K21.9
BillableGastro-esophageal reflux disease without esophagitis
Gastro-esophageal reflux disease without esophagitis
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Esophageal reflux NOS
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •hiatus herniaK44
Related Codes(1)
Related Conditions
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
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Also Known As / Clinical Terms(263)
SNOMED CT
- Gastroesophageal hernia3662000
- Gastrooesophageal hernia3662000
- Paraesophageal hernia3662000
- Paraesophageal hiatus hernia3662000
- Paraoesophageal hernia3662000
- Paraoesophageal hiatus hernia3662000
- Rolling hiatus hernia3662000
- Thoracic stomach3662000
- DGR - Duodenogastric reflux9733003
- Duodenogastric reflux9733003
- Cardio-esophageal relaxation70257007
- Cardiochalasia70257007
- Chalasia of cardia70257007
- Chalasia of lower esophageal sphincter70257007
- Chalasia of lower oesophageal sphincter70257007
- Hypotensive lower esophageal sphincter70257007
- Hypotensive lower oesophageal sphincter70257007
- Neuhauser-Berenberg syndrome70257007
- Relaxation of lower esophageal sphincter70257007
- Relaxation of lower oesophageal sphincter70257007
- Gastric contents in esophagus225587003
- Gastric contents in oesophagus225587003
- Gastric reflux225587003
- GERD - Gastro-esophageal reflux disease235595009
- GOR - Gastro-esophageal reflux235595009
- GOR - Gastro-oesophageal reflux235595009
- GORD - Gastro-esophageal reflux disease235595009
- GORD - Gastro-oesophageal reflux disease235595009
- Gastro-esophageal reflux235595009
- Gastro-esophageal reflux disease235595009
- Gastro-oesophageal reflux235595009
- Gastro-oesophageal reflux disease235595009
- Gastroesophageal reflux disease235595009
- Gastrooesophageal reflux disease235595009
- Esophageal reflux249496004
- Esophageal reflux finding249496004
- Esophageal reflux observation249496004
- Oesophageal reflux249496004
- Oesophageal reflux finding249496004
- Oesophageal reflux observation249496004
- Gastro-esophageal reflux disease without esophagitis266435005
- Gastro-esophageal reflux disease without oesophagitis266435005
- Gastro-oesophageal reflux disease without oesophagitis266435005
- Gastroesophageal reflux disease without esophagitis266435005
- Finding of esophageal function300288001
- Finding of oesophageal function300288001
- Observation of esophageal function300288001
- Observation of oesophageal function300288001
- Excessive gastric reflux300290000
- Moderate gastric reflux300291001
- Minimal gastric reflux300292008
- Gastro-oesophageal reflux disease with apnoea371101003
- Gastroesophageal reflux disease with apnea371101003
- Gastro-oesophageal reflux disease with hiatal hernia371132002
- Gastroesophageal reflux disease with hiatal hernia371132002
- Hiatal hernia with gastro-oesophageal reflux371132002
- Hiatal hernia with gastro-oesophageal reflux disease371132002
- Hiatal hernia with gastroesophageal reflux371132002
- Hiatal hernia with gastroesophageal reflux disease371132002
- Laryngopharyngeal reflux414581006
- Laryngitis due to gastro-oesophageal reflux427780002
- Laryngitis due to gastroesophageal reflux427780002
- Acid reflux698065002
- Digestive system reflux709493000
- Non-erosive gastro-esophageal reflux disease717846004
- Non-erosive gastro-oesophageal reflux disease717846004
- Erosive gastro-esophageal reflux disease717847008
- Erosive gastro-oesophageal reflux disease717847008
- STAG1-related intellectual disability, facial dysmorphism, gastroesophageal reflux syndrome1187041000
- STAG1-related intellectual disability, facial dysmorphism, gastrooesophageal reflux syndrome1187041000
- Stromal antigen 1-related intellectual disability, facial dysmorphism, gastroesophageal reflux syndrome1187041000
- Stromal antigen 1-related intellectual disability, facial dysmorphism, gastrooesophageal reflux syndrome1187041000
- Secondary hernia of abdomen1197668003
- Diaphragmatic hernia with gastroesophageal reflux disease15926471000119109
- Gastroesophageal reflux disease co-occurrent and due to diaphragmatic hernia15926471000119109
- Gastroesophageal reflux disease co-occurrent and due to paraesophageal hernia15926411000119101
- Gastrooesophageal reflux disease co-occurrent and due to paraoesophageal hernia15926411000119101
