I used a warm compress for a few weeks, and though the cyst seemed to get smaller after each use, it would always return to its usual size between warm compresses, and it didn't seem to get any closer to draining. I gradually just stopped with the warm compresses.
Knowing that the lump was "only" a sebaceous cyst, I really wasn't worried about it anymore, even if it wasn't draining or getting smaller.
Meanwhile, I received my bills for the PCP appointment, the diagnostic mammogram, and the ultrasound. For the mammogram and ultrasound, I got one bill from the radiologist, and a separate bill from the Breast Imaging location's affiliated hospital. (My PCP and the Breast Imaging location belong to the same hospital network.)
2/19/19: PCP Appointment: $230
With insurance, I paid only the co-pay: $20
2/21/19: Mammogram & Ultrasound Radiologist: $246
With insurance, I paid: $83.15
2/21/19: Mammogram & Ultrasound Hospital: $857
With insurance, I paid: $216.85
Total cost: $1,333
With insurance, cost to me: $320
