2026 ICD-10-CM Diagnosis Code S06.0X9DConcussion with loss of consciousness of unspecified duration, subsequent encounter
S06.0X9D is a billable ICD-10-CM diagnosis code for concussion with loss of consciousness of unspecified duration, 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Traumatic brain injury (TBI); concussion, subsequent encounter.
Code Identity
Code Classification
Present on Admission (POA)Billing
S06.0X9D 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.
- Blast injury to brain
- Brain stem laceration
- Brain stem laceration with concussion
- Cerebellar laceration
- Cerebellar laceration with concussion
- Cerebral cortex laceration with concussion
- Concussion injury of cerebrum
- Concussion with less than 1 hour loss of consciousness
- Concussion with loss of consciousness
- Cortex laceration
- Traumatic brain injury with brief loss of consciousness
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Intracranial injury (S06). 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.
Patient EducationClinical
Concussion
A concussion is a type of brain injury. It involves a short loss of normal brain function. It happens when a hit to the head or body causes your head and brain to move rapidly back and forth. This sudden movement can cause the brain to bounce around or twist in the skull, creating chemical changes in your brain.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S06.0X9D to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S06.0X9DOverview
Is S06.0X9D a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report concussion with loss of consciousness of unspecified duration, subsequent encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character D in S06.0X9D mean?
The final character D marks a subsequent encounter: use it for routine care while the concussion with loss of consciousness of unspecified duration is healing, after active treatment has ended.
What MS-DRG does S06.0X9D group to?
When concussion with loss of consciousness of unspecified duration, 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 S06.0X9D 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 concussion with loss of consciousness of unspecified duration, subsequent encounter on inpatient claims.
What is the ICD-9 equivalent of S06.0X9D?
Under the General Equivalence Mappings, concussion with loss of consciousness of unspecified duration, 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] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
