Extended criteria (experimental).
This is the broader ten-condition engine, kept as a secondary area. It shows ICD-10-CM codes and illustrative grouping effects
for CDI staff. The primary surface is Before you sign (kidney, measurement only).
All extended pages.
Hyponatraemia
Rule hyponatremia version 2026.11-1 · condition: Hyponatraemia
Published source
Clinical practice guideline on diagnosis and treatment of hyponatraemia (Spasovski et al., Eur J Endocrinol 2014;170:G1-G47) (2014). Classification by biochemical severity: mild 130-135, moderate 125-129, profound <125 mmol/L. https://www.gpnotebook.com/pages/diabetes-and-endocrinology/hyponatraemia/classification-of-hyponatraemia · public page checked 2026-11-14
Primary guideline text was not loadable; thresholds verified from a secondary page citing it. Acute (<48 h) vs chronic is not encoded.
Inputs
- na_min
- Lowest serum sodium this stay (mmol/L)
- na_low_count
- Number of sodium values below 135
- na_treated
- Fluid restriction, salt tablets, hypertonic saline or a vaptan ordered
Thresholds
- t.low
- 135
- t.moderate
- 130
- t.profound
- 125
- t.repeat
- 2
Derived values
| Name | Expression |
|---|---|
| severity | case(na_min < t.profound, 'profound', na_min < t.moderate, 'moderate', na_min < t.low, 'mild', 'none') |
Outcomes
| Outcome | When | Status | Supports |
|---|---|---|---|
| met Sodium below 135 on {na_low_count} values (lowest {na_min}, {severity}) with treatment ordered | na_min < t.low and na_low_count >= t.repeat and na_treated | supported | E87.1 Hyponatraemia ({severity}) |
| untreated Low sodium without documented treatment or repeat values; clinical significance is a clinician judgement | na_min < t.low | judgement | — |
| not_met All sodium values 135 or above (lowest {na_min}) | na_min >= t.low | not_supported | — |
ICD-10-CM specificity ladder (FY2026 CC/MCC status as a secondary diagnosis)
- E87.1 Hyponatremia (hypo-osmolality and hyponatremia) · CC
Query topic: electrolyte documentation · prompts for an undocumented diagnosis: yes
Where clinical judgement is required
- Reportability needs clinical significance (evaluation, treatment or monitoring); untreated single values are left to the clinician.