2026 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 2026 (October 1, 2025 through September 30, 2026) 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 other POA exempt codes.
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
- Oral cavity, dental and salivary gland disorder
- Oral cavity, dental and salivary gland injury
- 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 2026, published by CMS and the National Center for Health Statistics.
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:
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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
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, 2025 through September 30, 2026.
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 949, 950, with relative weights from 0.6277 to 1.1897 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.
What is the ICD-9 equivalent of S00.502D?
Under the General Equivalence Mappings, unspecified superficial injury of oral cavity, subsequent encounter converts to ICD-9-CM V58.89 (other specfied aftercare). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
