A “shift” for midline shift: Brain compression coding with FY 2027 updates

FY 2027 ICD-10-CM index and tabular updates will affect how brain compression is coded. Let’s review the new additions to the index and tabular as well as clinical concepts and coding guidelines for reporting.
 

Understanding changes

New inclusion terms are being added under the main term “shift” in the ICD-10-CM index for FY 2027 to identify “shift midline brain”, “shift midline brain-traumatic”, and “shift midline brain-traumatic with herniation”.

In Chapter 6 of “ICD-10-CM Tabular: Diseases of the nervous system,” new inclusion term “midline shift of brain” was added under the code G93.5, Compression of brain

In Chapter 19 of “ICD-10-CM Tabular: Injury, poisoning, and certain other consequences of external causes,” new inclusion term “traumatic midline shift of brain” was added under code subcategory  S06.A, Traumatic brain compression and herniation

Why it matters

Prior to this change, according to the advice from AHA Coding Clinic for ICD-9-CM, Third Quarter 2011 Page: 11 coders could not assume “that midline shift is synonymous with brain compression.” A query was required to clarify whether the midline shift represented brain compression.

With the ICD-10-CM index and tabular FY 2027 update "midline shift of brain" is reported with the same codes as brain compression.
 

Coding considerations

As with any other condition, code assignment for midline shift of brain/brain compression should be directed by the provider documentation and the reportable conditions underlined in the ICD-10-CM Official Guidelines for Coding and Reporting. Health Information Management (HIM) coding professionals and clinical documentation specialists should refer to both index and the tabular for directions and instructional notes.

For example, ICD-10-CM Alphabetical Index/Tabular List directs professionals to subcategory S06.A, Traumatic brain compression and herniation if the condition is associated with trauma. Traumatic midline shift and compression of brain are excluded from reporting with code G93.5, Compression of brain. “Code first note” in the Tabular List indicates that the code for the underlying traumatic brain injury should be coded first with code for traumatic compression reported as additional diagnosis code. In addition, the final code assignment for traumatic midline shift of brain/brain compression depends on the presence of brain herniation.

It is the provider’s responsibility to document the diagnosis of midline shift or brain compression as well as indicate whether it is due to trauma or due to other cause (such as intracranial hemorrhage). The midline shift must also meet requirements of being a “clinically significant condition that affect patient care in terms of requiring: clinical evaluation; or therapeutic treatment; or diagnostic procedures; or extended length of hospital stay; or increased nursing care and/or monitoring” (ICD-10-CM Official Guidelines for Coding and Reporting Section III. Reporting Additional Diagnoses)

If “midline shift of brain” appears only in an imaging result, it cannot be reported.  The physician/provider must include unique documentation of the condition and establish its clinical significance. 

“If the findings are outside the normal range and the provider has ordered other tests to evaluate the condition or prescribed treatment, it is appropriate to ask the provider whether the abnormal finding should be added.” (ICD-10-CM Official Guidelines for Coding and Reporting Section III.B)
 

Clinical significance understood

What could indicate/provide support for the clinical significance of a midline shift?  

• Additional monitoring (e.g., serial imaging, intracranial pressure monitor placement, intracranial pressure monitoring)
• Clinical signs of compression (headache with nausea or vomiting, declining level of consciousness, decreased GCS score, new or worsening neurologic deficits, abnormal posturing, new seizures, unequal or “blown” pupils, Cushing triad [bradycardia, hypertension, irregular respirations])
• Administration of medications to decrease swelling (mannitol, dexamethasone, 3% normal saline, barbiturate coma, rescue hyperventilation for impending herniation, etc.)
• Surgical decompression (evacuation of blood/tumor, insertion of drainage device, removal of skull bone (skull flap) while swelling/pressure is at peak, etc.)
• Decision to deescalate care/withdrawal of care/transition to hospice/palliative care due to the large amount of shift/compression

If it is not obvious that the midline shift is significant after reviewing for clinical indicators, a validation query would be recommended. However, providing a choice of “clinically significant” is not recommended. We recommend including a choice such as

• Midline shift impacting care, monitoring, treatment decisions etc. (customize the response)
• Midline shift not impactful
• Other
• Unable to determine

As the “shift” in the alphabetical index and tabular list decreases the volume of queries due to semantics/word selection, we can rejoice! But ensure that shift is reportable and the underlying cause is well-documented. Happy fiscal year eve!

Cheryl Manchenton is a manager of inpatient consulting services at Solventum.

Regina Shelkova is a consultant, compliance/audit services at Solventum.