ICD-10-CM 2027
ICD-10 code for hypocalcemia
From the official ICD-10-CM alphabetic index entry “Hypocalcemia”. Page updated September 29, 2026.
About coding hypocalcemia
The ICD-10-CM code for hypocalcemia is E83.51 (Hypocalcemia). The official index lists 7 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on E83.51.
Within E83.5 (disorders of calcium metabolism), E83.51 is specifically for hypocalcemia. Related codes cover unspecified disorder of calcium metabolism (E83.50), Hypercalcemia (E83.52) and other disorders of calcium metabolism (E83.59).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 640 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC, relative weight 1.3395) and DRG 641 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC, relative weight 0.7865), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific hypocalcemia codes (official index)
- autosomal dominant E20.810 — Autosomal dominant hypocalcemia
- type 1 (ADH1) E20.810 — Autosomal dominant hypocalcemia
- type 2 (ADH2) E20.810 — Autosomal dominant hypocalcemia
- dietary E58 — Dietary calcium deficiency
- neonatal P71.1 — Other neonatal hypocalcemia
- due to cow's milk P71.0 — Cow's milk hypocalcemia in newborn
- phosphate-loading (newborn) P71.1 — Other neonatal hypocalcemia
Common questions about hypocalcemia ICD-10 codes
What is the ICD-10 code for hypocalcemia?
- E83.51 — Hypocalcemia. More specific codes apply when the documentation supports them: E20.810, E20.810, E20.810, E58 and others below.
What is the ICD-10 code for autosomal dominant hypocalcemia?
- E20.810 — Autosomal dominant hypocalcemia.
What is the ICD-10 code for dietary hypocalcemia?
- E58 — Dietary calcium deficiency.
What is the ICD-10 code for neonatal hypocalcemia?
- P71.1 — Other neonatal hypocalcemia.
What is the ICD-10 code for phosphate-loading hypocalcemia?
- P71.1 — Other neonatal hypocalcemia.
Is E83.51 billable?
- Yes. E83.51 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E83.51 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E83.51 as a principal diagnosis.
Is E83.51 a CC or MCC?
- No. E83.51 is neither a CC nor an MCC under MS-DRG v44.0.