2026 ICD-10-CM Diagnosis Code S24.149DBrown-Sequard syndrome at unspecified level of thoracic spinal cord, subsequent encounter

ICD-10-CM Codes›S00–T88›S20-S29›S24

ICD-10-CM S24.149D
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S24.149D is a billable ICD-10-CM diagnosis code for Brown-Sequard syndrome at unspecified level of thoracic spinal cord, subsequent encounter. The 7th character D marks it as a subsequent encounter code, used during routine care in the healing or recovery phase. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 949 through 950. The code is exempt from POA reporting. Coders also document this condition as Brown-Séquard syndrome of thoracic spinal cord. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Spinal cord injury (SCI), subsequent encounter.

Code Identity

ICD-10-CM Code
S24.149D
Billable Status
Yes — Valid for Submission
Code Describes
Brown-Sequard syndrome at unspecified level of thoracic spinal cord, subsequent encounter
Short Description
Brown-Sequard synd at unsp level of thor spinal cord, subs
Parent Code
S24.149
Brown-Sequard syndrome at unspecified level of thoracic spinal cord

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS20-S29Injuries to the thorax
CategoryS24Injury of nerves and spinal cord at thorax level
This CodeS24.149DBrown-Sequard syndrome at unspecified level of thoracic spinal cord, subsequent encounter

Present on Admission (POA)Billing

S24.149D is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Brown-Séquard syndrome of thoracic spinal cord

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Injury of nerves and spinal cord at thorax level (S24). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ046
Spinal cord injury (SCI), subsequent encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Spinal Cord Injuries

Your spinal cord is a bundle of nerves that runs down the middle of your back. It carries signals back and forth between your body and your brain. A spinal cord injury disrupts the signals. Spinal cord injuries usually begin with a blow that fractures (breaks) or dislocates your vertebrae, the bone disks that make up your spine.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert S24.149D to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
V58.89 Other specfied aftercare
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About S24.149DOverview

Is S24.149D a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report Brown-Sequard syndrome at unspecified level of thoracic spinal cord, subsequent encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character D in S24.149D mean?

The final character D marks a subsequent encounter: use it for routine care while the Brown-Sequard syndrome at unspecified level of thoracic spinal cord is healing, after active treatment has ended.

What MS-DRG does S24.149D group to?

When Brown-Sequard syndrome at unspecified level of thoracic spinal cord, subsequent encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 949, 950, with relative weights from 0.6277 to 1.1897 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S24.149D exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for Brown-Sequard syndrome at unspecified level of thoracic spinal cord, subsequent encounter on inpatient claims.

What is the ICD-9 equivalent of S24.149D?

Under the General Equivalence Mappings, Brown-Sequard syndrome at unspecified level of thoracic spinal cord, subsequent encounter converts to ICD-9-CM V58.89 (other specfied aftercare). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.