R29.0 — Tetany

BillableCC

Is R29.0 billable?

Yes — R29.0 is billable for FY2027. R29.0 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. R29.0 may be submitted for encounters from October 1, 2026 through September 30, 2027.

R29.0 at a glance

Code	R29.0
Description	Tetany
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does R29.0 group to?

R29.0 sits in MDC 10 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

640Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCCmedical
641Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCCmedical

As a secondary diagnosis, R29.0 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.

How is R29.0 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to R29.0. They show the wording a clinician may have documented, which often differs from the Tabular description.

Pseudotetany
Tetany (due to)
Diathesis › spasmophilic
Syndrome › magnesium-deficiency
Tetany › convulsions (due to)
Tetany › hyperkinetic (due to)
Tetany › pseudotetany (due to)

Excludes1 — never code together

The conditions below can never be reported together with R29.0 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

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

Inclusion terms

Alternative wording in documentation that is classified to R29.0.

Carpopedal spasm

Excludes2 — not included here — inherited from Chapter 18

The conditions below are not part of R29.0, but a patient may have both at the same time. When documentation supports it, R29.0 and the excluded code may both be reported.

abnormal findings on antenatal screening of mother (O28.-)
certain conditions originating in the perinatal period (P04-P96)
signs and symptoms classified in the body system chapters
signs and symptoms of breast (N63, N64.5)

How long has R29.0 existed?

R29.0 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which codes are confused with R29.0?

ICD-10-CM declares these codes mutually exclusive with R29.0 — exactly one of each pair can be correct for a given encounter.