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E87.1

Hypo-osmolality and hyponatremia

Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 13 never code together
E87code
Excludes1
  • diabetes insipidus (E23.2)E23.2
  • electrolyte imbalance associated with hyperemesis gravidarum (O21.1)O21.1
  • electrolyte imbalance following ectopic or molar pregnancy (O08.5)O08.5
  • familial periodic paralysis (G72.3)G72.3
  • metabolic acidemia in newborn, unspecified (P19.9)P19.9
E87.1code
Excludes1
  • syndrome of inappropriate secretion of antidiuretic hormone (E22.2)E22.2E22.2
E70-E88block
Excludes1
  • androgen insensitivity syndrome (E34.5-)E34.5-
  • congenital adrenal hyperplasia (E25.0)E25.0
  • hemolytic anemias attributable to enzyme disorders (D55.-)D55.-
  • Marfan syndrome (Q87.4-)Q87.4-
  • 5-alpha-reductase deficiency (E29.1)E29.1
Excludes2
  • Ehlers-Danlos syndromes (Q79.6-)Q79.6-
E00-E89chapter
Excludes1
  • transitory endocrine and metabolic disorders specific to newborn (P70-P74)P70-P74

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 2
E87.1code
Inclusion terms
  • Sodium [Na] deficiency
E00-E89chapter
Notes
  • All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.E05.8E07.0E16-E31E34.-
Index entries leading here 8
  • Syndrome — see also Disease
  • Cramp (s) R25.2
  • Deficiency, deficient
  • Depletion
  • Findings, abnormal, inconclusive, without diagnosis — see also Abnormal
    • sodium (deficiency) E87.1
  • Hyponatremia E87.1
  • Hypo-osmolality E87.1
  • Low
Alongside this code 8 same parent — E87
E87.0 Hyperosmolality and hypernatremia E87.2 Acidosis category E87.3 Alkalosis E87.4 Mixed disorder of acid-base balance E87.5 Hyperkalemia E87.6 Hypokalemia E87.7 Fluid overload category E87.8 Oth disorders of electrolyte and fluid balance, NEC
Additional references
AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable
yes
Code set
FY2026
Parent
E87
Block
E70-E88
Siblings
8

Present FY2024–FY2027.