness. Here, there is no evidence that the possibility that Elena’s condition was actually leukemia ever entered the minds of Elena’s parents or Dr. Parikh. Therefore, it would not make sense to say that Dr. Parikh offered medical advice or treatment for Elena’s leukemia.
In any event, to the extent that our decision here is at odds with
Cury
and
McWilliams,
we find the analysis in those cases unpersuasive because they focus primarily on the absence of a diagnosis requirement rather than simply construing the language of the policy. That is,
Cury
and
McWilliams
focused exclusively on the absence of a requirement of diagnosis in the insurance policies “without seriously considering whether the language concerning treatment ‘for’ a particular condition is ambiguous.”
Hughes,
Although we base our decision on the language of the policy, we note that considering treatment for symptoms of a not-yet-diagnosed condition as equivalent to treatment of the underlying condition ultimately diagnosed might open the door for insurance companies to deny coverage for any condition the symptoms of which were treated during the exclusionary period. “To permit such backward-looking reinterpretation of symptoms to support claims denials would so greatly expand the definition of preexisting condition as to make that term meaningless: any prior symptom not inconsistent with the ultimate diagnosis would provide a basis for denial.”
In re Estate of Monica Ermenc,
*167
At a minimum,- the pre-existing condition language in Fortis’s insurance policy is susceptible to more than one reasonable interpretation and is therefore ambiguous.
See Myrtil v. Hartford Fire Insurance Co.,
III.
As to Plaintiffs’ bad faith claim, we affirm the District Court’s grant of Fortis’s motion for summary judgment. Although we do not find the cases on which Fortis relies to be persuasive, this authority supports the District Court’s decision on the bad faith issue. Plaintiffs claim that Fortis failed to review all of the medical records and ignored relevant evidence, but without more, this does not rise to the level of frivolous, reckless disregard, or lack of reasonable basis, especially in a situation, like this one, that involves medical records lacking in certainty of diagnosis.
Cf. Terletsky v. Prudential Property and Casualty Insurance Co.,
For the foregoing reasons, we affirm the District Court’s judgment granting Plaintiffs’ motion for summary judgment on the breach of contract claim and granting For-tis’s motion for summary judgment on the bad faith claim.
Notes
. Our standard of review is plenary.
Medical Protective Co. v. Watkins,
. In
Bullwinkel,
however, the Seventh Circuit explicitly limited the reach of its holding to the specific facts of that case.
. In
Pitcher,
the Seventh Circuit distinguished
Bullwinkel,
in which the plaintiff suffered from only breast cancer and not cystic fibrosis as well, as in
Pitcher.
Because Bullwink-el’s visit to the doctor was prompted solely by a concern that the lump in her breast might be cancerous, the visit and subsequent treatment actually “concerned” cancer. In contrast, Pitcher thought her pre-coverage treatment was for cystic fibrosis, but the lump actually turned out later to be cancer.
Pitcher,
. We need not resolve the factual question whether she received treatment for what were actually symptoms of leukemia on October 7, 1998.
