ICD-10-CM 2027
ICD-10 code for hyperemesis
From the official ICD-10-CM alphabetic index entry “Hyperemesis”. Page updated September 29, 2026.
About coding hyperemesis
The ICD-10-CM code for hyperemesis is R11.10 (Vomiting, unspecified). The official index lists 9 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R11.10.
Within R11.1, choose R11.10 (unspecified) only when documentation doesn't support a more specific option: without nausea (R11.11), Projectile vomiting (R11.12), of fecal matter (R11.13), Bilious vomiting (R11.14), Cyclical vomiting syndrome unrelated to migraine (R11.15) and cannabis hyperemesis syndrome (R11.16).
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 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC, relative weight 1.2392) and DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC, relative weight 0.7645), in MDC 06 (Diseases and Disorders of the Digestive System), 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 hyperemesis codes (official index)
- with nausea R11.2 — Nausea with vomiting, unspecified
- gravidarum (mild) O21.0 — Mild hyperemesis gravidarum
- with
- carbohydrate depletion O21.1 — Hyperemesis gravidarum with metabolic disturbance
- dehydration O21.1 — Hyperemesis gravidarum with metabolic disturbance
- electrolyte imbalance O21.1 — Hyperemesis gravidarum with metabolic disturbance
- metabolic disturbance O21.1 — Hyperemesis gravidarum with metabolic disturbance
- severe (with metabolic disturbance) O21.1 — Hyperemesis gravidarum with metabolic disturbance
- projectile R11.12 — Projectile vomiting
- psychogenic F45.8 — Other somatoform disorders
Common questions about hyperemesis ICD-10 codes
What is the ICD-10 code for hyperemesis?
- R11.10 — Vomiting, unspecified. More specific codes apply when the documentation supports them: R11.2, O21.0, O21.1, O21.1 and others below.
What is the ICD-10 code for gravidarum hyperemesis?
- O21.0 — Mild hyperemesis gravidarum.
What is the ICD-10 code for projectile hyperemesis?
- R11.12 — Projectile vomiting.
What is the ICD-10 code for psychogenic hyperemesis?
- F45.8 — Other somatoform disorders.
Is R11.10 billable?
- Yes. R11.10 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R11.10 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R11.10 as a principal diagnosis.
Is R11.10 a CC or MCC?
- No. R11.10 is neither a CC nor an MCC under MS-DRG v44.0.