2020 ICD-10-CM Diagnosis Code K20.0

Eosinophilic esophagitis

    2016 2017 2018 2019 2020 Billable/Specific Code
  • K20.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM K20.0 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of K20.0 - other international versions of ICD-10 K20.0 may differ.
The following code(s) above K20.0 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 K20.0:
  • K00-K95
    2020 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
    2020 ICD-10-CM Range K20-K31

    Diseases of esophagus, stomach and duodenum

    Type 2 Excludes
    Diseases of esophagus, stomach and duodenum
  • K20
    ICD-10-CM Diagnosis Code K20

    Esophagitis

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • erosion of esophagus (K22.1-)
    • esophagitis with gastro-esophageal reflux disease (K21.0)
    • reflux esophagitis (K21.0)
    • ulcerative esophagitis (K22.1-)
    Type 2 Excludes
    • eosinophilic gastritis or gastroenteritis (K52.81)
    Use Additional
    • code to identify:
    • alcohol abuse and dependence (F10.-)
    Esophagitis
Clinical Information
  • Allergic inflammation of the esophagus. Morphologically, it is characterized by the presence of eosinophils infiltrating the esophageal epithelium. Patients present with swallowing difficulty and heartburn.
  • Chronic esophagitis characterized by esophageal mucosal eosinophilia. It is diagnosed when an increase in eosinophils are present over the entire esophagus. The reflux symptoms fail to respond to proton pump inhibitors treatment, unlike in gastroesophageal reflux disease. The symptoms are associated with ige-mediated hypersensitivity to food or inhalant allergens.
ICD-10-CM K20.0 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 391 Esophagitis, gastroenteritis and miscellaneous digestive disorders with mcc
  • 392 Esophagitis, gastroenteritis and miscellaneous digestive disorders without mcc

Convert K20.0 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
Code annotations containing back-references to K20.0:
  • Type 2 Excludes: K52.2
    , K52.81
    ICD-10-CM Diagnosis Code K52.2

    Allergic and dietetic gastroenteritis and colitis

      2016 2017 - Converted to Parent Code 2018 2019 2020 Non-Billable/Non-Specific Code
    Applicable To
    • Food hypersensitivity gastroenteritis or colitis
    Type 2 Excludes
    • allergic eosinophilic colitis (K52.82)
    • allergic eosinophilic esophagitis (K20.0)
    • allergic eosinophilic gastritis (K52.81)
    • allergic eosinophilic gastroenteritis (K52.81)
    • food protein-induced proctocolitis (K52.82)
    Use Additional
    ICD-10-CM Diagnosis Code K52.81

    Eosinophilic gastritis or gastroenteritis

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Eosinophilic enteritis
    Type 2 Excludes
    • eosinophilic esophagitis (K20.0)

Diagnosis Index entries containing back-references to K20.0:
  • Esophagitis (acute) (alkaline) (chemical) (chronic) (infectional) (necrotic) (peptic) (postoperative) K20.9
    ICD-10-CM Diagnosis Code K20.9

    Esophagitis, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Esophagitis NOS
    • eosinophilic K20.0

ICD-10-CM Codes Adjacent To K20.0
K14.0 Glossitis
K14.1 Geographic tongue
K14.2 Median rhomboid glossitis
K14.3 Hypertrophy of tongue papillae
K14.4 Atrophy of tongue papillae
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

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