2026 ICD-10-CM Diagnosis Code S05.91XAUnspecified injury of right eye and orbit, initial encounter

ICD-10-CM Codes›S00–T88›S00-S09›S05

ICD-10-CM S05.91XA
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S05.91XA is a billable ICD-10-CM diagnosis code for unspecified injury of right eye and orbit, 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, 963 through 965. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other unspecified injury.

Code Identity

ICD-10-CM Code
S05.91XA
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified injury of right eye and orbit, initial encounter
Short Description
Unspecified injury of right eye and orbit, initial encounter
Same as the full description in the CMS dataset.
Parent Code
S05.91
Unspecified injury of right eye and orbit

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS00-S09Injuries to the head
CategoryS05Injury of eye and orbit
This CodeS05.91XAUnspecified injury of right eye and orbit, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral ocular hypertension due to ocular trauma
  • Bilateral ocular trauma
  • Bilateral open angle glaucoma due to and following ocular trauma of eyes
  • Bilateral retained intraocular magnetic foreign body due to and following eye trauma
  • Bilateral retained intraocular nonmagnetic foreign body due to and following eye trauma
  • Bilateral traumatic glaucoma
  • Glaucoma of left eye due to and following ocular trauma
  • Glaucoma of right eye due to and following ocular trauma
  • Hematoma of right eye region
  • Hematoma of right orbit
  • Hemorrhage of right orbit
  • Ocular hypertension of left eye due to ocular trauma
  • Ocular hypertension of right eye due to ocular trauma
  • Open angle glaucoma due to and following ocular trauma
  • Open angle glaucoma of left eye due to and following ocular trauma
  • Open angle glaucoma of right eye due to and following ocular trauma
  • Retained foreign body in bilateral eyes
  • Retained magnetic foreign body in left eye
  • Retained magnetic foreign body in right eye
  • Retained nonmagnetic foreign body in left eye
  • Retained nonmagnetic foreign body in right eye
  • Secondary ocular hypertension due to ocular trauma
  • Traumatic hematoma of orbit
  • Traumatic hematoma of right orbit
  • Traumatic injury of globe of right eye
  • Traumatic orbital hemorrhage

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Injury of eye and orbit (S05). 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 INJ027
Other unspecified injury
Default principal diagnosis: inpatient Yes · outpatient Yes

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 S05.91XA to ICD-9-CMHistory

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

ICD-9-CM
871.9 Opn wound of eyeball NOS
Approximate The match is approximate rather than exact.

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 S05.91XAOverview

Is S05.91XA (Unspecified injury of right eye and orbit) a billable code?

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

What does the 7th character A in S05.91XA mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for unspecified injury of right eye and orbit, such as an emergency visit or first evaluation.

What MS-DRG does S05.91XA group to?

When unspecified injury of right eye and orbit, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 124, 125, 963, 964, 965, with relative weights from 0.7678 to 2.7338 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of S05.91XA?

Under the General Equivalence Mappings, unspecified injury of right eye and orbit, initial encounter converts to ICD-9-CM 871.9 (opn wound of eyeball NOS). 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.