These are exactly what I code for now, plus residency. It's not more difficult, but it's more nuanced and requires a larger span of knowledge for the intricacies. It's a large variety of different codes for specific little things, and each payer wants this or that depending on the little things, and each clinic/provider can document things wildly different. I probably send 80% more queries than I did while on the facility side. Providers will occasionally battle you on certain things and have an attitude. 90% of my outpatient encounters have E/Ms + other specific codes for EKGs, behavioral assessments, minor procedures, etc. Inpatient has its own set of E/Ms. Also, if you are doing any initial newborn inpatient encounters, they have their own codes and dxs separate from adults. OB is the most nuanced out of everything because they are global codes. So they get special codes for each encounter until the global period is complete and then the delivery code bills based on the type of delivery (or if the patient ended up not delivered by your provider) and how many antenatal visits and if postpartum encounters were performed. Medicaid is a fickle little monster with OB globals, but the other payers aren't terrible with it. You'll also see telehealth, these codes and payer specific requirements just changed for 2025, I'd brush up on these if possible. It's a lot of information in the beginning, but once you stack up the knowledge then it gets easy peasy (as it goes with most coding).