Valid for Submission
Y99.9 is a billable diagnosis code used to specify a medical diagnosis of unspecified external cause status. The code Y99.9 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions. The code is exempt from present on admission (POA) reporting for inpatient admissions to general acute care hospitals.
Unspecified diagnosis codes like Y99.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.
Index of External Cause of Injuries
References found for the code Y99.9 in the External Cause of Injuries Index: