DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

E87 Other disorders of fluid, electrolyte and acid-base balance

  • Header · not billable

E87 is not billable. The category heads 14 billable codes in FY2027, grouped under 9 subdivisions.

Index → code

Where it sits

  1. Chapter 4 Endocrine, nutritional and metabolic diseases (E00-E89)
  2. E70-E88 Metabolic disorders (E70-E88)
  3. E87 Other disorders of fluid, electrolyte and acid-base balance
Billable codes
14
Subdivisions
9
CC / MCC codes
8 / 0
HCC V28 codes
0
New FY2027
0
Index entries
110

Codes in E87

  1. E87.0
    Hyperosmolality and hypernatremia
    BillableCC
    Inclusion terms 2, Excludes2 1

    Inclusion terms

    • Sodium [Na] excess
    • Sodium [Na] overload

    Excludes2

    • diabetes with hyperosmolarity (E08, E09, E11, E13 with final characters .00 or .01) E08 E09 E11 E13
  2. E87.1
    Hypo-osmolality and hyponatremia
    BillableCC
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Sodium [Na] deficiency

    Excludes1

    • syndrome of inappropriate secretion of antidiuretic hormone (E22.2) E22.2
  3. E87.2
    Acidosis
    Header
    Excludes1 1

    Excludes1

    • diabetic acidosis - see categories E08-E10, E11, E13 with ketoacidosis E08 E10 E11 E13
  4. E87.20
    Acidosis, unspecified
    BillableCC
    Inclusion terms 2, Code also 1

    Inclusion terms

    • Lactic acidosis NOS
    • Metabolic acidosis NOS

    Code also

    • , if applicable, respiratory failure with hypercapnia (J96. with 5th character 2) J96
  5. E87.21
    Acute metabolic acidosis
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Acute lactic acidosis
  6. E87.22
    Chronic metabolic acidosis
    BillableCC
    Inclusion terms 1, Code first 1

    Inclusion terms

    • Chronic lactic acidosis

    Code first

    • , if applicable, underlying etiology
  7. E87.29
    Other acidosis
    BillableCC
    Inclusion terms 1, Excludes2 2

    Inclusion terms

    • Respiratory acidosis NOS

    Excludes2

    • acute respiratory acidosis (J96.02) J96.02
    • chronic respiratory acidosis (J96.12) J96.12
  8. E87.3
    Alkalosis
    BillableCC
    Inclusion terms 3

    Inclusion terms

    • Alkalosis NOS
    • Metabolic alkalosis
    • Respiratory alkalosis
  9. E87.4
    Mixed disorder of acid-base balance
    BillableCC
  10. E87.5
    Hyperkalemia
    Billable
    Inclusion terms 2

    Inclusion terms

    • Potassium [K] excess
    • Potassium [K] overload
  11. E87.6
    Hypokalemia
    Billable
    Inclusion terms 1

    Inclusion terms

    • Potassium [K] deficiency
  12. E87.7
    Fluid overload
    Header
    Excludes1 2

    Excludes1

    • edema NOS (R60.9) R60.9
    • fluid retention (R60.9) R60.9
  13. E87.70
    Fluid overload, unspecified
    Billable
  14. E87.71
    Transfusion associated circulatory overload
    Billable
    Inclusion terms 2

    Inclusion terms

    • Fluid overload due to transfusion (blood) (blood components)
    • TACO
  15. E87.79
    Other fluid overload
    Billable
  16. E87.8
    Other disorders of electrolyte and fluid balance, not elsewhere classified
    Billable
    Inclusion terms 3

    Inclusion terms

    • Electrolyte imbalance NOS
    • Hyperchloremia
    • Hypochloremia

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At E87

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

Notes that also apply

Block E70-E88 instructions (Excludes1 5, Excludes2 1): printed on the block page.

Chapter 4 instructions (Notes 1, Excludes1 1): printed on the chapter 4 page.

Index entries

  • Hypernatremia → E87.0
  • Hyperosmolality (see also, Diabetes, by type, with hyperosmolarity) → E87.0
  • Hyponatremia → E87.1
  • Hypo-osmolality → E87.1
  • Acidemia → E87.20
  • Acidosis (lactic) → E87.20
  • Lacticemia, excessive → E87.20
  • Acarbia → E87.29
  • Ketoacidosis → E87.29
  • Acapnia → E87.3
  • Alkalemia → E87.3
  • Alkalosis → E87.3
  • Hyperkalemia → E87.5
  • Hyperpotassemia → E87.5
  • Hypokalemia → E87.6
  • Hypopotassemia → E87.6
  • Hypervolemia → E87.70
  • TACO (transfusion associated circulatory overload) → E87.71
  • Electrolyte imbalance → E87.8
  • Hyperchloremia → E87.8
  • Hyperelectrolytemia → E87.8
  • Hypochloremia → E87.8
  • Edema, edematous (infectious) (pitting) (toxic)salt → E87.0
  • Excess, excessive, excessivelynatrium → E87.0
  • Excess, excessive, excessivelysodium (Na) → E87.0
  • Overloadsodium (Na) → E87.0
  • Syndromehypernatremia → E87.0
  • Syndromehyperosmolarity (see also, Diabetes, by type, with hyperosmolarity) → E87.0
  • Cramp(s)salt-depletion → E87.1
  • Deficiency, deficientnatrium → E87.1
  • Deficiency, deficientsalt → E87.1
  • Deficiency, deficientsodium (Na) → E87.1
  • Depletionsalt or sodium → E87.1
  • Findings, abnormal, inconclusive, without diagnosissodium (deficiency) → E87.1
  • Lowsalt syndrome → E87.1
  • Syndromehyponatremic → E87.1
  • Syndromehyposmolality → E87.1
  • Acidosis (lactic)lactic → E87.20
  • Acidosis (lactic)metabolic NEC → E87.20
  • Acidintoxication → E87.29

70 more, longer entries are not listed; the search box finds them by word.

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