2027 ICD-10-CM Diagnosis Code S27.9XXDInjury of unspecified intrathoracic organ, subsequent encounter
S27.9XXD is a billable ICD-10-CM diagnosis code for injury of unspecified intrathoracic organ, 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. Coders also document this condition as injury of intrathoracic organ. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Internal organ injury, subsequent encounter.
Code Identity
Code Classification
Present on Admission (POA)Billing
S27.9XXD is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Injuries to the thorax (S20-S29).
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Injury of intrathoracic organ
- Injury of lower respiratory tract
- Injury of thoracic cavity
- Injury of thoracic viscus with open wound into thoracic cavity
- Internal injury of chest
- Multiple injuries of intrathoracic organs
- Multiple injuries of thorax
- Multiple intrathoracic organ injury with open wound into cavity
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Injury of other and unspecified intrathoracic organs (S27). 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 S27.9XXD: its own notes plus those printed at S27, block S20-S29, 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 breast
- injuries of chest (wall)
- injuries of interscapular area
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 bronchus (T17.5)
- effects of foreign body in esophagus (T18.1)
- effects of foreign body in lung (T17.8)
- effects of foreign body in trachea (T17.4)
- frostbite (T33-T34)
- injuries of axilla
- injuries of clavicle
- injuries of scapular region
- injuries of shoulder
- 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.
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 S27
- Ainitial encounter
- Dsubsequent encounter this code
- Ssequela
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name S27.9XXD, its category, or a range that includes it.
Code Also 2
These codes say S27.9XXD may also be needed to fully describe the condition. The note gives no sequencing direction.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Chest Injuries and Disorders
The chest is the part of your body between your neck and your abdomen (belly). The medical term for your chest is thorax.
The full article covers:
- What is the chest?
- What are chest injuries and disorders?
- How are chest injuries and disorders diagnosed?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S27.9XXD to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S27.9XXDOverview
What is the ICD-10 code for injury of unspecified intrathoracic organ, subsequent encounter?
The ICD-10-CM code for injury of unspecified intrathoracic organ, subsequent encounter is S27.9XXD (sometimes written as S279XXD). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is S27.9XXD (Injury of unspecified intrathoracic organ) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report injury of unspecified intrathoracic organ, subsequent encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What does the 7th character D in S27.9XXD mean?
The final character D marks a subsequent encounter: use it for routine care while the injury of unspecified intrathoracic organ is healing, after active treatment has ended.
What MS-DRG does S27.9XXD group to?
When injury of unspecified intrathoracic organ, 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 S27.9XXD 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 injury of unspecified intrathoracic organ, subsequent encounter on inpatient claims. The code appears in the Injuries to the thorax (S20-S29) range of the CMS exempt list.
