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ICD-10-CM 2027 diagnosis code

A08.8Other specified intestinal infections

✓ Billable / specific

A08.8 is a valid, billable ICD-10-CM code for other specified intestinal infections. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About A08.8

A08.8 is the ICD-10-CM diagnosis code for other specified intestinal infections. It belongs to category A08 (viral and other specified intestinal infections), block A00-A09 (intestinal infectious diseases) and chapter 1 (certain infectious and parasitic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within A08, choose A08.8 (Other specified intestinal infections) only when documentation doesn't support a more specific option: Rotaviral enteritis (A08.0), acute gastroenteropathy due to Norwalk agent and other small round viruses (A08.1), adenoviral enteritis (A08.2), other viral enteritis (A08.3) and viral intestinal infection, unspecified (A08.4).

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 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC, relative weight 1.2392) and DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC, relative weight 0.7645), 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 008.8 (intestinal infection due to other organism, not elsewhere classified).

Notes that apply from higher levels

Instructions written at a parent level also apply to A08.8.

› From A08 Viral and other specified intestinal infections
Excludes1

Broader instructions also apply from Chapter 1: Certain infectious and parasitic diseases.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to A08.8.

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 →
  • 008.8Intestinal infection due to other organism, not elsewhere classifiedapproximate

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 A08.8

Is A08.8 billable?

Yes. A08.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can A08.8 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict A08.8 as a principal diagnosis.

Is A08.8 a CC or MCC?

No. A08.8 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does A08.8 group to?

A08.8 is used in the MS-DRG v44.0 logic for MS-DRG 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC) and MS-DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without 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 A08.8?

The CMS General Equivalence Mappings map A08.8 to ICD-9-CM 008.8.