Background: Peroral Endoscopic Myotomy (POEM) is a safe treatment for esophageal achalasia with comparable safety to Heller myotomy plus fundoplication (HMF) and pneumatic dilatation (PD). More data comparing POEM to Heller Myotomy plus fundoplication and pneumatic dilation are available since the previous Society of American Gastrointestinal and Endoscopic Surgeons (SAGES) guideline published on this topic in 2021. Objective: This guideline provides an update to the evidence-based guideline from the SAGES guideline on this topic published in 2021. It is intended to support clinicians, surgeons, and patients in decisions about the use of POEM for the treatment of achalasia. Results: The panel agreed on 3 recommendations for adults with achalasia. A conditional recommendation for the use of POEM over PD was issued. Conditional recommendations included the option of using either POEM with appropriate use of proton-pump inhibitors (PPIs) or HM with fundoplication to treat achalasia. POEM was favored over HM with fundoplication for achalasia subtype III. Conclusions: POEM is a safe and effective treatment for achalasia in adults. It demonstrates greater efficacy than PD, however specific situations may warrant PD. POEM has previously been compared to Heller myotomy, but this comparison was not relevant to modern surgical practice. Shifting the paradigm, POEM plus appropriate use of PPIs should be compared to Heller plus fundoplication. This reflection of current practice allows for a conditional recommendation for either approach in the treatment of achalasia subtypes 1 and 2, and for a preference of POEM for subtype 3.