E86 Volume depletion

In Spanish

A condition in this category is called Deshidratación in Spanish. The Spanish term names E86.0, dehydration; it is not a translation of every code in the category. The glossary entry gives the term in eight more languages and phrases for an appointment.

Notes on individual codes in E86

These annotations appear under the child codes in the FY2027 ICD-10-CM Tabular List. Codes not listed here carry no annotation of their own.

E86.1 Hypovolemia

Includes: Depletion of volume of plasma

Coding notes for E86

• E86 is a three-character category heading and is not billable on its own. The Official Guidelines state that "a three-character code is to be used only if it is not further subdivided" and that diagnosis codes are reported "at their highest number of characters available". Of the 3 child codes listed above, 3 are billable.
• The category carries a "use additional code" note for any associated disorders of electrolyte and acid-base balance (E87.-).
• Dehydration of newborn (P74.1), postprocedural hypovolemic shock (T81.19) and traumatic hypovolemic shock (T79.4) are Excludes1 for the whole category, so they are not reported together with an E86 code.
• Hypovolemic shock NOS (R57.1) is Excludes2: it is classified elsewhere and may be reported with an E86 code when both are documented.
• The category has three billable codes: E86.0 (dehydration), E86.1 (hypovolemia, which lists depletion of volume of plasma as an inclusion term) and E86.9 (volume depletion, unspecified).

How to read the notes

Includes

Appears under a three-character code title "to further define, or give examples of, the content of the category."

Excludes1

"A type 1 Excludes note is a pure excludes note. It means 'NOT CODED HERE!'" The excluded code "should never be used at the same time as the code above the Excludes1 note."

Excludes2

"A type 2 Excludes note represents 'Not included here.'" The excluded condition is not part of this code, "but a patient may have both conditions at the same time", so both codes may be used together when appropriate.

Code first / Use additional code

Sequencing rules: when a "code first" note is present and an underlying condition is present, "the underlying condition should be sequenced first, if known."

Code also

"Two codes may be required to fully describe a condition, but this note does not provide sequencing direction."

Sources

• ICD-10-CM Files, FY2027 release (effective October 1, 2026) — CDC National Center for Health Statistics
• ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 — CDC/NCHS and CMS (the quoted conventions: Sections I.A.10–13, I.A.17, I.B.2, I.B.7, I.B.13)

Code titles, child codes and annotations are reproduced from the FY2027 ICD-10-CM release. This page is a reference, not coding or medical advice.