S01
ICD-10Non-billable categoryOpen wound of head
Official ICD-10-CM descriptor (FY2026)
Open wound of head
S01 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- open skull fracture (S02.- with 7th character B)
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- injury of eye and orbit (S05.-)
- traumatic amputation of part of head (S08.-)
Code also
Two codes may be needed; sequencing depends on the reason for the encounter.
- any associated:
- injury of cranial nerve (S04.-)
- injury of muscle and tendon of head (S09.1-)
- intracranial injury (S06.-)
- wound infection
7th character
- The appropriate 7th character is to be added to each code from category S01
Permitted 7th characters
| A | initial encounter |
| D | subsequent encounter |
| S | sequela |
More specific codes under S01
- S01.0Open wound of scalpcategory
- S01.1Open wound of eyelid and periocular areacategory
- S01.2Open wound of nosecategory
- S01.3Open wound of earcategory
- S01.4Open wound of cheek and temporomandibular areacategory
- S01.5Open wound of lip and oral cavitycategory
- S01.8Open wound of other parts of headcategory
- S01.9Open wound of unspecified part of headcategory
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.