2027 ICD-10-CM Diagnosis Code S00.502DUnspecified superficial injury of oral cavity, subsequent encounter
S00.502D is a billable ICD-10-CM diagnosis code for unspecified superficial injury of oral cavity, 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 2027 (October 1, 2026 through September 30, 2027) 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 Superficial injury; contusion, subsequent encounter.
Code Identity
Code Classification
Present on Admission (POA)Billing
S00.502D is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Injuries to the head (S00-S09).
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Arrest of growth of root of tooth due to and following dental trauma
- Continued root development of immature permanent tooth following dental trauma
- Dental sequestrum
- Dilaceration of crown of permanent tooth due to and following dental trauma
- Dilaceration of tooth
- Disorder of eruption of permanent tooth due to and following dental trauma
- Duplication of root of permanent tooth due to and following dental trauma
- Friction injury of tooth extending into dentine
- Friction injury of tooth extending into pulp
- Friction injury of tooth limited to enamel
- Gingival disease due to traumatic injury
- Infraocclusion of tooth due to and following dental trauma
- Injury of periodontal tissue
- Injury of teeth
- Internal resorption of tooth
- Internal resorption of tooth following dental trauma
- Intrinsic staining of tooth due to and following dental trauma
- Metaplasia of pulp of tooth following dental trauma
- Occlusal trauma
- Partial arrest of growth of root of tooth due to and following dental trauma
- Resorption of alveolar process due to dental trauma
- Sequestrum of permanent tooth bud due to and following dental trauma
- Submerging tooth
- Superficial injury of gum
- Superficial injury of gum with infection
- Superficial injury of mouth
- Superficial injury of palate
- Superficial injury of tongue
- Supernumerary root of tooth
- Transient internal resorption of tooth due to and following dental trauma
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Superficial injury of head (S00). 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 2027, published by CMS and the National Center for Health Statistics.
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to S00.502D: its own notes plus those printed at S00, block S00-S09, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- 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
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- 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)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code to identify any retained foreign body, if applicable (Z18.-)
Code Also
A second code may be needed to fully describe the condition; the note gives no sequencing direction.
- for any associated infection
Notes
General instructions on how these codes are used.
- 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.
7th Character
Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.
- The appropriate 7th character is to be added to each code from category S00
- Ainitial encounter
- Dsubsequent encounter this code
- Ssequela
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Mouth Disorders
Your mouth is one of the most important parts of your body. It has many different functions. It allows you to:
Read the full article at MedlinePlus
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Convert S00.502D to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S00.502DOverview
What is the ICD-10 code for unspecified superficial injury of oral cavity, subsequent encounter?
The ICD-10-CM code for unspecified superficial injury of oral cavity, subsequent encounter is S00.502D (sometimes written as S00502D). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is S00.502D (Unspecified superficial injury of oral cavity) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified superficial injury of oral cavity, subsequent encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What does the 7th character D in S00.502D mean?
The final character D marks a subsequent encounter: use it for routine care while the unspecified superficial injury of oral cavity is healing, after active treatment has ended.
What MS-DRG does S00.502D group to?
When unspecified superficial injury of oral cavity, subsequent encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 950, 949, with relative weights from 0.7661 to 1.1231 depending on complications. Higher weights mean higher Medicare reimbursement.
Is S00.502D 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 unspecified superficial injury of oral cavity, subsequent encounter on inpatient claims. The code appears in the Injuries to the head (S00-S09) range of the CMS exempt list.
