A Santa Monica resident and cancer patient is going after an Conseco Life Insurance Company for refusing to pay tens of thousands in medical costs she believes were covered under her plan.

Pamela Gross, 63, purchased a cancer insurance policy from Transport Life Insurance Company, which later merged with Conseco, in 1994, a policy she tried to cash in on in 2012 when she was diagnosed with melanoma in her upper left tricep.

She underwent consultation, treatment and two surgical procedures, which resulted in the successful removal of the cancer, and submitted a claim for benefits under the Conseco policy, according to court documents.

The insurer delayed and then underpaid the claim on the grounds that the doctor who treated Gross did not state that the cancer was malignant, according to the suit.

Gross accuses Conseco of failing to act in good faith and breach of contract.