ICD-10-CM 2027
ICD-10 code for Macrosigmoid
From the official ICD-10-CM alphabetic index entry “Macrosigmoid”. Page updated September 29, 2026.
About coding Macrosigmoid
The ICD-10-CM code for Macrosigmoid is K59.39 (Other megacolon). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on K59.39.
Within K59.3, choose K59.39 (Other megacolon) only when documentation doesn't support a more specific option: toxic megacolon (K59.31).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 393 (Other Digestive System Diagnoses with MCC, relative weight 1.5881), DRG 394 (Other Digestive System Diagnoses with CC, relative weight 0.9228) and DRG 395 (Other Digestive System Diagnoses without CC/MCC, relative weight 0.6382), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific Macrosigmoid codes (official index)
- congenital Q43.2 — Other congenital functional disorders of colon
Common questions about Macrosigmoid ICD-10 codes
What is the ICD-10 code for Macrosigmoid?
- K59.39 — Other megacolon. More specific codes apply when the documentation supports them: Q43.2.
What is the ICD-10 code for congenital macrosigmoid?
- Q43.2 — Other congenital functional disorders of colon.
Is K59.39 billable?
- Yes. K59.39 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K59.39 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K59.39 as a principal diagnosis.
Is K59.39 a CC or MCC?
- K59.39 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.