Shall I pursue it or drop it?

On Sept. 11th. I was riding my bicycle on the sidewalk along Countryway Blvd. near Boysenberry Drive in Tampa /Westchase, when I hit a section of broken sidewalk not evident from my direction of approach. However, the cracked sidewalk had been marked with paint visible mainly from the opposite direction. I learned this later; after my front wheel struck the broken sidewalk throwing me from the bike and breaking my collarbone. Helpful passersby called paramedics; I went to the Tampa Community Hospital emergency room, where the clavicle fracture was confirmed by x-rays. On September 13th I consulted an orthopedic specialist who recommends surgery to fix my collarbone. I have health insurance that should cover a portion—though not all--of the medical costs. I believe the sidewalk was substantially damaged; that the damage was previously known, and should have been closed pending repairs. Please advise whether I might have a case likely to result in a reimbursement settlement.