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K55.051 ICD-10-CM Code: Focal (segmental) acute (reversible) ischemia of intestine, part unspecified

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 393 — OTHER DIGESTIVE SYSTEM DIAGNOSES WITH MCC (MDC 06)
  • MS-DRG 394 — OTHER DIGESTIVE SYSTEM DIAGNOSES WITH CC (MDC 06)
  • MS-DRG 395 — OTHER DIGESTIVE SYSTEM DIAGNOSES WITHOUT CC/MCC (MDC 06)
  • MS-DRG 791 — PREMATURITY WITH MAJOR PROBLEMS (MDC 15)
  • MS-DRG 793 — FULL TERM NEONATE WITH MAJOR PROBLEMS (MDC 15)

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

Focal (segmental) acute (reversible) ischemia of intestine, part unspecified is a billable ICD-10-CM diagnosis code (K55.051).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for K55.051 in the official ICD-10-CM tabular list.

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Excludes2 — Not Included Here

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

Frequently Compared Codes

The official Excludes notes on K55.051 name these codes. Each comparison page covers when the two can — or must not — be reported together.

Change history

  • FY2017 — 2016-10-01
    Added to the code set
    Focal (segmental) acute (reversible) ischemia of intestine, part unspecified
    FY2017 changes

Verify Before Coding

  • MCC as a secondary diagnosis (FY2026). Can raise the stay's MS-DRG severity tier.

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 K55.051 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

  • K00-K95 — Chapter 11: Diseases of the Digestive System (K00-K95) (K00-K95) [Hierarchy]
  • K55-K64 — Other diseases of intestines [Hierarchy]

Referenced by Excludes2 notes

  • I74 — Arterial embolism and thrombosis [Excludes2](via K55.0.-): “mesenteric embolism and thrombosis (K55.0-)” · check together
  • I82 — Other venous embolism and thrombosis [Excludes2](via K55.0.-): “mesenteric (K55.0-)” · check together

Clinical classification (CCSR)

  • DIG025 — Other specified and unspecified gastrointestinal disorders [CCSR]
  • CIR026 — Peripheral and visceral vascular disease [CCSR]

Potential MS-DRG

  • MCC — Major Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (MCC).”
  • DRG 393 — OTHER DIGESTIVE SYSTEM DIAGNOSES WITH MCC [MS-DRG]: “OTHER DIGESTIVE SYSTEM DIAGNOSES WITH MCC (MDC 06)”
  • DRG 394 — OTHER DIGESTIVE SYSTEM DIAGNOSES WITH CC [MS-DRG]: “OTHER DIGESTIVE SYSTEM DIAGNOSES WITH CC (MDC 06)”
  • DRG 395 — OTHER DIGESTIVE SYSTEM DIAGNOSES WITHOUT CC/MCC [MS-DRG]: “OTHER DIGESTIVE SYSTEM DIAGNOSES WITHOUT CC/MCC (MDC 06)”
  • DRG 791 — PREMATURITY WITH MAJOR PROBLEMS [MS-DRG]: “PREMATURITY WITH MAJOR PROBLEMS (MDC 15)”
  • DRG 793 — FULL TERM NEONATE WITH MAJOR PROBLEMS [MS-DRG]: “FULL TERM NEONATE WITH MAJOR PROBLEMS (MDC 15)”

MDC crossing · procedures (5744)

  • MDC 06 — Diseases and Disorders of the Digestive System [MDC crossing]: “Diseases and Disorders of the Digestive System — 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.”
  • MDC 15 — Newborns and Other Neonates with Conditions Originating in Perinatal Period [MDC crossing]: “Newborns and Other Neonates with Conditions Originating in Perinatal Period — 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.”
  • 008Q0ZZ — Division of Vagus Nerve, Open Approach [Same-MDC procedure]: “Division of Vagus Nerve, Open Approach — grouped in MDC 06, the procedure side of this code's crossing.” · check together
  • 008Q3ZZ — Division of Vagus Nerve, Percutaneous Approach [Same-MDC procedure]: “Division of Vagus Nerve, Percutaneous Approach — grouped in MDC 06, the procedure side of this code's crossing.” · check together
  • 008Q4ZZ — Division of Vagus Nerve, Percutaneous Endoscopic Approach [Same-MDC procedure]: “Division of Vagus Nerve, Percutaneous Endoscopic Approach — grouped in MDC 06, the procedure side of this code's crossing.” · check together
  • 02BP3ZZ — Excision of Pulmonary Trunk, Percutaneous Approach [Same-MDC procedure]: “Excision of Pulmonary Trunk, Percutaneous Approach — grouped in MDC 06, the procedure side of this code's crossing.” · check together
  • 02BQ3ZZ — Excision of Right Pulmonary Artery, Percutaneous Approach [Same-MDC procedure]: “Excision of Right Pulmonary Artery, Percutaneous Approach — grouped in MDC 06, the procedure side of this code's crossing.” · check together
  • and 5739 more

Index entries

  • Ischemia, ischemic, intestine (large) (small) (transient), acute, focal[Index term]

Nearest codes (36)

  • K55 — Vascular disorders of intestine [Sibling]
  • K55.0 — Acute vascular disorders of intestine [Sibling]
  • K55.01 — Acute (reversible) ischemia of small intestine [Sibling]
  • K55.011 — Focal (segmental) acute (reversible) ischemia of small intestine [Sibling]
  • K55.012 — Diffuse acute (reversible) ischemia of small intestine [Sibling]
  • K55.019 — Acute (reversible) ischemia of small intestine, extent unspecified [Sibling]
  • K55.02 — Acute infarction of small intestine [Sibling]
  • K55.021 — Focal (segmental) acute infarction of small intestine [Sibling]
  • and 28 more

Change history

  • FY2017 — Added to the code set [Change history]

Referenced by Other Codes

Clinical classification (AHRQ CCSR):DIG025 — Other specified and unspecified gastrointestinal disorders (default); CIR026 — Peripheral and visceral vascular disease.

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)

MCC — Major Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 23 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 5 MS-DRGs: DRG 393 (MDC 06), DRG 394 (MDC 06), DRG 395 (MDC 06), DRG 791 (MDC 15), DRG 793 (MDC 15).

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 K55.051 or its code family.

2 Excludes2 notes: I74 (via K55.0.-), I82 (via K55.0.-).

Nearest Codes in This Family

Official ICD-10-CM classifications closest to K55.051 in its code family, with their registry titles.

  • K55.04 — Acute infarction of large intestine
  • K55.041 — Focal (segmental) acute infarction of large intestine
  • K55.042 — Diffuse acute infarction of large intestine
  • K55.049 — Acute infarction of large intestine, extent unspecified
  • K55.05 — Acute (reversible) ischemia of intestine, part unspecified
  • K55.052 — Diffuse acute (reversible) ischemia of intestine, part unspecified
  • K55.059 — Acute (reversible) ischemia of intestine, part and extent unspecified
  • K55.06 — Acute infarction of intestine, part unspecified
  • K55.061 — Focal (segmental) acute infarction of intestine, part unspecified
  • K55.062 — Diffuse acute infarction of intestine, part unspecified

View all codes in the K55 family

Indexed Clinical Terms (1)

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.

  • Ischemia, ischemic, intestine (large) (small) (transient), acute, focal