2027 ICD-10-CM Diagnosis Code T17.400SUnspecified foreign body in trachea causing asphyxiation, sequela
T17.400S is a billable ICD-10-CM diagnosis code for unspecified foreign body in trachea causing asphyxiation, sequela. The 7th character S marks it as a sequela code, which reports a problem that remains after the original condition has resolved. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 913 through 914. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.
Code Identity
Code Classification
Present on Admission (POA)Billing
T17.400S is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Effects of foreign body entering through natural orifice (T15-T19).
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Foreign body in respiratory tract (T17). 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 T17.400S: its own notes plus those printed at T17, block T15-T19, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.
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.
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code, if known, for foreign body entering into or through a natural orifice (W44.-)
- code to identify any retained foreign body, if applicable (Z18.-)
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 T17
- Ainitial encounter
- Dsubsequent encounter
- Ssequela this code
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name T17.400S, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming T17.400S: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 4
These codes carry an Excludes2 note naming T17.400S: its condition is not part of those codes, and both may be reported when the patient has both.
- Block S10-S19 Injuries to the neckeffects of foreign body in trachea (T17.4) names T17.4, which includes this code
- Block S20-S29 Injuries to the thoraxeffects of foreign body in trachea (T17.4) names T17.4, which includes this code
- T18.1 Foreign body in esophagusforeign body in respiratory tract (T17.-) names T17.-, which includes this code
- Z03.82 Encounter for observation for suspected foreign body ruled outforeign body in respiratory tract (T17) names T17, which includes this code
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Choking
Food or small objects can cause choking if they get caught in your throat and block your airway. This keeps oxygen from getting to your lungs and brain. If your brain goes without oxygen for more than four minutes, you could have brain damage or die.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert T17.400S to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T17.400SOverview
What is the ICD-10 code for unspecified foreign body in trachea causing asphyxiation, sequela?
The ICD-10-CM code for unspecified foreign body in trachea causing asphyxiation, sequela is T17.400S (sometimes written as T17400S). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is T17.400S (Unspecified foreign body in trachea causing asphyxiation) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified foreign body in trachea causing asphyxiation, sequela on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What does the 7th character S in T17.400S mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the unspecified foreign body in trachea causing asphyxiation itself has resolved, not the original event.
What MS-DRG does T17.400S group to?
When unspecified foreign body in trachea causing asphyxiation, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 914, 913, with relative weights from 0.9281 to 1.5448 depending on complications. Higher weights mean higher Medicare reimbursement.
Is T17.400S 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 foreign body in trachea causing asphyxiation, sequela on inpatient claims. The code appears in the Effects of foreign body entering through natural orifice (T15-T19) range of the CMS exempt list.
