What is the ICD-10 code for Gangrene, not elsewhere classified?

The ICD-10-CM code for Gangrene, not elsewhere classified is I96 (fiscal year 2026). It is a billable diagnosis code.

What does ICD-10 code I96 mean?

I96 is the ICD-10-CM diagnosis code for Gangrene, not elsewhere classified. Gangrene, not elsewhere classified

Is I96 a billable ICD-10 code?

Yes, I96 is a billable ICD-10-CM code that can be used on medical claims.

What chapter is I96 in?

I96 is classified under Chapter 9: Diseases of the circulatory system (I00-I99), Section I95-I99: Other and unspecified disorders of the circulatory system (I95-I99).

What are the includes and excludes for I96?

Excludes1 (not coded here): gangrene in atherosclerosis of native arteries of the extremities (I70.26); gangrene in hernia (K40.1, K40.4, K41.1, K41.4, K42.1, K43.1-, K44.1, K45.1, K46.1); gangrene in other peripheral vascular diseases (I73.-). Excludes2 (not included here): gangrene in diabetes mellitus (E08-E13 with .52).

I96 Gangrene, not elsewhere classified

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The ICD-10-CM code for Gangrene, not elsewhere classified is I96 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter: 9: Diseases of the circulatory system (I00-I99)
Section: I95-I99: Other and unspecified disorders of the circulatory system (I95-I99)
Category I96: 1 code (1 billable)
FY2026 Status: Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to I96:

Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer)
Acrosphacelus
Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer) › perineum
Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer) › abdomen (wall)
Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer) › extremity (lower) (upper)
Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer) › limb (lower) (upper)
Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer) › auricle
Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer) › cutaneous, spreading

Excludes1

Not coded here. These conditions should NOT be coded together with I96.

gangrene in atherosclerosis of native arteries of the extremities (I70.26)
gangrene in hernia (K40.1, K40.4, K41.1, K41.4, K42.1, K43.1-, K44.1, K45.1, K46.1)
gangrene in other peripheral vascular diseases (I73.-)
gangrene of certain specified sites - see Alphabetical Index
gas gangrene (A48.0)
pyoderma gangrenosum (L88)

Excludes2

Not included here. These conditions are coded elsewhere but may be coded together if applicable.

gangrene in diabetes mellitus (E08-E13 with .52)

Inclusion Terms

Gangrenous cellulitis

U.S. Hospital Utilization

An estimated 129,460 U.S. inpatient stays in 2023 included I96 among the documented diagnoses.
5,985 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Presumed relationship due to Index term “with”

The classification presumes a causal relationship between hypertension and heart involvement and between hypertension and kidney involvement, as the two conditions are linked by the term “with” in the Alphabetic Index. These conditions should be coded as related even in the absence of provider documentation explicitly linking them, unless the documentation clearly states the conditions are unrelated.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.9.a

Provider must link conditions not specifically indexed as related

For hypertension and conditions not specifically linked by relational terms such as “with,” “associated with” or “due to” in the classification, provider documentation must link the conditions in order to code them as related.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.9.a

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026