2026 ICD-10-CM Diagnosis Code S00.512DAbrasion of oral cavity, subsequent encounter
S00.512D is a billable ICD-10-CM diagnosis code for abrasion 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
S00.512D 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.
- Abrasion and/or friction burn of gum with infection
- Abrasion and/or friction burn of gum without infection
- Abrasion and/or friction burn of head and/or neck without infection
- Abrasion of buccal mucosa
- Abrasion of cheek
- Abrasion of floor of mouth
- Abrasion of gum
- Abrasion of hard palate
- Abrasion of mandibular attached gingiva
- Abrasion of mandibular vestibule
- Abrasion of maxillary attached gingiva
- Abrasion of maxillary vestibule
- Abrasion of mouth region
- Abrasion of oral alveolar mucosa
- Abrasion of palate
- Abrasion of soft palate
- Abrasion of tongue
- Infected abrasion of oral mucosa
- Open wound of buccal mucosa
- Open wound of mouth floor
- Open wound of tongue
- Scratch of mouth
- Superficial injury of gum with infection
- Superficial injury of palate
- Superficial injury of tongue
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
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.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S00.512D to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S00.512DOverview
Is S00.512D (Abrasion of oral cavity) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report abrasion of oral cavity, subsequent encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character D in S00.512D mean?
The final character D marks a subsequent encounter: use it for routine care while the abrasion of oral cavity is healing, after active treatment has ended.
What MS-DRG does S00.512D group to?
When abrasion 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 S00.512D 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 abrasion of oral cavity, subsequent encounter on inpatient claims.
What is the ICD-9 equivalent of S00.512D?
Under the General Equivalence Mappings, abrasion 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.
