ICD-10-CM 2027
ICD-10 code for neonatal hypocalcemia
From the official ICD-10-CM alphabetic index entry “Hypocalcemia › neonatal”. Page updated September 29, 2026.
About coding neonatal hypocalcemia
The ICD-10-CM code for neonatal hypocalcemia is P71.1 (Other neonatal hypocalcemia). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on P71.1.
Within P71, choose P71.1 (Other neonatal hypocalcemia) only when documentation doesn't support a more specific option: Cow's milk hypocalcemia in newborn (P71.0), neonatal hypomagnesemia (P71.2), neonatal tetany without calcium or magnesium deficiency (P71.3), transitory neonatal hypoparathyroidism (P71.4), other transitory neonatal disorders of calcium and magnesium metabolism (P71.8) and transitory neonatal disorder of calcium and magnesium metabolism, unspecified (P71.9).
Don't report P71.1 together with the conditions in its Excludes1 note: neonatal hypoparathyroidism (P71.4).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
More specific neonatal hypocalcemia codes (official index)
- due to cow's milk P71.0 — Cow's milk hypocalcemia in newborn
Don't confuse with (Excludes1 for P71.1)
- neonatal hypoparathyroidism (P71.4)
Common questions about neonatal hypocalcemia ICD-10 codes
What is the ICD-10 code for neonatal hypocalcemia?
- P71.1 — Other neonatal hypocalcemia. More specific codes apply when the documentation supports them: P71.0.
Is P71.1 billable?
- Yes. P71.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can P71.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict P71.1 as a principal diagnosis.
Is P71.1 a CC or MCC?
- P71.1 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.