2026 ICD-10-CM Diagnosis Code S01.409DUnspecified open wound of unspecified cheek and temporomandibular area, subsequent encounter
S01.409D is a billable ICD-10-CM diagnosis code for unspecified open wound of unspecified cheek and temporomandibular area, 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 Any dental condition including traumatic injury; and Open wounds of head and neck, subsequent encounter.
Code Identity
Code Classification
Present on Admission (POA)Billing
S01.409D 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.
- Avulsion of maxilla
- Fracture of angle of mandible
- Fracture of coronoid process of mandible
- Fracture of subcondylar process of mandible
- Fracture of zygomatic arch
- Glass in cheek
- Glass in face
- Glass in head
- Open dislocation of jaw
- Open division, jaw ligament
- Open division, temporomandibular ligament
- Open fracture of mandible, angle of jaw
- Open fracture of mandible, condylar process
- Open fracture of mandible, coronoid process
- Open fracture of mandible, subcondylar
- Open fracture of ramus of mandible
- Open fracture of zygoma
- Open fracture of zygomatic arch
- Open fracture of zygomatic tripod
- Open subluxation jaw
- Open wound of cheek
- Temporomandibular subluxation
- Traumatic dislocation of temporomandibular joint
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
Facial Injuries and Disorders
Face injuries and disorders can cause pain and affect how you look. In severe cases, they can affect sight, speech, breathing and your ability to swallow. Fractures (broken bones), especially in the bones of your nose, cheekbone and jaw, are common facial injuries.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S01.409D to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S01.409DOverview
Is S01.409D a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified open wound of unspecified cheek and temporomandibular area, subsequent encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character D in S01.409D mean?
The final character D marks a subsequent encounter: use it for routine care while the unspecified open wound of unspecified cheek and temporomandibular area is healing, after active treatment has ended.
What MS-DRG does S01.409D group to?
When unspecified open wound of unspecified cheek and temporomandibular area, 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 S01.409D 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 open wound of unspecified cheek and temporomandibular area, subsequent encounter on inpatient claims.
What is the ICD-9 equivalent of S01.409D?
Under the General Equivalence Mappings, unspecified open wound of unspecified cheek and temporomandibular area, 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.
