2026 ICD-10-CM Diagnosis Code T15.91XAForeign body on external eye, part unspecified, right eye, initial encounter

ICD-10-CM Codes›S00–T88›T15-T19›T15

ICD-10-CM T15.91XA
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T15.91XA is a billable ICD-10-CM diagnosis code for foreign body on external eye, part unspecified, right eye, 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 124 through 125. Coders also document this condition as foreign body of right eye region. 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
T15.91XA
Billable Status
Yes — Valid for Submission
Code Describes
Foreign body on external eye, part unspecified, right eye, initial encounter
Short Description
Foreign body on external eye, part unsp, right eye, init
Parent Code
T15.91
Foreign body on external eye, part unspecified, right eye

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT15-T19Effects of foreign body entering through natural orifice
CategoryT15Foreign body on external eye
This CodeT15.91XAForeign body on external eye, part unspecified, right eye, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Foreign body of right eye region
  • Foreign body on right external eye

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Foreign body on external eye (T15). 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

Patient EducationClinical

Eye Injuries

The structure of your face helps protect your eyes from injury. Still, injuries can damage your eye, sometimes severely enough that you could lose your vision. Most eye injuries are preventable. If you play sports or work in certain jobs, you may need protection.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert T15.91XA to ICD-9-CMHistory

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

ICD-9-CM
930.9 Foreign bdy ext eye NOS
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
E914 FB entering eye
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 T15.91XAOverview

Is T15.91XA (Foreign body on external eye, part unspecified, right eye) a billable code?

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

What does the 7th character A in T15.91XA mean?

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

What MS-DRG does T15.91XA group to?

When foreign body on external eye, part unspecified, right eye, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of T15.91XA?

Under the General Equivalence Mappings, foreign body on external eye, part unspecified, right eye, initial encounter converts to ICD-9-CM 930.9 (foreign bdy ext eye NOS) and E914 (FB entering eye). 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.