ICD-10-CM 2027 diagnosis code
R11.15Cyclical vomiting syndrome unrelated to migraine
R11.15 is a valid, billable ICD-10-CM code for cyclical vomiting syndrome unrelated to migraine. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Code last changed in FY2020 (effective October 1, 2019). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About R11.15
R11.15 is the ICD-10-CM diagnosis code for Cyclical vomiting syndrome unrelated to migraine. It belongs to category R11 (nausea and vomiting), block R10-R19 (symptoms and signs involving the digestive system and abdomen) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within R11.1 (vomiting), R11.15 is specifically for Cyclical vomiting syndrome unrelated to migraine. Related codes cover unspecified (R11.10), without nausea (R11.11), Projectile vomiting (R11.12), of fecal matter (R11.13), Bilious vomiting (R11.14) and cannabis hyperemesis syndrome (R11.16).
Don't report R11.15 together with the conditions in its Excludes1 note: cyclical vomiting in migraine (G43.A-).
The conditions in its Excludes2 note aren't part of R11.15, but may be coded alongside it if the patient has both: bulimia nervosa (F50.20) and diabetes mellitus due to underlying condition (E08.-).
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 393 (Other Digestive System Diagnoses with MCC, relative weight 1.5881), DRG 394 (Other Digestive System Diagnoses with CC, relative weight 0.9228) and DRG 395 (Other Digestive System Diagnoses without CC/MCC, relative weight 0.6382), 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.
It was added in FY2020, effective October 1, 2019.
Coding notes
- Cyclic vomiting syndrome NOS
- Persistent vomiting
- cyclical vomiting in migraine (G43.A-)
Notes that apply from higher levels
Instructions written at a parent level also apply to R11.15.
› From R11 Nausea and vomiting
Broader instructions also apply from R10-R19 Symptoms and signs involving the digestive system and abdomen and Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.
Alphabetic index entries
2 entriesTerms in the official ICD-10-CM index that lead to R11.15.
Codes whose notes reference R11.15
- G43.AExcludes1
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 06 · Diseases and Disorders of the Digestive System
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2020 (effective 10/1/2019): Added
- No changes since FY2020.
Common questions about R11.15
Is R11.15 billable?
- Yes. R11.15 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R11.15 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R11.15 as a principal diagnosis.
Is R11.15 a CC or MCC?
- No. R11.15 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does R11.15 group to?
- R11.15 is used in the MS-DRG v44.0 logic for MS-DRG 393 (Other Digestive System Diagnoses with MCC), MS-DRG 394 (Other Digestive System Diagnoses with CC) and MS-DRG 395 (Other Digestive System Diagnoses without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.