- Paraesophageal hernia with gastroesophageal reflux15926411000119101
- Paraoesophageal hernia with gastro-oesophageal reflux15926411000119101
- Gastroesophageal reflux disease in pregnancy15643101000119103
- Gastroesophageal reflux in child10999201000119106
- Gastrooesophageal reflux in child10999201000119106
UMLS
- Acid RefluxC0017168
- Acid Reflux, GastricC0017168
- Acid reflux diseaseC0017168
- Esophageal RefluxC0017168
- Esophageal reflux NOSC0017168
- GASTROESOPHAGEAL REFLUXC0017168
- GASTROESOPHAGEAL REFLUX DISC0017168
- GASTROESOPHAGEAL REFLUX DISEASEC0017168
- GERC0017168
- GERDC0017168
- GERD - Gastro-esophageal reflux diseaseC0017168
- GOR - Gastro-esophageal refluxC0017168
- GOR - Gastro-oesophageal refluxC0017168
- GORDC0017168
- GORD - Gastro-esophageal reflux diseaseC0017168
- GORD - Gastro-oesophageal reflux diseaseC0017168
- Gastric Acid RefluxC0017168
- Gastric Acid Reflux DiseaseC0017168
- Gastro Esophageal RefluxC0017168
- Gastro Esophageal Reflux DiseaseC0017168
- Gastro oesophageal RefluxC0017168
- Gastro-Esophageal RefluxC0017168
- Gastro-Esophageal Reflux DiseaseC0017168
- Gastro-Esophageal Reflux DiseasesC0017168
- Gastro-esophageal refluxC0017168
- Gastro-esophageal reflux diseaseC0017168
- Gastro-oesophageal RefluxC0017168
- Gastro-oesophageal refluxC0017168
- Gastro-oesophageal reflux diseaseC0017168
- Gastroesophageal RefluxC0017168
- Gastroesophageal Reflux DiseaseC0017168
- Gastroesophageal reflux diseaseC0017168
- Gastroesophageal reflux disease (disorder)C0017168
- Gastrooesophageal reflux diseaseC0017168
- HeartburnC0017168
- Reflux Disease, Gastro-EsophagealC0017168
- Reflux, Gastric AcidC0017168
- Reflux, Gastro-EsophagealC0017168
- Reflux, Gastro-oesophagealC0017168
- Reflux, GastroesophagealC0017168
- acid refluxC0017168
- disease gastro-esophageal refluxC0017168
- diseases esophageal refluxC0017168
- esophageal refluxC0017168
- esophageal reflux diseaseC0017168
- gastresophageal reflux diseaseC0017168
- gastro esophageal refluxC0017168
- gastro oesophageal refluxC0017168
- gastro-esophageal refluxC0017168
- gastro-esophageal reflux diseaseC0017168
- gastro-oesophageal refluxC0017168
- gastroesophageal refluxC0017168
- gastroesophageal reflux diseaseC0017168
- gastroesophageal reflux disease (GERD)C0017168
- gastrooesophageal refluxC0017168
- gastrooesophageal reflux diseaseC0017168
- ge refluxC0017168
- gerdC0017168
- oesophageal refluxC0017168
- reflux acidC0017168
- reflux disease esophagealC0017168
- reflux esophagealC0017168
- reflux gastroesophagealC0017168
- Gastro-esophageal reflux disease without esophagitisC0341102
- Gastro-esophageal reflux disease without oesophagitisC0341102
- Gastro-oesophageal reflux disease without oesophagitisC0341102
- Gastroesophageal reflux disease without esophagitisC0341102
- Gastroesophageal reflux disease without esophagitis (disorder)C0341102
Clinical Terms
- Gastric Acid Reflux Disease
- Esophageal reflux
- Observation of esophageal function
- Gastroesophageal reflux disease without esophagitis (disorder)
- Paraesophageal hernia with gastroesophageal reflux
- Reflux, Gastro-Esophageal
- reflux esophageal
- Gastro-oesophageal reflux disease
- Paraesophageal hernia
- Gastroesophageal reflux disease with hiatal hernia
- Finding of oesophageal function
- Reflux Disease, Gastro-Esophageal
- Excessive gastric reflux
- Gastroesophageal hernia
- reflux gastroesophageal
- Gastric Acid Reflux
- Oesophageal reflux observation
- GERD
- GORD
- Paraoesophageal hernia with gastro-oesophageal reflux
- GER
- gastro esophageal reflux
- acid reflux
- Hypotensive lower esophageal sphincter
- GORD - Gastro-oesophageal reflux disease
- Gastric contents in oesophagus
- gastroesophageal reflux disease (GERD)
- Reflux, Gastro-oesophageal
- Hiatal hernia with gastro-oesophageal reflux
- Hypotensive lower oesophageal sphincter
- Moderate gastric reflux
- Gastroesophageal reflux in child
- Gastric contents in esophagus
- ge reflux
- oesophageal reflux
- Gastroesophageal reflux disease in pregnancy
- Paraoesophageal hiatus hernia
- Non-erosive gastro-esophageal reflux disease
- Non-erosive gastro-oesophageal reflux disease
- GASTROESOPHAGEAL REFLUX DIS
- Paraoesophageal hernia
- Gastro-Esophageal Reflux
- Stromal antigen 1-related intellectual disability, facial dysmorphism, gastrooesophageal reflux syndrome
