ICD-10-CM Code E87.21
Acute metabolic acidosis
Diagnosis information
Billable
Yes
Valid for claim submission
Chapter
E00–E89
Endocrine, nutritional and metabolic diseases
Risk adjustment
None
Not risk-adjustable (V28)
More codes in the E87 category
Other billable ICD-10-CM codes in the same category as E87.21. Coding to the highest specificity the documentation supports is what keeps a claim clean — pick the child code that most precisely matches the diagnosis.
- E87.0Hyperosmolality and hypernatremia
- E87.1Hypo-osmolality and hyponatremia
- E87.20Acidosis, unspecified
- E87.22Chronic metabolic acidosis
- E87.29Other acidosis
- E87.3Alkalosis
- E87.4Mixed disorder of acid-base balance
- E87.5Hyperkalemia
- E87.6Hypokalemia
- E87.70Fluid overload, unspecified
- E87.71Transfusion associated circulatory overload
- E87.79Other fluid overload
Documentation & coding notes
- E87.21 is a billable/specific ICD-10-CM code — it can be reported as a primary or secondary diagnosis when the documentation supports it. Code to the highest level of specificity the record allows.
- Always verify the code against the current ICD-10-CM Official Guidelines and the payer's coverage policy before submitting — coverage, medical necessity edits, and sequencing rules vary by payer.
Related E00–E89 codes
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Medical coding disclaimer
ICD-10-CM codes and descriptions shown are from the CMS FY2026 official code set and HCC mappings from the CMS-HCC V28 model (payment year 2026), shown for educational reference. Official Guidelines, payer coverage, medical-necessity edits, and sequencing rules vary. Always verify with the current ICD-10-CM Official Guidelines and the payer before submitting claims. D3rx is not responsible for coding or billing outcomes.