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ICD-10-CM 2027

ICD-10 code for tetany

R29.0

Tetany

✓ Billable / specificCC — complication/comorbidity

From the official ICD-10-CM alphabetic index entry “Tetany (due to)”. Page updated September 29, 2026.

About coding tetany

The ICD-10-CM code for tetany is R29.0 (Tetany). The official index lists 19 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R29.0.

Within R29 (other symptoms and signs involving the nervous and musculoskeletal systems), R29.0 is specifically for tetany. Related codes cover Meningismus (R29.1), abnormal reflex (R29.2), abnormal posture (R29.3), Clicking hip (R29.4), transient paralysis (R29.5), repeated falls (R29.6), National Institutes of Health Stroke Scale (NIHSS) score (R29.7), other symptoms and signs involving the nervous and musculoskeletal systems (R29.8) and 1 more.

Don't report R29.0 together with the conditions in its Excludes1 note: hysterical tetany (F44.5), neonatal tetany (P71.3), parathyroid tetany (E20.9) and post-thyroidectomy tetany (E89.2).

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 tetany codes (official index)

  • alkalosis E87.3 — Alkalosis
  • associated with rickets E55.0 — Rickets, active
  • convulsions R29.0 — Tetany
  • hysterical F44.5 — Conversion disorder with seizures or convulsions
  • functional (hysterical) F44.5 — Conversion disorder with seizures or convulsions
  • hyperkinetic R29.0 — Tetany
  • hysterical F44.5 — Conversion disorder with seizures or convulsions
  • hyperpnea R06.4 — Hyperventilation
  • hysterical F44.5 — Conversion disorder with seizures or convulsions
  • psychogenic F45.8 — Other somatoform disorders
  • hyperventilation R06.4 — Hyperventilation
  • hysterical F44.5 — Conversion disorder with seizures or convulsions
  • neonatal (without calcium or magnesium deficiency) P71.3 — Neonatal tetany without calcium or magnesium deficiency
  • parathyroid (gland) E20.9 — Hypoparathyroidism, unspecified
  • parathyroprival E89.2 — Postprocedural hypoparathyroidism
  • post- (para)thyroidectomy E89.2 — Postprocedural hypoparathyroidism
  • postoperative E89.2 — Postprocedural hypoparathyroidism
  • pseudotetany R29.0 — Tetany
  • psychogenic (conversion reaction) F44.5 — Conversion disorder with seizures or convulsions

Don't confuse with (Excludes1 for R29.0)

  • hysterical tetany (F44.5)
  • neonatal tetany (P71.3)
  • parathyroid tetany (E20.9)
  • post-thyroidectomy tetany (E89.2)

Common questions about tetany ICD-10 codes

What is the ICD-10 code for tetany?

R29.0 — Tetany. More specific codes apply when the documentation supports them: E87.3, E55.0, R29.0, F44.5 and others below.

What is the ICD-10 code for alkalosis tetany?

E87.3 — Alkalosis.

What is the ICD-10 code for associated with rickets tetany?

E55.0 — Rickets, active.

What is the ICD-10 code for convulsions tetany?

R29.0 — Tetany.

What is the ICD-10 code for functional tetany?

F44.5 — Conversion disorder with seizures or convulsions.

What is the ICD-10 code for hyperkinetic tetany?

R29.0 — Tetany.

What is the ICD-10 code for hyperpnea tetany?

R06.4 — Hyperventilation.

Is R29.0 billable?

Yes. R29.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can R29.0 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict R29.0 as a principal diagnosis.

Is R29.0 a CC or MCC?

R29.0 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.