It was prompted by an antitrust investigation launched by Connecticut's attorney general.
The investigation ended with the Infectious Diseases Society of America agreeing to form a new panel of experts to review the current guidelines.
They heard from doctors on both sides of the debate.
Mainstream doctors believe the infection is short term and should be treated as such, but a handful of doctors and patients say it can be long-lasting and requires long-term antibiotics.
"This is a formidable pathogen and there's still a lot we don't understand, but I think we have to be humble about this disease," Dr. Ken Liegner of the International Lyme Disease Society said.
The panel is expected to make a decision by the end of the year.
They could do nothing or they could revise some of the guidelines or they could choose to re-write them all together.
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