E87.1 – Hypo-osmolality and hyponatremia
ICD-10-CM 2027 diagnosis code · Metabolic disorders
ICD-10-CM code
E87.1
- Code
E87.1(claims format:E871)- Description
- Hypo-osmolality and hyponatremia
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 4. Endocrine, nutritional and metabolic diseases (E00-E89)
- Block
- E70-E88 Metabolic disorders
- Parent codes
- E87
Notes for E87.1
Applicable to:
- Sodium [Na] deficiency
Excludes1 (not coded here):
- syndrome of inappropriate secretion of antidiuretic hormone (E22.2)
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
E87 – Other disorders of fluid, electrolyte and acid-base balance
Excludes1 (not coded here):
Block E70-E88
Excludes1 (not coded here):
Excludes2 (not included here):
- Ehlers-Danlos syndromes (Q79.6-)
Index terms for E87.1
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Hyponatremia
- Hypo-osmolality
- Low, salt syndrome
- Syndrome, salt, low
- Syndrome, sick, cell
- Cramp, salt-depletion
- Syndrome, hyponatremic
- Syndrome, hyposmolality
- Depletion, salt or sodium
- Syndrome, salt, depletion
- Deficiency, deficient, salt
- Deficiency, deficient, sodium
- Deficiency, deficient, natrium
- Findings, abnormal, inconclusive, without diagnosis, sodium
Related codes in E87
- E87.0 – Hyperosmolality and hypernatremiaBillable
- E87.2 – AcidosisHeader
- E87.3 – AlkalosisBillable
- E87.4 – Mixed disorder of acid-base balanceBillable
- E87.5 – HyperkalemiaBillable
- E87.6 – HypokalemiaBillable
- E87.7 – Fluid overloadHeader
- E87.8 – Other disorders of electrolyte and fluid balance, not elsewhere classifiedBillable
Frequently asked questions
What is ICD-10 code E87.1?
E87.1 is the ICD-10-CM code for hypo-osmolality and hyponatremia, in the block E70-E88 (Metabolic disorders).
Is E87.1 a billable code?
Yes. E87.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does E87.1 belong to?
It belongs to category E87 – Other disorders of fluid, electrolyte and acid-base balance.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.