ICD-10-CM code E87.1 is a crucial diagnosis code for medical professionals and coding specialists. It specifically identifies Hypo-osmolality and hyponatremia, conditions related to a critical electrolyte imbalance in the body. This article provides an in-depth look at the E87.1 diagnosis code, its clinical relevance, and essential information for accurate coding and understanding of hyponatremia.
What is ICD-10-CM Code E87.1?
E87.1 is a billable and specific code within the International Classification of Diseases, 10th Revision, Clinical Modification (ICD-10-CM) system. This means it is recognized for reimbursement purposes and precisely pinpoints a particular medical condition. The 2025 edition of ICD-10-CM E87.1 became effective on October 1, 2024, and has remained consistent through several updates, indicating its established place in the diagnostic coding framework. It’s important to note that E87.1 as defined here is the American ICD-10-CM version, and international versions might have variations. The code is directly applicable to conditions characterized by sodium [Na] deficiency.
Hyponatremia Explained
Hyponatremia, often referred to as low sodium level, is the primary condition identified by the diagnosis code E87.1. It is characterized by an abnormally low concentration of sodium in the blood. Sodium is a vital electrolyte that plays a key role in maintaining fluid balance, nerve and muscle function, and blood pressure regulation. When sodium levels become too low, various bodily functions can be compromised.
Hypo-osmolality is closely linked to hyponatremia and refers to a decreased concentration of dissolved particles in the blood (including sodium). These terms are often used synonymously in the context of E87.1. Clinically, hyponatremia signifies a deficiency of sodium in the blood, sometimes referred to as salt depletion. It indicates that the level of sodium in the circulating blood is lower than normal.
Coding Details and Excludes Notes
When using E87.1, it’s crucial to understand the “type 1 excludes” note associated with it. A type 1 excludes note is a pure excludes, meaning “not coded here.” This instruction indicates that a code excluded by a type 1 excludes note should never be used at the same time as E87.1. This is because the two conditions are mutually exclusive, representing situations where they cannot occur concurrently, such as congenital versus acquired forms of the same condition. While the original text doesn’t specify which codes are excluded, it’s a vital coding principle to be aware of when utilizing E87.1.
Furthermore, E87.1 may have annotation back-references. These references point to other ICD-10-CM codes that contain annotations relevant to E87.1. These annotations can include “Applicable To,” “Code Also,” “Code First,” “Excludes1,” “Excludes2,” “Includes,” “Note,” or “Use Additional” instructions. These back-references are essential for coders to ensure comprehensive and accurate diagnostic coding, as they highlight related conditions and coding guidelines that might impact the application of E87.1.
Approximate Synonyms for E87.1 include:
- Hyponatremia
- Hyponatremia (low sodium level)
- Hyposmolality
Understanding diagnosis code E87.1 and its associated condition, hyponatremia, is paramount for healthcare professionals involved in diagnosis, treatment, and medical coding. Accurate use of this code ensures appropriate medical billing and contributes to comprehensive patient data analysis.
