AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2026 Issue 2; Ask the Editor
Hyperlactatemia
A patient admitted with acute lower gastrointestinal (GI) bleed was found to have acute diffuse ischemic colitis of the large intestine. The patient was also noted to have an elevated lactate level that was monitored throughout the admission. The provider documented hyperlactatemia secondary to ischemic colitis as the final diagnosis. When referencing “Lactate, elevated” in the ICD-10-CM Alphabetic Index, there is an instruction to “see Acidosis, lactic.” This instruction leads to code E87.20, Acidosis, unspecified. Is it appropriate to assign code E87.20 when the documentation does not support a diagnosis of acidosis? What is the appropriate ICD-10-CM code assignment for hyperlactatemia? ...
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Article Overview
This premium coding article discusses how to approach documentation of elevated lactate and hyperlactatemia when it appears alongside acute gastrointestinal and ischemic conditions. It is intended for coding professionals who need help interpreting whether the record supports a related acid-base diagnosis and how to handle the ICD-10-CM indexing trail at a high level.
Why This Topic Matters
Elevated lactate is a common documentation issue in inpatient and acute-care records, and the correct code assignment depends on the provider’s documented diagnosis rather than lab findings alone. The article helps coders recognize when additional provider clarification may be needed and understand the general ICD-10-CM context for this topic.
What You Will Learn
- How hyperlactatemia is discussed in relation to inpatient documentation
- Why elevated lactate findings may require provider clarification
- How the ICD-10-CM index trail is relevant to this topic at a general level
- What kind of coding question is raised when acidosis is not clearly documented
Who Should Read This
- Medical coders
- Coding auditors
- Clinical documentation integrity specialists
- Inpatient coding professionals
Codes Discussed
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