2026 ICD-10-CM Diagnosis Code S01.522ALaceration with foreign body of oral cavity, initial encounter
S01.522A is a billable ICD-10-CM diagnosis code for laceration with foreign body of oral cavity, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 11 through 13, 157 through 159, 963 through 965. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Any dental condition including traumatic injury; and Open wounds of head and neck, initial encounter.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Complex laceration of mandibular attached gingiva
- Complex laceration of maxillary attached gingiva
- Contaminated complex laceration of mandibular attached gingiva
- Contaminated complex laceration of maxillary attached gingiva
- Contaminated simple laceration of mandibular attached gingiva
- Contaminated simple laceration of maxillary attached gingiva
- Laceration of gingivae
- Simple laceration of mandibular attached gingiva
- Simple laceration of maxillary attached gingiva
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Open wound of head (S01). 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
Foreign Bodies
If you've ever gotten a splinter or had sand in your eye, you've had experience with a foreign body. A foreign body is something that is stuck inside you but isn't supposed to be there. You may inhale or swallow a foreign body, or you may get one from an injury to almost any part of your body.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S01.522A to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S01.522AOverview
What is the ICD-10 code for laceration with foreign body of oral cavity, initial encounter?
The ICD-10-CM code for laceration with foreign body of oral cavity, initial encounter is S01.522A (sometimes written as S01522A). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is S01.522A (Laceration with foreign body of oral cavity) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report laceration with foreign body of oral cavity, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in S01.522A mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for laceration with foreign body of oral cavity, such as an emergency visit or first evaluation.
What MS-DRG does S01.522A group to?
When laceration with foreign body of oral cavity, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 11, 12, 13, 157, 158, 159, 963, 964, 965, with relative weights from 0.7085 to 5.4541 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of S01.522A?
Under the General Equivalence Mappings, laceration with foreign body of oral cavity, initial encounter converts to ICD-9-CM 873.70 (open wnd mouth NOS-compl). The mapping is approximate, so confirm the match fits the documentation.
