2017/18 ICD-10-CM Diagnosis Code K21.9

Gastro-esophageal reflux disease without esophagitis

Applicable To
  • Esophageal reflux NOS
The following code(s) above K21.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to K21.9:
  • K00-K95
    2018 ICD-10-CM Range K00-K95

    Diseases of the digestive system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the digestive system
  • K20-K31
    2018 ICD-10-CM Range K20-K31

    Diseases of esophagus, stomach and duodenum

    Type 2 Excludes
    Diseases of esophagus, stomach and duodenum
  • K21
    ICD-10-CM Diagnosis Code K21

    Gastro-esophageal reflux disease

      2016 2017 2018 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • newborn esophageal reflux (P78.83)
    Gastro-esophageal reflux disease
Approximate Synonyms Clinical Information ICD-10-CM K21.9 is grouped within Diagnostic Related Group(s) (MS-DRG v35.0):

Convert K21.9 to ICD-9-CM

Code History

Diagnosis Index entries containing back-references to K21.9:

ICD-10-CM Codes Adjacent To K21.9
K14.5 Plicated tongue
K14.6 Glossodynia
K14.8 Other diseases of tongue
K14.9 Disease of tongue, unspecified
K20 Esophagitis
K20.0 Eosinophilic esophagitis
K20.8 Other esophagitis
K20.9 Esophagitis, unspecified
K21 Gastro-esophageal reflux disease
K21.0 Gastro-esophageal reflux disease with esophagitis
K21.9 Gastro-esophageal reflux disease without esophagitis
K22 Other diseases of esophagus
K22.0 Achalasia of cardia
K22.1 Ulcer of esophagus
K22.10 …… without bleeding
K22.11 …… with bleeding
K22.2 Esophageal obstruction
K22.3 Perforation of esophagus
K22.4 Dyskinesia of esophagus
K22.5 Diverticulum of esophagus, acquired
K22.6 Gastro-esophageal laceration-hemorrhage syndrome

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.