Abnormal Labs ICD-10-CM Codes

Abnormal Labs ICD-10-CM Codes

A complete guide to Abnormal Labs ICD-10-CM codes for 2023. Find commonly used codes, billability, clinical info, synonyms, and frequently asked questions.

By Joshua Napilay on Aug 8, 2025.

Fact Checked by Ericka Pingol.

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What ICD-10 codes are used for abnormal labs?

Abnormal labs can span a broad range of conditions. The most frequently used abnormal labs ICD codes include:

  • R83.8 - Other abnormal findings in cerebrospinal fluid
  • R73.09 - Other abnormal glucose
  • R79.1 - Abnormal coagulation profile
  • R74.0 - Nonspecific elevation of levels of transaminase and lactic acid dehydrogenase (LDH)
  • R74.8 - Abnormal levels of other serum enzymes
  • R77.8 - Other specified abnormalities of plasma proteins
  • R78.81 - Abnormal endocrine findings in the blood

Which abnormal labs ICD codes are billable?

All of the aforementioned ICD-10-CM codes are valid and billable, except for R74.0. R74.0 is an unspecified code and is not billable; instead, more specific enzyme elevation codes should be used if available.

Clinical information

Abnormal lab results indicate that one or more clinical tests used in medical examinations have returned results outside the standard range.

  • They can indicate an underlying health condition, such as diabetes, liver disease, or a hormonal imbalance.
  • Sometimes, results might be temporarily outside the normal range due to dehydration, certain medications, or stress.
  • Abnormal results warrant further investigation to determine the cause and appropriate treatment, if necessary.

Synonyms include

  • Anomalous lab results
  • Irregular laboratory findings
  • Unusual lab test results
  • Deviant lab outcomes
  • Atypical laboratory results
  • Other specified abnormal findings of blood chemistry, unspecified
  • Abnormal blood test results
  • Abnormal specific findings indicating disorder
  • Abnormal lab findings indicating disorder of carbohydrate metabolism
  • Abnormal results indicating disorder of amino acid metabolism

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Commonly asked questions

Abnormal lab results mean that one or more tests returned results outside the standard range, which may suggest an underlying medical condition or temporary factors like medication, diet, or stress.

After receiving abnormal lab results, healthcare providers usually conduct further testing or evaluation to understand the cause and, if necessary, start appropriate treatment.

While rare, lab errors can occur. If results are unexpected or inconsistent with the patient's health status, doctors may repeat the tests for confirmation.

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