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ICD-10-CM 2027 diagnosis code

A32.7Listerial sepsis

✓ Billable / specificMCC — major complication/comorbidity

A32.7 is a valid, billable ICD-10-CM code for listerial sepsis. 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 A32.7

A32.7 is the ICD-10-CM diagnosis code for Listerial sepsis. It belongs to category A32 (listeriosis), block A30-A49 (other bacterial 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 A32 (listeriosis), A32.7 is specifically for Listerial sepsis. Related codes cover cutaneous listeriosis (A32.0), Listerial meningitis and meningoencephalitis (A32.1), other forms of listeriosis (A32.8) and unspecified (A32.9).

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 870 (Septicemia or Severe Sepsis with MV >96 Hours, relative weight 6.9408), DRG 871 (Septicemia or Severe Sepsis without MV >96 Hours with MCC, relative weight 1.932) and DRG 872 (Septicemia or Severe Sepsis without MV >96 Hours without MCC, relative weight 1.0066), in MDC 18 (Infectious and Parasitic Diseases, Systemic or Unspecified Sites), 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 027.0 (listeriosis) and 995.91 (sepsis).

Notes that apply from higher levels

Instructions written at a parent level also apply to A32.7.

› From A32 Listeriosis
Includes
  • listerial foodborne infection
Excludes1
  • neonatal (disseminated) listeriosis (P37.2)

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

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to A32.7.

Codes whose notes reference A32.7

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 →
  • 027.0Listeriosisapproximate, combination
  • 995.91Sepsisapproximate, combination

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 A32.7

Is A32.7 billable?

Yes. A32.7 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can A32.7 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict A32.7 as a principal diagnosis.

Is A32.7 a CC or MCC?

A32.7 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does A32.7 group to?

A32.7 is used in the MS-DRG v44.0 logic for MS-DRG 870 (Septicemia or Severe Sepsis with MV >96 Hours), MS-DRG 871 (Septicemia or Severe Sepsis without MV >96 Hours with MCC) and MS-DRG 872 (Septicemia or Severe Sepsis without MV >96 Hours 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 A32.7?

The CMS General Equivalence Mappings map A32.7 to ICD-9-CM 027.0 and 995.91.