Is E87.1 a billable ICD-10-CM code?

Yes. E87.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does E87.1 sit in the tabular list?

Endocrine, nutritional and metabolic diseases (E00-E89), in the block Metabolic disorders (E70-E88).

What cannot be coded together with E87.1?

E87.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

E87.1

E87.1 — Hypo-osmolality and hyponatremia

Billable / specific codeICD-10-CM

E87.1 is a billable, specific ICD-10-CM code for hypo-osmolality and hyponatremia. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

syndrome of inappropriate secretion of antidiuretic hormone (E22.2)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Sodium [Na] deficiency

Risk adjustment

E87.1 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

E87.1 is named in 4 Medicare coverage policies — 4 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A57189Billing and Coding: Serum Magnesium
A57204Billing and Coding: MRI and CT Scans of the Head and Neck
A57326Billing and Coding: Electrocardiograms
A57361Billing and Coding: Monitored Anesthesia Care

How E87.1 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to E87.1.

Hypo-osmolality
Hyponatremia
Cramp›salt-depletion
Deficiency, deficient›natrium
Deficiency, deficient›salt
Deficiency, deficient›sodium(Na)
Depletion›salt or sodium
Findings, abnormal, inconclusive, without diagnosis›sodium(deficiency)
Low›salt syndrome
Syndrome›hyponatremic
Syndrome›hyposmolality
Syndrome›salt›depletion

Related codes at this level

Codes that share E87. If E87.1 is not quite right, the correct code is usually one of these.

Questions about E87.1

Is E87.1 a billable ICD-10-CM code?: Yes. E87.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does E87.1 sit in the tabular list?: Endocrine, nutritional and metabolic diseases (E00-E89), in the block Metabolic disorders (E70-E88).
What cannot be coded together with E87.1?: E87.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.