I think it might depend on what plan you have. I checked, and they wouldn't cover one for me.
That's what they told me EVERY TIME I CALLED (I seriously called like 10 times b/c I kept getting the run around from them each time). They kept telling me it wasn't covered then the double electric wasn't covered, etc, etc. However, I had my OB do the OB Needs Assessment Form (this is new for regular UPMC insurance as of the past year or so...before, they only wanted it filled out for the UPMC for You insurance holders) which would automatically trigger them calling you to follow up.
The woman who called to follow up told me it's 99.9% of the time covered for women with UPMC insurance going back to work and that most people don't know that and she told me exactly what the script needed to say (even after talking to the Member Services people after knowing this information, they still said it wouldn't be covered). When I had the script, I faxed it in as she said to do. I then called the Member Services, gave them the billing code for the medical reason. Member services verified full coverage and said it would be processed that day. Got the call from the Home Health Company later that afternoon and they said they would get it in the mail to me the next day.
So, yeah, I don't believe a word the Member Services people tell me b/c I was told every time it wasn't covered. Then, when I had a medical reason billing code (for maternal/infant separation due to work), voila, it was fully covered.