ICD-10-CM 2027
ICD-10 code for Dehydration
Confirmed by the official ICD-10-CM index entry “cachexia › dehydration”. Page updated September 29, 2026.
About coding Dehydration
The ICD-10-CM code for Dehydration is E86.0 (Dehydration). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on E86.0.
Within E86 (volume depletion), E86.0 is specifically for Dehydration. Related codes cover Hypovolemia (E86.1) and unspecified (E86.9).
Use an additional code(s) for any associated disorders of electrolyte and acid-base balance (E87.-).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Related Dehydration codes
Common questions about Dehydration ICD-10 codes
What is the ICD-10 code for Dehydration?
- E86.0 — Dehydration. More specific codes apply when the documentation supports them: E86.1, E86.9.
What is the ICD-10 code for hypovolemia?
- E86.1 — Hypovolemia.
What is the ICD-10 code for volume depletion, unspecified?
- E86.9 — Volume depletion, unspecified.
Is E86.0 billable?
- Yes. E86.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E86.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E86.0 as a principal diagnosis.
Is E86.0 a CC or MCC?
- No. E86.0 is neither a CC nor an MCC under MS-DRG v44.0.