AHA Coding Clinic® for HCPCS - 2020 Quarter 1; Ask the Editor
Repair of encephalocele with mastoid obliteration
Patient with an encephalocele and a cerebrospinal fluid (CSF) leak which caused inflammation of the mastoid mucosa presents for transmastoid repair of the encephalocele with mastoid obliteration. A postauricular incision was made, the ear was undermined and a portion of the fascia was removed for use later. An additional incision was made exposing the mastoid and bone shavings were also taken for later use. Utilizing the operating microscope a mastoidectomy was performed with removal of bone from the mastoid cortex. Next, an 8mm encephalocele was treated via cauterization and was reduced. However, there was a large tegmen mastoideum defect. To ensure the tegmen mastoideum defect was repaired and the CSF leak was sealed, fascia and bone chips were utilized to fill the defect. Also, multilayered closure was performed with gelfoam, fascia, bone pate with fibrin glue placed in sheets to obliterate the mastoid cavity. The skin was closed in layers. Our facility wants to know which CPT code should be assigned for transmastoid repair of encephalocele with mastoid obliteration and bone grafts? Would CPT code 69670 be the appropriate code for the entire procedure or should it be coded to 62121 ? ...
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Article Overview
This premium article reviews a surgical case centered on transmastoid management of an encephalocele with mastoid obliteration and repair of an associated cerebrospinal fluid leak. It is intended for coding and reimbursement professionals who need to understand the procedural scope, the operative setting, and the broader documentation considerations tied to ear, mastoid, and skull base surgery.
Why This Topic Matters
Cases involving mastoid, tegmen, and cerebrospinal fluid leak repair can raise coding questions because multiple operative steps and anatomic sites are involved. This article helps readers understand the scope of the procedure so they can evaluate code selection and documentation needs more accurately.
What You Will Learn
- The overall clinical and surgical context of a transmastoid encephalocele repair
- How mastoid obliteration is incorporated into a skull base/ear procedure
- What kinds of operative documentation elements are present in a complex ear surgery case
- Why this type of case may require careful review by coding and reimbursement staff
Who Should Read This
- Medical coders
- Coding auditors
- Revenue cycle staff
- ENT surgery billers
- Health information management professionals
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