Satisfactory cervical smear but lacking transformation zone

This code indicates a Pap test result where the cervical smear is adequate for interpretation, but the transformation zone (TZ) component, which is crucial for detecting precancerous changes, is absent or insufficient. This finding suggests that the most critical area for screening was not fully sampled, potentially limiting the reliability of the negative result.

Use this code when the pathology report for a cervical cytology specimen explicitly states "satisfactory for evaluation but lacking transformation zone" or similar phrasing. This typically occurs when the endocervical cells, which represent the TZ, are not present in the sample. Documentation must clearly indicate the adequacy of the smear for general interpretation, alongside the specific absence of the TZ.

• Do not use this code if the smear is deemed "unsatisfactory" overall; a different code would apply for inadequate samples.
• This code is often followed by a recommendation for repeat screening due to the incomplete sampling.
• Ensure the documentation differentiates between a lack of endocervical/transformation zone component and other reasons for an unsatisfactory smear.