2026 ICD-10-CM Diagnosis Code T17.1XXAForeign body in nostril, initial encounter

ICD-10-CM Codes›S00–T88›T15-T19›T17

ICD-10-CM T17.1XXA
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T17.1XXA is a billable ICD-10-CM diagnosis code for foreign body in nostril, 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 154 through 156. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Effect of foreign body entering opening, initial encounter; External cause codes: intent of injury, accidental/unintentional; and External cause codes: other specified, classifiable and NEC; initial encounter.

Code Identity

ICD-10-CM Code
T17.1XXA
Billable Status
Yes — Valid for Submission
Code Describes
Foreign body in nostril, initial encounter
Short Description
Foreign body in nostril, initial encounter
Same as the full description in the CMS dataset.
Parent Code
T17.1
Foreign body in nostril

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT15-T19Effects of foreign body entering through natural orifice
CategoryT17Foreign body in respiratory tract
This CodeT17.1XXAForeign body in nostril, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Foreign body in nostril
  • Nasal obstruction
  • Obstruction of airway caused by food
  • Obstruction of airway caused by foreign body
  • Obstruction of respiratory tract caused by bean in nose
  • Obstruction of respiratory tract caused by eraser in nose
  • Obstruction of respiratory tract caused by foreign body in nose
  • Obstruction of respiratory tract caused by marble in nose
  • Obstruction of respiratory tract caused by toy in nose

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 2026, published by CMS and the National Center for Health Statistics.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ020
Effect of foreign body entering opening, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR EXT020
External cause codes: intent of injury, accidental/unintentional
Default principal diagnosis: inpatient No · outpatient No
CCSR EXT018
External cause codes: other specified, classifiable and NEC; initial encounter
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Nasal Obstruction

    any hindrance to the passage of air into and out of the nose. the obstruction may be unilateral or bilateral, and may involve any part of the nasal cavity.

  • Nasal Cavity

    the proximal portion of the respiratory passages on either side of the nasal septum. nasal cavities, extending from the nares to the nasopharynx, are lined with ciliated nasal mucosa.

  • Nasal Obstruction

    blockage of the nasal passages.

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 T17.1XXA to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
932 Foreign body in nose
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.
ICD-9-CM
E915 FB entering oth orifice
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About T17.1XXAOverview

Is T17.1XXA (Foreign body in nostril) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report foreign body in nostril, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character A in T17.1XXA mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for foreign body in nostril, such as an emergency visit or first evaluation.

What MS-DRG does T17.1XXA group to?

When foreign body in nostril, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 154, 155, 156, with relative weights from 0.6911 to 1.5635 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of T17.1XXA?

Under the General Equivalence Mappings, foreign body in nostril, initial encounter converts to ICD-9-CM 932 (foreign body in nose) and E915 (FB entering oth orifice). 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.