K59.89 — Other specified functional intestinal disorders
Is K59.89 billable?
Yes, but K59.89 is an unspecified code. K59.89 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, K59.89 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting K59.89 — the more specific alternatives are listed below.
More specific alternatives
K59.89 at a glance
| Code | K59.89 |
|---|---|
| Description | Other specified functional intestinal disorders |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does K59.89 group to?
K59.89 sits in MDC 06 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 391Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCCmedical
- 392Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCCmedical
How is K59.89 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to K59.89. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Pseudo-obstruction intestine (acute) (chronic) (idiopathic) (intermittent secondary) (primary)
- Achalasia › sphincteral NEC (cardia) (esophagus)
- Atonia, atony, atonic › cecum
- Atonia, atony, atonic › intestine
- Contraction, contracture, contracted › anus (s)
- Contraction, contracture, contracted › rectum, rectal (s)
- Dilatation › anus
- Dilatation › duodenum
- Dilatation › ileum
- Dilatation › jejunum
- Dyskinesia › intestinal
- Dyspepsia › intestinal
Inclusion terms
Alternative wording in documentation that is classified to K59.89.
- Atony of colon
- Pseudo-obstruction (acute) (chronic) of intestine
Excludes1 — never code together — inherited from K59
The conditions below can never be reported together with K59.89 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 11
The conditions below are not part of K59.89, but a patient may have both at the same time. When documentation supports it, K59.89 and the excluded code may both be reported.
- 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)
Excludes2 — not included here — inherited from K59
The conditions below are not part of K59.89, but a patient may have both at the same time. When documentation supports it, K59.89 and the excluded code may both be reported.
- functional disorders of stomach (K31.-)
How long has K59.89 existed?
K59.89 first appears in FY2021 (FY2020 is not available, so it may have appeared then).
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.