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T15.91XA ICD-10-CM Code: Foreign body on external eye, part unspecified, right eye, initial encounter

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0, Appendix B.

  • MS-DRG 124 — OTHER DISORDERS OF THE EYE WITH MCC OR THROMBOLYTIC AGENT (MDC 02)
  • MS-DRG 125 — OTHER DISORDERS OF THE EYE WITHOUT MCC (MDC 02)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Official Registry Overview & Definition

Foreign body on external eye, part unspecified, right eye, initial encounter is a billable ICD-10-CM diagnosis code (T15.91A).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for T15.91XA in the official ICD-10-CM tabular list.

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code, if known, for foreign body entering into or through a natural orifice (W44.-)

Frequently Compared Codes

The official Excludes notes on T15.91XA name these codes. Each comparison page covers when the two can — or must not — be reported together.

Change history

No changes recorded for this code — unchanged since the FY2016 baseline of the change ledger.

Verify Before Coding

  • No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Contextual Map

Every relationship of T15.91XA in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • S00-T88 — Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) (S00-T88) [Hierarchy]
  • T15-T19 — Effects of foreign body entering through natural orifice [Hierarchy]

Referenced by Excludes1 notes

  • Z18 — Retained foreign body fragments [Excludes1](via T15.-): “foreign body entering through orifice (T15-T19)” · check together

Referenced by Excludes2 notes (11)

  • S00 — Superficial injury of head [Excludes2](via T15.-): “effects of foreign body on external eye (T15.-)” · check together
  • S00-S09 — Injuries to the head (S00-S09) [Excludes2](via T15.-): “effects of foreign body on external eye (T15.-)” · check together
  • S01 — Open wound of head [Excludes2](via T15.-): “effects of foreign body on external eye (T15.-)” · check together
  • S02 — Fracture of skull and facial bones [Excludes2](via T15.-): “effects of foreign body on external eye (T15.-)” · check together
  • S03 — Dislocation and sprain of joints and ligaments of head [Excludes2](via T15.-): “effects of foreign body on external eye (T15.-)” · check together
  • S04 — Injury of cranial nerve [Excludes2](via T15.-): “effects of foreign body on external eye (T15.-)” · check together
  • S05 — Injury of eye and orbit [Excludes2](via T15.-): “effects of foreign body on external eye (T15.-)” · check together
  • S06 — Intracranial injury [Excludes2](via T15.-): “effects of foreign body on external eye (T15.-)” · check together
  • and 3 more

Clinical classification (CCSR)

  • INJ020 — Effect of foreign body entering opening, initial encounter [CCSR]
  • EXT018 — External cause codes: other specified, classifiable and NEC; initial encounter [CCSR]
  • EXT020 — External cause codes: intent of injury, accidental/unintentional [CCSR]

Potential MS-DRG

  • DRG 124 — OTHER DISORDERS OF THE EYE WITH MCC OR THROMBOLYTIC AGENT [MS-DRG]: “OTHER DISORDERS OF THE EYE WITH MCC OR THROMBOLYTIC AGENT (MDC 02)”
  • DRG 125 — OTHER DISORDERS OF THE EYE WITHOUT MCC [MS-DRG]: “OTHER DISORDERS OF THE EYE WITHOUT MCC (MDC 02)”

MDC crossing · procedures (1200)

  • MDC 02 — Diseases and Disorders of the Eye [MDC crossing]: “Diseases and Disorders of the Eye — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”
  • 039S0ZX — Drainage of Right Temporal Artery, Open Approach, Diagnostic [Same-MDC procedure]: “Drainage of Right Temporal Artery, Open Approach, Diagnostic — grouped in MDC 02, the procedure side of this code's crossing.” · check together
  • 039S4ZX — Drainage of Right Temporal Artery, Percutaneous Endoscopic Approach, Diagnostic [Same-MDC procedure]: “Drainage of Right Temporal Artery, Percutaneous Endoscopic Approach, Diagnostic — grouped in MDC 02, the procedure side of this code's crossing.” · check together
  • 039T0ZX — Drainage of Left Temporal Artery, Open Approach, Diagnostic [Same-MDC procedure]: “Drainage of Left Temporal Artery, Open Approach, Diagnostic — grouped in MDC 02, the procedure side of this code's crossing.” · check together
  • 039T4ZX — Drainage of Left Temporal Artery, Percutaneous Endoscopic Approach, Diagnostic [Same-MDC procedure]: “Drainage of Left Temporal Artery, Percutaneous Endoscopic Approach, Diagnostic — grouped in MDC 02, the procedure side of this code's crossing.” · check together
  • 03BS0ZX — Excision of Right Temporal Artery, Open Approach, Diagnostic [Same-MDC procedure]: “Excision of Right Temporal Artery, Open Approach, Diagnostic — grouped in MDC 02, the procedure side of this code's crossing.” · check together
  • and 1195 more

Nearest codes (40)

  • T15 — Foreign body on external eye [Sibling]
  • T15.02XD — Foreign body in cornea, left eye, subsequent encounter [Sibling]
  • T15.02XS — Foreign body in cornea, left eye, sequela [Sibling]
  • T15.1 — Foreign body in conjunctival sac [Sibling]
  • T15.10 — Foreign body in conjunctival sac, unspecified eye [Sibling]
  • T15.10XA — Foreign body in conjunctival sac, unspecified eye, initial encounter [Sibling]
  • T15.10XD — Foreign body in conjunctival sac, unspecified eye, subsequent encounter [Sibling]
  • T15.10XS — Foreign body in conjunctival sac, unspecified eye, sequela [Sibling]
  • and 32 more

Referenced by Other Codes

Clinical classification (AHRQ CCSR):INJ020 — Effect of foreign body entering opening, initial encounter (default); EXT018 — External cause codes: other specified, classifiable and NEC; initial encounter; EXT020 — External cause codes: intent of injury, accidental/unintentional.

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Potential MS-DRG Relationships (FY2026)

Not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity.

Named in the grouper logic of 2 MS-DRGs: DRG 124 (MDC 02), DRG 125 (MDC 02).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Official ICD-10-CM tabular notes on other codes that name T15.91XA or its code family.

1 Excludes1 notes: Z18 (via T15.-).

11 Excludes2 notes: S00 (via T15.-), S00-S09 (via T15.-), S01 (via T15.-), S02 (via T15.-), S03 (via T15.-), S04 (via T15.-), S05 (via T15.-), S06 (via T15.-), S07 (via T15.-), S08 (via T15.-) and 1 more.

Frequently Asked Questions (FAQ) & Clinical Guidance

Does T15.91XA require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category T15.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to T15.91XA in its code family, with their registry titles.

  • T15.90 — Foreign body on external eye, part unspecified, unspecified eye
  • T15.90XA — Foreign body on external eye, part unspecified, unspecified eye, initial encounter
  • T15.90XD — Foreign body on external eye, part unspecified, unspecified eye, subsequent encounter
  • T15.90XS — Foreign body on external eye, part unspecified, unspecified eye, sequela
  • T15.91 — Foreign body on external eye, part unspecified, right eye
  • T15.91XD — Foreign body on external eye, part unspecified, right eye, subsequent encounter
  • T15.91XS — Foreign body on external eye, part unspecified, right eye, sequela
  • T15.92 — Foreign body on external eye, part unspecified, left eye
  • T15.92XA — Foreign body on external eye, part unspecified, left eye, initial encounter
  • T15.92XD — Foreign body on external eye, part unspecified, left eye, subsequent encounter

View all codes in the T15 family