K63.821
Non-billableSmall intestinal bacterial overgrowth
Small intestinal bacterial overgrowth
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
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
Child Codes (3)
Related Codes(2)
Also Known As / Clinical Terms(1)
Frequently Asked Questions
What is the ICD-10 code for small intestinal bacterial overgrowth?
The ICD-10-CM code for small intestinal bacterial overgrowth is K63.821. The full clinical description is "Small intestinal bacterial overgrowth". K63.821 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code K63.821 mean?
ICD-10-CM code K63.821 represents “Small intestinal bacterial overgrowth”. It is classified under Chapter 11: Diseases of the Digestive System and is a non-billable header code. Use a more specific child code for billing purposes.
Is K63.821 a billable code?
No, K63.821 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 3 child codes under K63.821.
What chapter is K63.821 in?
K63.821 is in Chapter 11: Diseases of the Digestive System (codes K00-K95).
What are the subcategories under K63.821?
K63.821 has 3 child codes, including: K63.8211 (Small intestinal bacterial overgrowth, hydrogen-subtype), K63.8212 (Small intestnl bact overgrowth, hydrogen sulfide-subtype), K63.8219 (Small intestinal bacterial overgrowth, unspecified).
What are the UMLS CUIs for K63.821?
K63.821 is linked to 1 UMLS Concept Unique Identifier: C3160854. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does K63.821 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like small intestinal bacterial overgrowth 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 K63.821?
There is no direct ICD-11 mapping available for K63.821 in the WHO crosswalk tables. This may mean the concept is classified differently in ICD-11. Use the ICD-10 to ICD-11 converter to search for related codes.
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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.