Transitory neonatal disorders of calcium and magnesium metabolism (P71) ICD-10-CM
The P71 code range covers transitory neonatal disorders of calcium and magnesium metabolism with 8 ICD-10-CM diagnosis codes. 7 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the P71 Range 8 codes · 7 billable
- P71 Transitory neonatal disorders of calcium and magnesium metabolismNon-billable
- P71.0 Cow's milk hypocalcemia in newborn
- P71.1 Other neonatal hypocalcemia
- P71.2 Neonatal hypomagnesemia
- P71.3 Neonatal tetany without calcium or magnesium deficiency
- P71.4 Transitory neonatal hypoparathyroidism
- P71.8 Other transitory neonatal disorders of calcium and magnesium metabolism
- P71.9 Transitory neonatal disorder of calcium and magnesium metabolism, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the P71 range.
Hypocalcemia
Reduction of the blood calcium below normal. Manifestations include hyperactive deep tendon reflexes, Chvostek's sign, muscle and abdominal cramps, and carpopedal spasm. (Dorland, 27th ed)
Hypoparathyroidism
A condition caused by a deficiency of PARATHYROID HORMONE (or PTH). It is characterized by HYPOCALCEMIA and hyperphosphatemia. Hypocalcemia leads to TETANY. The acquired form is due to removal or injuries to the PARATHYROID GLANDS. The congenital form is due to mutations of genes, such as TBX1; (see DIGEORGE SYNDROME); CASR encoding CALCIUM-SENSING RECEPTOR; or PTH encoding parathyroid hormone.
Tetany
A disorder characterized by muscle twitches, cramps, and carpopedal spasm, and when severe, laryngospasm and seizures. This condition is associated with unstable depolarization of axonal membranes, primarily in the peripheral nervous system. Tetany usually results from HYPOCALCEMIA or reduced serum levels of MAGNESIUM that may be associated with HYPERVENTILATION; HYPOPARATHYROIDISM; RICKETS; UREMIA; or other conditions. (From Adams et al., Principles of Neurology, 6th ed, p1490)
About the P71 Code Range
ICD-10 code section P71 covers transitory neonatal disorders related to calcium and magnesium metabolism. These codes are used to identify short-term metabolic issues affecting newborns' calcium and magnesium levels, crucial for early diagnosis and treatment.
This section includes specific conditions like P71.0 for cow's milk hypocalcemia, also called neonatal hypocalcemia, which occurs when a newborn experiences low calcium due to milk intake. P71.1 captures other types of neonatal hypocalcemia, including late-onset or phosphate-related causes. For low magnesium conditions, P71.2 addresses neonatal hypomagnesemia, which is linked with various familial syndromes and tetany. P71.3 codes neonatal tetany when calcium and magnesium levels are normal, indicating muscle spasms without deficiency. P71.4 records transient neonatal hypoparathyroidism, a temporary hormone deficiency affecting calcium regulation. Other less common metabolic disorders fall under P71.8, and unspecified cases fit P71.9. Using these codes helps clinicians and coders accurately identify and document neonatal calcium and magnesium metabolic disorders for effective management and billing.
Questions About This Page
How many billable codes are in the P71 range?
Of the 8 codes in this range, 7 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the P71 range classify?
The range classifies transitory neonatal disorders of calcium and magnesium metabolism. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
