Activity Instructions: 19 Saved Help Save & Exit Submit eBook References Using the coding techniques you have learned, carefully read through the case study and determine the most accurate CPT and/or HCPCS procedure code(s) along with any modifier(s), if appropriate. Please list modifiers with the code they relate to as necessary. Include a hyphen in between the code and the modifier. Example Procedure: 43846-74. Be sure to list the codes, one code per box, in the correct order, from top to bottom, and in the proper column. You may not need all of the spaces provided. Case Study: Aaron is a 3-year-old with documented "failure to thrive. Although he appears to eat well, he has chronic diarrhea and is not gaining weight as expected. Upper and lower Gls (esophagogastroduodenoscopy and colonoscopy) are performed. The provider is concerned the patient may have cellacs disease and will order food allergy testing. Procedure code(s) Applicable modifier(s) HCPCS Level code(s) Applicable modifier(s)