00940ZZDrainage of Intracranial Subdural Space, Open Approach

00940ZZ is the ICD-10-PCS code for a drainage procedure on the subdural space, intracranial using an open approach. In ICD-10-PCS, drainage means taking or letting out fluids and/or gases from a body part.

In plain terms, this corresponds to incision of cerebral meninges, the ICD-9-CM procedure title it maps to (01.31).

For a different body part, codes include 00900ZZ (brain), 00910ZZ (cerebral meninges), 00920ZZ (dura mater), 00930ZZ (epidural space, intracranial), 00950ZZ (subarachnoid space, intracranial), 00960ZZ (cerebral ventricle) and 24 more.

The same procedure with a different approach is coded 00943ZZ (percutaneous) and 00944ZZ (percutaneous endoscopic).

With a different device, use 009400Z (drainage device).

It is an operating-room procedure in the MS-DRG logic for DRG 023 (Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator), DRG 024 (Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC), DRG 025 (Craniotomy and Endovascular Intracranial Procedures with MCC), DRG 026 (Craniotomy and Endovascular Intracranial Procedures with CC), DRG 027 (Craniotomy and Endovascular Intracranial Procedures without CC/MCC) and DRG 820 (Lymphoma and Leukemia with Major O.R. Procedures with MCC), under the surgical categories “Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis”, “Craniotomy and endovascular intracranial procedures”, “Lymphoma and Leukemia with Major O.R. Procedures” and 3 more.

It has been valid since ICD-10-PCS took effect on October 1, 2015.