- Gastro-oesophageal reflux disease without oesophagitis
- disease gastro-esophageal reflux
- Observation of oesophageal function
- Gastroesophageal Reflux Disease
- Gastro oesophageal Reflux
- gastresophageal reflux disease
- Gastrooesophageal reflux in child
- Reflux, Gastroesophageal
- reflux disease esophageal
- GERD - Gastro-esophageal reflux disease
- Cardio-esophageal relaxation
- gastroesophageal reflux
- STAG1-related intellectual disability, facial dysmorphism, gastrooesophageal reflux syndrome
- Gastro-esophageal reflux disease without oesophagitis
- Gastro Esophageal Reflux Disease
- Gastroesophageal reflux disease co-occurrent and due to diaphragmatic hernia
- Gastro-oesophageal reflux disease with apnoea
- GORD - Gastro-esophageal reflux disease
- Digestive system reflux
- Relaxation of lower esophageal sphincter
- Stromal antigen 1-related intellectual disability, facial dysmorphism, gastroesophageal reflux syndrome
- Gastro-Esophageal Reflux Diseases
- GOR - Gastro-esophageal reflux
- Gastro-oesophageal Reflux
- Cardiochalasia
- Esophageal reflux finding
- esophageal reflux disease
- reflux acid
- Erosive gastro-oesophageal reflux disease
- Esophageal reflux NOS
- gastrooesophageal reflux disease
- Oesophageal reflux finding
- STAG1-related intellectual disability, facial dysmorphism, gastroesophageal reflux syndrome
- Acid reflux disease
- Hiatal hernia with gastroesophageal reflux disease
- Rolling hiatus hernia
- Thoracic stomach
- DGR - Duodenogastric reflux
- Minimal gastric reflux
- Laryngitis due to gastro-oesophageal reflux
- Finding of esophageal function
- Acid Reflux, Gastric
- Gastrooesophageal reflux disease co-occurrent and due to paraoesophageal hernia
- Hiatal hernia with gastroesophageal reflux
- Laryngitis due to gastroesophageal reflux
- GOR - Gastro-oesophageal reflux
- Chalasia of lower oesophageal sphincter
- Secondary hernia of abdomen
- Duodenogastric reflux
- diseases esophageal reflux
- Neuhauser-Berenberg syndrome
- Hiatal hernia with gastro-oesophageal reflux disease
- Heartburn
- Chalasia of cardia
- Diaphragmatic hernia with gastroesophageal reflux disease
- Gastroesophageal reflux disease co-occurrent and due to paraesophageal hernia
- Esophageal reflux observation
- Chalasia of lower esophageal sphincter
- Reflux, Gastric Acid
- Paraesophageal hiatus hernia
- Relaxation of lower oesophageal sphincter
- Gastro-oesophageal reflux disease with hiatal hernia
- gastrooesophageal reflux
- Gastrooesophageal hernia
- Erosive gastro-esophageal reflux disease
- Laryngopharyngeal reflux
- Gastroesophageal reflux disease without esophagitis
- Gastroesophageal reflux disease (disorder)
- Gastric reflux
- Gastroesophageal reflux disease with apnea
Frequently Asked Questions
What is the ICD-10 code for gastro-esophageal reflux disease without esophagitis?
The ICD-10-CM code for gastro-esophageal reflux disease without esophagitis is K21.9. The full clinical description is "Gastro-esophageal reflux disease without esophagitis". K21.9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code K21.9 mean?
ICD-10-CM code K21.9 represents “Gastro-esophageal reflux disease without esophagitis”. It is classified under Chapter 11: Diseases of the Digestive System and is a billable/specific code that can be used on a claim.
Is K21.9 a billable code?
Yes, K21.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is K21.9 in?
K21.9 is in Chapter 11: Diseases of the Digestive System (codes K00-K95).
What codes cannot be used with K21.9?
K21.9 has Excludes1 notes indicating codes that cannot be used together with it, including: newborn esophageal reflux (P78.83).
What SNOMED CT codes does K21.9 map to?
K21.9 maps to 25 SNOMED CT concepts: 698065002, 70257007, 9733003, 15926471000119109, 709493000, and 20 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for K21.9?
K21.9 is linked to 2 UMLS Concept Unique Identifiers: C0017168, C0341102. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does K21.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like gastro-esophageal reflux disease without esophagitis affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of K21.9?
K21.9 maps to the ICD-11 code: DA22.Z (Gastro-oesophageal reflux disease, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.