Depends if you have dot phrases to work with in EPIC which are super helpful, but start with:
Patient age, sex (can insert revelant history here or at end of HPI) (pregnancy with correct abbreviations g3p2, etc) chief complaint (some docs want only one, others are ok if patient has two-ish associated things). Potentially who brought them in if they are young or mentally/physically disabled, or if brought by EMS will indicate here and interventions done en route (less relevant in clinic). Recent medically treatment relevant to symptoms here in one to two sentences (eg. seen in clinic by PCP for *** with labs/imaging done, which were negative/***, diagnosed with ***, started on cipro on DATE and has been compliant with plan of care to point, etc.). If recent surgery or procedure: s/p *** with Dr. *** on ***, no complications until ***. If these things arent relevant and this is the first point of care then just go over the story: Billy fell down the stairs earlier today (if time given include). Secondary to the fall Billy has right foot pain, but has been ambulatory and did not lose consciousness. Billy has had 4x instances of emesis since then. Pain rated /10 or on FACES scale if young, (modification of pain here). Patient (or parent/caregiver) denies ***these symptoms***. Has taken *** at home for ***(pain, nausea,etc), with *** relief of ***. (this is another spot to put relevant medical history here). No other alleviating or aggravating factors.
Depending on doctor some have easy ROS's: 10 systems reviewed no findings unless otherwise stated above, or you might have to put them out, eg. right foot pain, emesis, no loss consciousness.
Really you can write these in your sleep once you get going, and will learn what to include/not include also what is relevant from the records. I've tried to include some things to help here in a really general way, there is alot to learn, and my main recommendation is to look what terminology and phrasing the doctors use and adapt to USE THOSE CORRECTLY. Good luck and have fun.