S01.55

Open bite of lip and oral cavity

Header / non-billable

Choose the additional character

S01.55 needs more characters to be billable. Pick the specific code below.

This code does not map to a risk-adjusting HCC in the loaded models.

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

Inherited from S01.5Open wound of lip and oral cavity
Excludes 2

tooth dislocation (S03.2) tooth fracture (S02.5)

Inherited from S01Open wound of head
Excludes 1

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

Excludes 2

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

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

Valid 7th characters and their meanings
CharacterMeaning
Ainitial encounter
Dsubsequent encounter
Ssequela
Inherited from S00-S09Injuries to the head
Includes

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

Excludes 2

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

for any associated infection

Inherited from chapter 19Injury, poisoning and certain other consequences of external causes
Excludes 2

birth trauma (P10-P15) obstetric trauma (O70-O71)

Use additional

code to identify any retained foreign body, if applicable (Z18.-)

Note

Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes. (T07-T88) Injury, poisoning and certain other consequences of external causes (T07-T88) (T20-T32) Burns and corrosions (T20-T32) Includes: burns (thermal) from electrical heating appliances burns (thermal) from electricity burns (thermal) from flame burns (thermal) from friction burns (thermal) from hot air and hot gases burns (thermal) from hot objects burns (thermal) from lightning burns (thermal) from radiation chemical burn [corrosion] (external) (internal) scalds Excludes2: erythema [dermatitis] ab igne (L59.0) radiation-related disorders of the skin and subcutaneous tissue (L55-L59) sunburn (L55.-)

Official Guidelines for S01.55

FY 2026 ›
I.C.19Chapter-specific guidanceChapter 19: Injury, poisoning, and certain other consequences of external causes (S00-T88)

Subsections

Sections that reference S01.55

Sections whose FY 2026 text names S01.55, its S01 category, or a range containing it — the chapter guidance above is the authoritative source.