Malpractice? Just want him to pay the bills.....

My husband has a vasectomy in June. After his scrotum swelled up. He went back to the dr 3x w/ pain, etc. The dr continued to tell him that it was a hematoma & that it would go away. By 3 wks my husband was vomiting & feeling sick & weak. We went to the emergency room where we found out he had infection running through his blood. They said they didn't have a urologist to operate tho so we would have to go back to our dr on monday. Long story short, the dr ended up doing surgery after i begged him to. he had told me previously that any care following the vasectomy was considered part of it & i wouldn't have to pay extra. Now he is backing off that & will not pay the bills for my husbands 2 night stay & surgery at the hospital b/c of HIS misdiagnosis. Is there something here?