P74.21 is the authoritative medical code for Hypernatremia of newborn. This classification is used in medical billing and clinical recording to specify the clinical criteria for hypernatremia of newborn (ICD-10-CM P74.21), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Hypernatremia of newborn is a billable ICD-10-CM diagnosis code P74.21. Includes: transitory endocrine and metabolic disturbances caused by the infant's response to maternal endocrine and metabolic factors, or its adjustment to extrauterine environment.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for P74.21 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- transitory endocrine and metabolic disturbances caused by the infant's response to maternal endocrine and metabolic factors, or its adjustment to extrauterine environment
Codes in This Family (18)
Official ICD-10-CM classifications in the same code family as P74.21, with their registry titles.
- P74 — Other transitory neonatal electrolyte and metabolic disturbances
- P74.0 — Late metabolic acidosis of newborn
- P74.1 — Dehydration of newborn
- P74.2 — Disturbances of sodium balance of newborn
- P74.22 — Hyponatremia of newborn
- P74.3 — Disturbances of potassium balance of newborn
- P74.31 — Hyperkalemia of newborn
- P74.32 — Hypokalemia of newborn
- P74.4 — Other transitory electrolyte disturbances of newborn
- P74.41 — Alkalosis of newborn
- P74.42 — Disturbances of chlorine balance of newborn
- P74.421 — Hyperchloremia of newborn
- P74.422 — Hypochloremia of newborn
- P74.49 — Other transitory electrolyte disturbance of newborn
- P74.5 — Transitory tyrosinemia of newborn
- P74.6 — Transitory hyperammonemia of newborn
- P74.8 — Other transitory metabolic disturbances of newborn
- P74.9 — Transitory metabolic disturbance of newborn, unspecified
Indexed Clinical Terms (4)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Disturbance (s), electrolyte, newborn, transitory, sodium balance, hypernatremia
- Disturbance (s), sodium balance, newborn, hypernatremia
- Imbalance, electrolyte, neonatal, transitory NEC, sodium, hypernatremia
- Newborn (infant) (liveborn) (singleton), hypernatremia
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: