Richard Simmons: Lots of Medical Info During 911 Call

The 911 Richard Simmons emergency was rooted in some medical problem ... which is clear from the heavily redacted emergency call.

TMZ has obtained the 911 call from June 3rd, and it's apparent whatever the emergency, it's covered by patient privacy.

Simmons' people say he was just dehydrated, but that's a little curious because it doesn't seem that information would be redacted.

TMZ broke the story ... Simmons was incoherent when paramedics arrived. He spent 3 days in the hospital before being released.