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ICD-10-CM 2027 diagnosis code

K55.20Angiodysplasia of colon without hemorrhage

✓ Billable / specific

K55.20 is a valid, billable ICD-10-CM code for angiodysplasia of colon without hemorrhage. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS, effective October 1, 2026. Updated September 29, 2026. About our data

About K55.20

K55.20 is the ICD-10-CM diagnosis code for Angiodysplasia of colon without hemorrhage. It belongs to category K55 (vascular disorders of intestine), block K55-K64 (other diseases of intestines) and chapter 11 (diseases of the digestive system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within K55.2, choose K55.20 (without hemorrhage) only when documentation doesn't support a more specific option: with hemorrhage (K55.21).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

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.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 569.84 (Angiodysplasia of intestine (without mention of hemorrhage)).

Notes that apply from higher levels

Instructions written at a parent level also apply to K55.20.

› From K55 Vascular disorders of intestine
Excludes1
  • necrotizing enterocolitis of newborn (P77.-)
Excludes2
  • angioectasia (angiodysplasia) duodenum (K31.81-)

Broader instructions also apply from Chapter 11: Diseases of the digestive system.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to K55.20.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 569.84Angiodysplasia of intestine (without mention of hemorrhage)exact

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about K55.20

Is K55.20 billable?

Yes. K55.20 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can K55.20 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict K55.20 as a principal diagnosis.

Is K55.20 a CC or MCC?

No. K55.20 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does K55.20 group to?

K55.20 is used in the MS-DRG v44.0 logic for MS-DRG 393 (Other Digestive System Diagnoses with MCC), MS-DRG 394 (Other Digestive System Diagnoses with CC) and MS-DRG 395 (Other Digestive System Diagnoses without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for K55.20?

The CMS General Equivalence Mappings map K55.20 to ICD-9-CM 569.84.