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ICD-10-CM 2027 diagnosis code

K20.91Esophagitis, unspecified with bleeding

✓ Billable / specificMCC — major complication/comorbidity

K20.91 is a valid, billable ICD-10-CM code for esophagitis, unspecified with bleeding. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2021 (effective October 1, 2020). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About K20.91

K20.91 is the ICD-10-CM diagnosis code for esophagitis, unspecified with bleeding. It belongs to category K20 (esophagitis), block K20-K31 (diseases of esophagus, stomach and duodenum) 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 K20.9 (esophagitis, unspecified), K20.91 is specifically for esophagitis, unspecified with bleeding. Related codes cover without bleeding (K20.90).

Use an additional code to identify: alcohol abuse and dependence (F10.-).

As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" 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 368 (Major Esophageal Disorders with MCC, relative weight 1.6433), DRG 369 (Major Esophageal Disorders with CC, relative weight 0.9922) and DRG 370 (Major Esophageal Disorders without CC/MCC, relative weight 0.6744), 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 was added in FY2021, effective October 1, 2020.

Notes that apply from higher levels

Instructions written at a parent level also apply to K20.91.

› From K20 Esophagitis
Excludes1
  • erosion of esophagus (K22.1-)
  • esophagitis with gastro-esophageal reflux disease (K21.0-)
  • reflux esophagitis (K21.0-)
  • ulcerative esophagitis (K22.1-)
Excludes2
  • eosinophilic gastritis or gastroenteritis (K52.81)
Use additional code
  • code to identify:
  • alcohol abuse and dependence (F10.-)

Broader instructions also apply from K20-K31 Diseases of esophagus, stomach and duodenum and Chapter 11: Diseases of the digestive system.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to K20.91.

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.

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
  • FY2021 (effective 10/1/2020): Added
  • No changes since FY2021.

Common questions about K20.91

Is K20.91 billable?

Yes. K20.91 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can K20.91 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict K20.91 as a principal diagnosis.

Is K20.91 a CC or MCC?

K20.91 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does K20.91 group to?

K20.91 is used in the MS-DRG v44.0 logic for MS-DRG 368 (Major Esophageal Disorders with MCC), MS-DRG 369 (Major Esophageal Disorders with CC) and MS-DRG 370 (Major Esophageal Disorders without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.