E87.1
Billable codeHypo-osmolality and hyponatremia
The ICD-10 code for hypo-osmolality and hyponatremia is E87.1.
Clinical notes
Excludes1 (not coded here)
An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).
- syndrome of inappropriate secretion of antidiuretic hormone (E22.2)
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Sodium [Na] deficiency
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- E87.0Hyperosmolality and hypernatremia
- E87.2Acidosisnon-billable header
- E87.3Alkalosis
- E87.4Mixed disorder of acid-base balance
- E87.5Hyperkalemia
- E87.6Hypokalemia
- E87.7Fluid overloadnon-billable header
- E87.8Other disorders of electrolyte and fluid balance, not elsewhere classified
- E87.1Hypo-osmolality and hyponatremia
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 2761
Associated MS-DRGs
E87.1 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.