Non-Billable / Non-Specific Code
ICD-10-CM K59 is the diagnosis code for Other functional intestinal disorders. This code falls under the section "Other diseases of intestines" within Chapter 11 â Diseases of the digestive system (K00-K95). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as K59. They are mutually exclusive:
The following conditions are not included in K59. If the patient has both, code each condition separately:
Understanding where K59 sits in the ICD-10-CM classification helps ensure proper coding:
No, K59 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
K59 is the ICD-10-CM diagnosis code for "Other functional intestinal disorders". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
K59 is located in Section K55-K64 â "Other diseases of intestines" within Chapter 11 of the ICD-10-CM Tabular List.
K59 has 7 sub-code(s) that provide more specific detail: K59.0, K59.1, K59.2, K59.3, K59.4 and more.
Use K59 when the patients documented diagnosis matches "Other functional intestinal disorders" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Other functional intestinal disorders is K59.
No, K59 is non-billable. Use a more specific sub-code for primary diagnosis billing.
K59 is in Chapter 11 of the ICD-10-CM Tabular List.
Type 1 Excludes for K59 include: change in bowel habit NOS (R19.4); intestinal malabsorption (K90.-); psychogenic intestinal disorders (F45.8).
Yes, K59 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.