S01.109A Unspecified open wound of unspecified eyelid and periocular area, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S01.109 with 7th character A (initial encounter).

Applies from S01 Open wound of head

Excludes1 (never code together)

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

Excludes2 (not included here)

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

Code also

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

7th character note

• The appropriate 7th character is to be added to each code from category S01

7th character required

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

Applies from S01.1 Open wound of eyelid and periocular area

Applicable to

• Open wound of eyelid and periocular area with or without involvement of lacrimal passages

Medicare Code Edits (MCE v43.1 (April 2026))

• Unspecified code (laterality): Unspecified codes for which a more specific code identifying laterality (right, left, bilateral) exists within the same code family.

Code annotations containing back-references to S01.109A

Back-references to S01.1

• Type 2 Excludes: S05 Injury of eye and orbit ("open wound of eyelid and periocular area (S01.1-)")
• Type 2 Excludes: T15 Foreign body on external eye ("open wound of eyelid and periocular area (S01.1-)")

Back-references to S01

• Code Also: G96.00 Cerebrospinal fluid leak, unspecified ("head injury (S00-S09)")
• Code Also: G96.08 Other cranial cerebrospinal fluid leak ("head injury (S00 - S09)")
• Code Also: G96.09 Other spinal cerebrospinal fluid leak ("head injury (S00 - S09)")
• Type 1 Excludes: S00 Superficial injury of head ("open wound of head (S01.-)")
• Code Also: S04 Injury of cranial nerve ("open wound of head (S01.-)")
• Code Also: S06 Intracranial injury ("open wound of head (S01.-)")
• Code Also: S09.1 Injury of muscle and tendon of head ("any associated open wound (S01.-)")

Nearby codes

• S01.102 Unspecified open wound of left eyelid and periocular area
• S01.102A Unspecified open wound of left eyelid and periocular area, initial encounter
• S01.102D Unspecified open wound of left eyelid and periocular area, subsequent encounter
• S01.102S Unspecified open wound of left eyelid and periocular area, sequela
• S01.109 Unspecified open wound of unspecified eyelid and periocular area
• S01.109A Unspecified open wound of unspecified eyelid and periocular area, initial encounter (this code)
• S01.109D Unspecified open wound of unspecified eyelid and periocular area, subsequent encounter
• S01.109S Unspecified open wound of unspecified eyelid and periocular area, sequela
• S01.11 Laceration without foreign body of eyelid and periocular area
• S01.111 Laceration without foreign body of right eyelid and periocular area
• S01.111A Laceration without foreign body of right eyelid and periocular area, initial encounter