P71.3Neonatal tetany without calcium or magnesium deficiency

P71.3 is the ICD-10-CM diagnosis code for neonatal tetany without calcium or magnesium deficiency. It belongs to category P71 (transitory neonatal disorders of calcium and magnesium metabolism), block P70-P74 (transitory endocrine and metabolic disorders specific to newborn) and chapter 16 (certain conditions originating in the perinatal period). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within P71, choose P71.3 (Neonatal tetany without calcium or magnesium deficiency) only when documentation doesn't support a more specific option: Cow's milk hypocalcemia in newborn (P71.0), other neonatal hypocalcemia (P71.1), neonatal hypomagnesemia (P71.2), 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).

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.

In MS-DRG v44.0, it is part of the grouping logic for DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 775.4 (hypocalcemia and hypomagnesemia of newborn).