Good afternoon, thank you for your question.
Generally, medical bills are considered an open account (that is, good or services are provided to the customer who is billed, like a credit card). The statute of limitations on such accounts is 5 years under Missouri law. That's Missouri Statute Section 516.120.
If there was a written contract for payment, the statute of limitations would be 10 years, however, pursuant to Missouri Statute Section 516.110.
Please let me know if I have not fully addressed your concerns.
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