ICD-10-CM P74.421 is the diagnosis code for Hyperchloremia of newborn. This code falls under the section "Transitory endocrine and metabolic disorders specific to newborn" within Chapter 16 â Certain conditions originating in the perinatal period (P00-P96). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions are not included in P74.421. If the patient has both, code each condition separately:
Understanding where P74.421 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, P74.421 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
P74.421 is the ICD-10-CM diagnosis code for "Hyperchloremia of newborn". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of P74.421 is P74.42 ("Disturbances of chlorine balance of newborn"). P74.421 provides a more specific classification within this category.
P74.421 is located in Section P70-P74 â "Transitory endocrine and metabolic disorders specific to newborn" within Chapter 16 of the ICD-10-CM Tabular List.
Use P74.421 when the patients documented diagnosis matches "Hyperchloremia of newborn" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Hyperchloremia of newborn is P74.421.
Yes, P74.421 can be used as a primary diagnosis code since it is billable and specific.
P74.421 is in Chapter 16 of the ICD-10-CM Tabular List.
Yes, P74.421 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.