Question: Texas Subscriber Answer: Ophthalmologists often have to follow up with glaucoma patients because of medications or postsurgical concerns. Many practices differ in their coding method for follow-up visits, using either E/M (99201-99215) or eye codes (92002-92014). Both sets are acceptable as long as they accurately depict the service. The decision usually depends on the physician's preference. However, the ophthalmologist must perform the required elements of the code selected, and he must consider those elements medically necessary for the patient's presenting problem, to bill the appropriate eye code or E/M code level. In documenting follow-up glaucoma visits, be sure always to document a chief complaint even if it is simply "follow-up glaucoma." Hidden trap: Disaster averted: Calling the nursing home before you see the patient to make sure the patient is not at SNF level -- and that you can bill Medicare -- will save you time and money in the future. These patients can be easy to miss if their families do the transporting, however -- you may not be aware that a patient is in an SNF. Note that even though the patient is coming from a nursing home, the place of service is always where she is seen -- in this case, your office. -- Advice for You Be the Coder and Reader Questions provided by Maggie M. Mac, CPC, CEMC, CHC, CMM, ICCE, director, Best Practices-Network Operations at Mount Sinai Hospital in New York City.