S01Not billable, use a more specific code below

Open wound of head

In Injuries to the head (S00-S09), chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes

270 billable codes under S01: 3 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.

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Instructional notes

Excludes1: not coded here, use a different code

  • open skull fracture (S02.- with 7th character B)

Excludes2: not included here, code separately if applicable

  • injury of eye and orbit (S05.-)
  • traumatic amputation of part of head (S08.-)

Code also: add a code for this too, order depends on the encounter

  • any associated:
  • injury of cranial nerve (S04.-)
  • injury of muscle and tendon of head (S09.1-)
  • intracranial injury (S06.-)
  • wound infection

Also applies, from Injuries to the head (S00-S09)

These notes sit on S00-S09 and apply to every code under it, including S01.

Includes: conditions that are coded here

  • injuries of ear
  • injuries of eye
  • injuries of face [any part]
  • injuries of gum
  • injuries of jaw
  • injuries of oral cavity
  • injuries of palate
  • injuries of periocular area
  • injuries of scalp
  • injuries of temporomandibular joint area
  • injuries of tongue
  • injuries of tooth

Excludes2: not included here, code separately if applicable

  • burns and corrosions (T20-T32)
  • effects of foreign body in ear (T16)
  • effects of foreign body in larynx (T17.3)
  • effects of foreign body in mouth NOS (T18.0)
  • effects of foreign body in nose (T17.0-T17.1)
  • effects of foreign body in pharynx (T17.2)
  • effects of foreign body on external eye (T15.-)
  • frostbite (T33-T34)
  • insect bite or sting, venomous (T63.4)

Code also: add a code for this too, order depends on the encounter

  • for any associated infection

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers 7th character use and coding of injuries, fractures, burns, drug and toxic effects, abuse and neglect, and complications of care (S00-T88).

Read Section I.C.19 (page 77)

All codes under S01

S01 can't be used on a claim. Pick a billable code below; grey headings group them.

Other codes that refer to S01

Notes on these codes point to S01.

  • S00 Excludes1: open wound of head (S01.-)
  • S04 Code Also: open wound of head (S01.-)
  • S06 Code Also: open wound of head (S01.-)
  • S09.1 Code Also: any associated open wound (S01.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Wounds and Injuries

An injury is damage to your body. It is a general term that refers to harm caused by accidents, falls, hits, weapons, and more. In the U.S., millions of people injure themselves every year. These injuries range from minor to life-threatening. Injuries can happen at work or play, indoors or outdoors, driving a car, or walking across the street.

Read more about wounds and injuries on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.